Industrial Wood Briquette Becomes an Alternative Between Wood Chips and Wood Pellets

Biomass fuel is a renewable fuel or renewable energy that is currently positioned as one of the alternative fuel. However, along with awareness of various climate problems, the use of alternative energy from biomass has increased over time. The decarbonization trend as a response to climate problems has penetrated all lines of life including the industrial sector. As a profit-oriented industry, of course, efforts to maximize are a major concern, including in the use of alternative fuels. There are various types of fuels that can be produced from biomass and especially for solid fuels, including wood chips, wood pellets and wood briquettes. The characteristics of these fuels are slightly different from one another, including their production costs. It is necessary to look more carefully and deeply so that you can get the best biomass fuel according to the goals of the industry.

Industrial briquette can be produced in large quantities at a lower cost than briquette produced with hydraulics or extruders. And when compared to wood pellets, industrial wood briquette is also cheaper to produce. But of course the production cost is more expensive than wood chips. Wood chips can be said to be the easiest and cheapest biomass fuel to produce.

This places industrial wood briquette in a position between wood chips and wood pellets or hydraulic and extruder type briquettes. As a biomass densification product, industrial wood briquette is also more economical for long-distance transport. In addition, a number of industrial boilers have also been specially designed to be able to use industrial wood briquette fuel, even with automatic feeding. Other factors such as uniformity of shape, size can vary and low water content are other advantages of industrial wood briquette.

Boiler users in industry and even coal power plants can consider using industrial wood briquette. Especially for companies engaged in industrial utilities such as steam providers for processing industries so that the operation and maintenance of the boiler including the use of biomass fuel is the responsibility of the company. With a long-term steam supply contract, for example around 5-10 years, the provision of biomass fuel in the form of industrial wood briquette within that period is also very important. In addition to the availability of sufficient, legal and sustainable raw materials, the reliability aspect of industrial wood briquette production machines cannot be ignored.

 

Learning from the Success of Wood Pellet Industry in Asia (Vietnam) and Europe (Latvia)

The trend of using wood pellets globally has not been long, it only started around the early 2010s and a number of countries responded quickly so that their wood pellet industry grew rapidly as part of their economic engine in line with the global trend for decarbonization and green economy or bioeconomy. The readiness of a number of countries to respond to this opportunity is also not without reason but indeed their insight and knowledge have supported them to do so. Indonesia as a tropical country with vast land and abundant human resources should also be able to boost the opportunities of this wood pellet industry so that it becomes one of the world's main players.

Vietnam and Latvia are two countries in the world that are currently leading the wood pellet industry, there is even the largest wood pellet factory in the world there, for more details read here. Initially, both countries also started this industry from a small capacity. For Vietnam, Vietnam's wood pellet production began in 2012 with a very small capacity of around 175 tons/year and currently in 2021 or around 9 years later, production has reached around 4.5 million tons/year, placing Vietnam in second place as a world wood pellet producer, after the United States. The total production of 4.5 million tons/year is supplied from 74 wood pellet factories in Vietnam. In 2020, 3.2 million tons of wood pellets were exported to Japan and Korea for power plants with an export value of nearly USD 351 million. In addition to Korea and Japan, Vietnam's wood pellet production is also exported to Europe.

Initially, Vietnam's wood pellet production used waste from the furniture industry. Furniture waste in the form of sawdust from the industry was dry and its particle size was suitable for wood pellet production, so equipments such as hammer mills and dryers were not needed. Many Vietnamese wood pellet factories at that time did not have hammer mills or dryers. With raw materials ready to be pelletized, the cost of producing wood pellets was very cheap, plus the cost of labor was also cheap. However, as the demand for furniture industry waste for wood pellet production increased, the availability of these raw materials became increasingly scarce, so that new wood pellet factories could no longer use these wastes. Waste from other wood processing industries such as sawmills and veneer factories also became raw materials. Furthermore, with the increasing production of wood pellets, forest wood waste and other round wood became the next source of raw materials. This also increased production costs because tools such as hammer mills and dryers were needed so that the raw materials were ready to be pelletized.

Meanwhile, Latvia, as a small country in northern Europe, saw an opportunity to lead in this growing industry. With almost half of its territory covered by forest, Latvia had the natural resources to produce wood pellets. In the early 2000s, with government support for responsible forest management, sustainable wood production was introduced, including support for entrepreneurs who wanted to start producing wood pellets. It wasn’t long before the world caught on. Countries across Europe, including the UK, Denmark and Italy, began relying on Latvian wood pellets for their heating and power plants.

Despite being a small country, Latvia has become a major player in the wood pellet industry, competing with larger countries such as Germany and Sweden. Latvia is now one of the largest exporters of wood pellets in the world. Latvia's success story teaches us that even a small country with strong will, focus on quality, innovation and sustainability, natural resources can lead to global success. Latvia's success shows that when there is government support, technology investment and dedicated people, even a small country can lead in a competitive global market. And as the world increasingly looks for clean and sustainable energy solutions, the success of Latvia's wood pellet industry is an inspiring example of what can be achieved with vision, hard work and a commitment to sustainability.

Tropical countries like Indonesia are a "heaven" for biomass energy, this biomass energy is like a green battery that must be developed, for more details read here. When small countries like Vietnam and Latvia can boost their wood pellet industry, then Indonesia should not want to be left behind. When great potential is wasted, then besides being an ungrateful attitude that will have an impact on poverty and environmental damage, it is also stupidity. The large amount of land available, even millions of hectares becoming critical land and multi-benefit from energy plantations should motivate the wood pellet industry. When Vietnam and Latvia can do it, Indonesia should do the same.

Energy Plantations: Why Calliandra (Calliandra Calothyrsus) or Gliricidia (Gliricidia Sepium)?

Since 1937, calliandra has been planted in Perhutani and wider areas along with reforestation programs and supporting firewood and animal feed. And also since 1974, Perhutani has distributed calliandra seedlings to forest farmers and used them as boundary plants between forest areas and rural areas or agricultural land. Calliandra cultivation at that time was mainly aimed at providing firewood and animal feed for people living in the forest, and reducing dependence on kerosene for cooking. Calliandra is used as a terrace plant (erosion control) with high slopes to strengthen the main plantation, for example with teak plantations, and also for soil protection purposes, because it can increase soil fertility through the ability of its roots to absorb nitrogen in the form of root nodules.

While the type of gliricidia plant is widely used as an edge plant or hedge plant to prevent large livestock from entering the forest. The wood is used as firewood and the leaves are used as animal feed. The wood can be harvested quickly, and pruning is also done with a fast process. So it can be said that, it is not recommended to plant new species that have unknown characteristics until there is adequate research activity on the species.

For example, acacia species are relatively fast-growing species but it is not widely known whether they can be used and managed with a sustainable coppice system. And also these types are not like calliandra and gliricidia plants, although easy to cultivate and harvest, but have not proven to be suitable for the application of short rotation coppice systems, and are also rarely planted on a larger scale.

Although calliandra and gliricidia are not native tree species in Indonesia, they have long been introduced, and can be found almost throughout the island of Java. Calliandra and Gliricidia are very popular in agricultural areas in most parts of Java. In addition, there have not been many reports describing the presence of pests and / or diseases associated with either species. Wood produced from calliandra and gliricidia plants has relatively good physical and chemical characteristics to be used as firewood or as raw material for wood pellets. Its calorific value is high and its ash content is low.

Indonesia as a tropical country even with the largest land area in Southeast Asia will have great potential to develop the energy plantation. Energy plantations are essentially energy sources or likened to batteries, which store solar energy in plants, the energy plantation, for more details can be read here. Although the development of various types of renewable energy continues to be accelerated, to store energy in large capacities will require a very large battery. The battery research is also estimated to take a long time and high costs, so that in the context of decarbonization, biomass energy can be used for cofiring and even fulfiring until the time the large battery can be applied.

Large Capacity and Sustainable Wood Pellet Production in Java Island

Biomass for energy production can be cultivated on critical land, or so-called 'unproductive' land. The Ministry of Environment and Forestry estimates that critical land in Indonesia in 2016 was 24.3 million hectares (Times Indonesia, 2017). This is a very large area, and overall Indonesia's territory is large enough to provide biomass for renewable energy production.  

Globally, the need for wood pellets is predicted to continue to increase. This is because in the current power generation industry, more than a third of global electricity production still uses coal. This portion must drop to 4% by 2030 and 0% by 2040 if the world wants to limit global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) and prevent the severe impact of the climate crisis. The world has 6 years from now to reduce the use of coal in power plants to less than 4% by 2030, this is also what makes a number of coal companies develop renewable energy, especially wood pellets from energy plantations.

However, in Java Island, the availability of land for energy crop development is limited because it conflicts with the need for agricultural land. The greatest opportunity for energy plantation forest development is on land owned by Perhutani which is categorized as 'unproductive land'. In some cases, through social considerations, land can be directed to programs that are in line with the objectives of social forestry in accordance with the Decree of the Minister of Environment and Forestry number P.39 / 2017 and P.38 / 2016. However, as an effort to develop the business, Perhutani can utilize its land to specifically produce biomass for energy.

In accordance with Perhutani's long-term plan, and in line with the company's business development plan, Perhutani has allocated a forest area of ​​116,372 ha or around 4.7% of Perhutani's total area in Java (2,445,000 ha) as a potential area for biomass plant development spread across 13 KPH (Forest Management Units) in Central Java, East Java, West Java and Banten provinces.

Throughout the Perhutani area, there are potential areas that have unproductive forest stands (open land or reduce forest potential, or tend to be unproductive in the long term) covering an area of ​​308,000 hectares, spread across 57 KPHs. This area is divided into 15% in Central Java, 34% in East Java and, 51% in West Java and Banten. Based on the unproductive area, approximately in 27 KPHs it is calculated to be around 229,286 ha or 74% of the total potential area for Biomass Energy Plantations.

Hundreds of thousands of sawdust are currently used for PLN's cofiring program in Java, disrupting the supply of raw materials for wood pellet factories. This is why the production of wood pellets from sawdust taken from the sawmill industry or wood industry waste in Java for large-capacity wood pellet production will be at great risk of disrupting the supply of raw materials. So that the wood pellet factory in Java can run well if the availability of raw materials can be maintained and this can only be realized in two ways, namely first using its own raw materials, this can be done by sawmills and wood processing industries that utilize their own waste for wood pellet production, and second with raw material sources from energy plantations. The area of ​​land that can be used for energy plantations as described above is very potential for a source of raw material supply for large-capacity wood pellet production on Java Island and the availability of supporting facilities on Java Island which are more complete and better is an additional driving force.

Energy Plantations Energy Sources for All Time

 "Allah who makes fire for you from green wood, then you kindle (fire) from it." (QS. Yaasin (36): 80)

The sun was created by Allah SWT as the main source of energy for humans and living things on earth. It takes about 8 minutes for sunlight to reach the earth and is converted by plants into a food source so that it can be consumed by animals and humans. Humans also get food from animal sources. The more sunlight, the more can be converted by plants through the process of photosynthesis. Without the sun, plants die, animals die, humans die so that there will be no life on earth. Fossil fuels are essentially a source of energy from plants and animals in the past. Mining and use of fossil fuels will release a number of greenhouse gases (GHG) which increase the earth's temperature which at a certain level is dangerous for the earth's population itself. Efforts to overcome this are by using non-fossil energy and renewable energy so as not to contribute to increasing the concentration of GHG in the atmosphere which increases the earth's temperature.

From plants or trees can be directly used as a source of energy or fuel, namely firewood. Derivatives or energy products from plants are also very diverse and can meet all human needs, both energy in the form of solid fuels, liquid fuels and gas fuels. The production of firewood, wood chips, wood briquettes, sawdust, torrified biomass to charcoal are a number of solid fuel products. While the production of biooil, bioethanol, biodiesel, renewable diesel / green diesel, and bioavtur / bio jet fuel are a number of liquid fuels. And biogas and bio-syngas are gas fuels that can be produced from the original material in the form of plants.

A number of conversion techniques based on physics, chemistry and biology are needed for the conversion. The use of appropriate plant species is also needed to facilitate the conversion, for example for the production of solid fuels, biomass sources such as wood are needed, while if the target is liquid fuel, then the type of oil-producing plants that need to be pursued. Conversion from solid fuels to liquid or gas fuels can also be done but in general the longer and more complicated the process, the more expensive the production costs will be. But still, energy plantations are the basis for all of that.

Popular and fairly easy biomass processing is to make wood chips with size reduction then wood pellets and wood briquettes through biomass densification. Furthermore, to convert sugary biomass into ethanol with fermentation and azeotropic distillation, convert lignin biomass (lignocellulosic biomass) into ethanol with enzymatic hydrolysis reactions followed by fermentation and azeotropic distillation. Converting woody biomass into fuel with a thermal process can be burned directly or if you want to make charcoal, concentrate the fixed carbon, namely by pyrolysis or carbonization, and if you want to maximize liquid products / bio-oil / pyro-oil, namely by fast pyrolysis and if you want to maximize gas products, namely by gasification. And so that the characteristics of the biomass are like hydrophobic coal, the torrefaction or mild-pyrolysis process can be carried out. Torrefaction and densification are usually carried out together to optimize the biomass fuel product.

With gas to liquid (GTL) namely the gasification process and followed by the Fisher - Tropsch process, bio-ethanol, biodiesel and bioavtur / bio jet fuel can be produced. While from groups of plants that produce oil such as palm oil, biodiesel can be made especially with the transesterification or estran (esterification plus transesterification) process. Even used oil or used cooking oil / used cooking oil and miko (minyak kotor) / dirty oil or PAO (palm acid oil) can also be used for biodiesel / green diesel or further processed into bio-jet fuel / bio-avtur with the HVO / HEFA - SPK (Hydro-processed Esters and Fatty Acids-Synthesized Paraffinic Kerosene) process.

So basically, biomass from trees can be processed into various forms of energy or fuel needed by humans. In addition to being used directly as a heat source, this energy can also be converted into mechanical energy or electrical energy, for example biofuel-fueled vehicles to biomass power plants. So the source of energy throughout the ages stored in plants is this biomass as stated by Allah SWT in the verse above and there is no doubt whatsoever about it. Indonesia as a tropical country is a "heaven" for the production of biomass because of the rays of sunlight throughout the year and adequate rainfall and extensive land. The storage of energy in plants from sunlight is also likened to a battery that can be used anytime and anywhere for more details read here.

Another important thing to note for the creation of energy plantations or biomass plantations is the status of the land used. The land must not be from deforestation or land conversion (land use change) that damages the environment. Industrial plantation forests (HTI) that are in accordance with their designation can be used as energy plantations. In addition, biomass for producing energy can also be cultivated on critical land, or referred to as 'unproductive' land. The Indonesia Ministry of Environment and Forestry (KLHK) estimates that critical land in Indonesia in 2016 was 24.3 million hectares (Times Indonesia, 2017). This is a very large area, and overall Indonesia's territory is large enough to provide biomass for renewable energy production.

Energy Plantations: Not Only Wood Pellet Production But Must Also Support the Livestock Industry

The concept of energy plantation or biomass plantation by utilizing the whole tree seems to be still unpopular at this time. But sooner or later, God willing, it will happen because profit-oriented wood pellet companies will certainly maximize this aspect or profit, of course as long as it does not damage the environment and CSR (Corporate Social Responsibility) will be pursued in other ways. The main orientation currently focusing on wood products for wood pellet raw materials is certainly a good thing, but it would be much better if the benefits of all parts of the tree could be maximized. If this can be done, the benefits will not only be in the energy sector but also in food and feed, important sectors that are essential in human life.

The main composition of energy plantation leaves such as calliandra and gliricidia is protein and this protein element is an important and most expensive component compared to other elements of animal feed. With a large volume of leaves from energy plantations, it should support the livestock industry and not just be thrown away because it is just a by-product or waste that is less useful. In fact, from the livestock industry side, the opposite is true. The utilization of these leaves can be used directly on livestock or processed into animal feed in a processing industry depending on the local situation and conditions.

Large farms can be made from the utilization of energy plantation leaves as well as animal feed factories from the leaves. Leaf pellet production can be done with a production process similar to wood pellet production so that a wood pellet factory adjacent to a leaf pellet factory is also very possible. Like export-oriented wood pellet products, leaf pellets can also be the same. Meanwhile, if a large farm is to be carried out, waste from the livestock farm or animal waste can be used as raw materials / substrates for biogas production. The biogas can then be used for drying in the production of wood pellets or leaf pellets or used for electricity production. The residue from the biogas will become organic fertilizer, either solid organic fertilizer or liquid organic fertilizer. A simple diagram as below.

Thousands of cattle or breeding cattle are imported into Indonesia from Australia and New Zealand and cattle fattening is a promising business in Indonesia because the need for beef has not been met until now. The shortage of beef is met by importing buffalo meat from India and beef from Brazil. Support for the availability of abundant and quality feed is one of the important aspects of self-sufficiency in this meat. In addition to cattle, the need for goats and sheep is also very large. Yogyakarta, a city that is also famous for its goat satay cuisine, needs more than 1500 heads of sheep per day. In addition, the need for aqiqah and Eid al-Adha is also very large. The sheep export market is also very promising, which until now has not been met due to various factors, one of which is the feed factor. Feed in the livestock business plays a very important role or even around 70% of the cost of livestock is the cost of the feed. And livestock is a link in the chain of food needs for humans so that it is inseparable.

EFB Pellets as Biomass Fuel Transition from PKS to Wood Pellet Energy Plantations?

The high demand for palm kernel shells or PKS makes their availability or supply increasingly limited. The properties of palm kernel shells or PKS which have many similarities to wood pellets make them the main competitor for biomass fuel in the global market. The high demand for palm kernel shells is not only because the price is usually cheaper than wood pellets, but also the large availability can be achieved because of the large number of palm oil mills, also especially the many new biomass power plant developments that can use 100% palm kernel shells, namely biomass power plants with fluidized bed combustion (CFBC or BFBC) technology, read more details here. 

Under these conditions, efforts to obtain new biomass fuel become important. The palm oil industry itself produces a lot of biomass waste so it has potential as raw material for new biomass fuel. One of the biomass wastes that has not yet been utilized and is large in volume and has the potential to pollute the environment is palm oil empty bunches or EFB (empty fruit bunch). Every ton of crude palm oil or CPO production will produce approximately 1 ton of EFB waste. This means that with an average palm oil mill capacity of 45 tonnes of FFB/hour, around 10 tonnes/hour of crude palm oil (CPO) will be produced and 10 tonnes/hour of EFB waste. So, for example, if a palm oil mill operates 20 hours/day, approximately 200 tons of EFB waste will be produced/day. And with the number of palm oil mills in Indonesia estimated at 1,000 units, the amount of EFB waste will also huge.

PKS and EFB are both biomass waste from palm oil mills. Both can be easily obtained from palm oil mills in abundant quantities. PKS can even be used directly as biomass fuel, whereas EFB requires pre-treatment first. The EFB that comes out of the palm oil mill is very wet and the shape and size still need to be adjusted to make the follow-up process easier. EFB pellet production is a solution for EFB waste. But apart from that, so that this EFB pellet product can be used more widely or like wood pellets in general, there is an additional process to reduce the amount of mineral content in the ash.

Meanwhile, wood pellets from energy plantations could become the next source of biomass fuel, although currently someone has already started doing so. Because the raw material for EFB pellets is palm oil mill waste and is abundant, it requires a smaller investment, so EFB pellets can be used as transitional biomass fuel before biomass fuel in the form of wood pellets from energy plantations. Investing in land and its preparation as well as creating an energy plantation costs a lot of money. But the advantage of wood pellets from this energy plantation is that the availability of raw materials, even in very large volumes, can be more guaranteed. Apart from that, there are also other benefits from using the leaves as animal feed, especially ruminants and the flowers for honey bee farming.

Buy Wood Pellets or PKS (Palm Kernel Shell)?

The need for biomass fuel as a decarbonization effort because it is a renewable fuel that is carbon neutral is increasing. Two biomass fuels that are popular in the world and compete fiercely are wood pellets and palm kernel shell (PKS). Under normal conditions or without a spike in demand, the price of wood pellets is usually more expensive than PKS. This is understandable because wood pellet production requires more effort than PKS. Wood pellet production requires a number of equipment with an expensive investment, while PKS only requires minimal equipment, namely just a screening/sieving machine.

But what if the prices of wood pellets and PKS are almost the same or even PKS is even more expensive? This can happen due to several factors, namely first, the influence of market demand. High market demand, especially PKS from Indonesia and Malaysia, means supply is reduced or inadequate. PKS production in Indonesia and Malaysia is indeed much greater than wood pellet production from these two countries. Apart from the larger production volume, factors such as availability and continuity (long-term security of supply) can be guaranteed more than wood pellets. This is because it is estimated that there are 1500 palm oil mills in Indonesia and Malaysia that produce PKS which is a by-product or waste of palm oil mills. This allows for long contracts between sellers or suppliers (exporters) and buyers who are usually not end users but trading companies in Japan and Korea.

Loading PKS for export with transhipment (ship to ship)

The second factor is levy and tax. PKS exports in Indonesia are subject to levy and tax whose value is correlated with the price of crude palm oil (CPO). This is because PKS in Indonesia is included in the palm oil derivative product category, whereas in Malaysia it is not subject to these levy and tax, because PKS in Malaysia is included in the palm oil waste category. When levy and tax are high, the price of PKS will automatically become expensive. This levy and tax factor is something that PKS exporters cannot control. Through the APCASI organization (Indonesian Palm Kernel Shell Entrepreneurs Association) they are fighting for levy and tax to be more measurable or cheaper, even if they can be eliminated like in Malaysia.

Basically buyers will buy the best possible goods at the cheapest possible prices, or better quality goods but cheaper prices. The quality of wood pellets is better than PKS, namely in terms of calorific value, ash content, shape uniformity and moisture content. However, due to volume factor and continuity (long-term security of supply) which are often or still widely in doubt, the choice to go to PKS is still being made. To overcome this, wood pellets production must meet production capacity with a reliable source of raw material supply. Production of wood pellets from energy plantations is the solution.

With wood raw materials from energy plantations, the supply of raw materials will be more stable, unlike those that rely on collecting wood waste from sawmills or wood processing industries. With Indonesia's production forest area reaching tens of millions of hectares, of course land is not a problem in wood pellet production. Wood pellet production centers can be created on these production forest lands, for more details, you can read here.
 

Utility Business for Palm Oil Mills

When the priority is to obtain the maximum profit, good environmental management and ease, efficiency and stability of production as an option, then utility matters at the palm oil mill may be collaborated with other parties. This specialization becomes important because of the priority choices above. The utility problems in question are electricity and steam. Electricity is produced from a steam turbine and steam is produced from a boiler. High pressure steam enters the steam turbine to drive a generator and produce electricity and low pressure steam output from the steam turbine is used for the fresh fruth bunch (FFB) sterilization process. Water treatment for boiler feed is also part of the utility problem, as well as for boiler operations to produce output in the form of electricity and steam.

Regarding cooperation or business models, palm oil mills can pay for the electricity and steam they receive. But because the fuel or energy to produce electricity and steam comes from palm oil mills, of course the price is cheaper. If currently almost all palm oil mills use their boiler fuel from mesocarp fiber and palm kernel shell (PKS), then with this specialization it is possible for palm fiber (mesocarp fiber) and empty palm fruit bunches (EFB) to be used as fuel or energy sources while palm kernel shells (PKS) can 100% sold and even exported. Palm kernel shells (PKS) as biomass fuel can be sold directly and are in great demand, and are also the main competitor for wood pellets in the global biomass fuel market.

Under these conditions, there are efforts to increase the efficiency of utility production such as steam and electricity as optimally as possible, not only combustion technology with static grates, moving grates, reciprocating grates to fluidized beds, but it is even possible to use pyrolysis. EFB or empty palm fruit bunches, which were previously unprocessed and were an environmental problem, can become a potential energy source so that 100% of the palm kernel shells / PKS from palm oil mills can be commercialized/sold. And even if the utility provider uses pyrolysis, biochar will also be obtained. Biochar provides many benefits related to soil fertility and climate.

From Carbon Neutral to Carbon Negative : Development of Batteries, Wood Pellets, Carbon Capture and Storage (CCS) and Biochar

Research to develop large capacity batteries continues to be carried out so that electricity produced from renewable energy power plants such as wind and solar can be stored and used at any time. Electricity generation that comes from wind and sun is intermittent, that is, at any time the wind may not blow or there will be thick clouds or at night so there is no sunlight and electricity cannot be produced. In this condition, it is necessary to use a large capacity battery that can store this electricity. It is predicted that the development of this battery will not only require large costs but will also take a long time. It is predicted that it will take several decades for this battery to become a reality.

The current electricity supply, the majority of which still uses fossil fuels, especially coal, which has been proven to be environmentally unfriendly (carbon positive), needs to continue to be reduced and the portion of renewable energy in the form of wood pellets (carbon neutral) added by cofiring. The portion or ratio of cofiring can continue to be increased and can even be 100% using wood pellets (fulfiring). If the coal power plant can be changed 100% to a biomass or wood pellet fueled power plant, the power plant will become environmentally friendly or carbon neutral. And at a time when renewable energy sources are abundant and the electrical energy products can be stored in large capacity batteries, it is possible that power plants using combustion technology could be closed or stopped.

The use of wood pellets can be said to be an intermediate solution before the battery era. Large capacity wood pellet production will ideally use energy plantations as a supplier or source of raw materials. Fast rotation crops and plantations from legume groups such as calliandra and gliricidae are the right choice for these energy plantationns. Energy plantations themselves can act as carbon sinks or absorb CO2 from the atmosphere. With good management so that the volume of biomass or wood harvested is smaller or maximum equal to the plant growth rate, the function of energy plantations as carbon sinks continues to be maintained. Using wood pellets as carbon neutral fuel while managing energy plantations as a carbon sink or negative carbon provides optimal environmental benefits.

 

The use of 100% biomass fuel in power plants is carbon neutral, the same as the use of renewable energy from wind, water and sun. However, the use of biomass energy, especially wood pellets, is not intermittent and is always available when needed. Using batteries will be a solution to the intermittent problem. This 100% biomass fueled power plant can become carbon negative when using CCS (carbon capture and storage) devices. And this is very good because it can return the CO2 emitted into the atmosphere back to the bowels of the earth (carbon negative). And when coal power plants are installed with CCS devices, they will become carbon neutral. However, the CCS device is still very expensive and its operation is also not cheap.

And when the battery era arrives so that electricity generation using combustion technology is closed or stopped, the wood from the energy plantations that have been created will be used as raw material for biochar. It is possible that the wood from these energy plantations is still made into wood pellets to save transportation costs and make handling easier and then taken to pyrolysis facilities for biochar production. Biochar used in agriculture has dual benefits, namely improving soil quality and as a carbon sink. Using biochar with fertilizer will create slow release fertilizer, thereby increasing NUE (nutrient use efficiency) for plants, thereby saving fertilizer costs and reducing environmental pollution. Biochar is able to last or not decompose for hundreds of years or is permanent in the soil. The more biochar used, the more benefits it will provide for soil fertility and climate. Biochar as a carbon sink or carbon sequestration is also carbon negative. Energy plantations with good management will become carbon sinks and the biochar is also a carbon sink in the form of carbon sequestration, of course this provides the most optimal climate benefits.

Palm Kernel Shell (PKS) Exporter Company and Developing Wood Pellet Production Business

PKS loading for export

The decarbonization trend that continues to increase along with the increasing demand for biomass fuel has made a number of palm kernel shell (PKS) exporting companies plan to expand their business into wood pellet production. Established palm kernel shell exporters usually have sales contracts with overseas buyers, which can be short-term or long-term contracts. This palm kernel shell exporters only collect palm kernel shells from a number of palm oil mills/CPO factories, then cleans them and simply dries them before they are ready to be shipped. Indeed, there are also a number of overseas buyers of palm kernel shells which do not need cleaning and drying so the price is also cheaper. Cleaning palm kernel shells usually uses a sieve (screening) machine, either a vibrating screen or a rotary screen, for more details, you can read here. Meanwhile, for drying, it is usually only aired by occasionally turning over the pile of palm kernel shells with an excavator.

Palm kernel shells and wood pellets are two popular biomass fuels in the global biomass fuel market. Palm kernel shells are the main competitor of wood pellet products because they have almost the same properties such as calorific value, ash content, size and so on, but palm kernel shells are usually cheaper because they are a by-product or waste from palm oil mills and only require a simple process to produce then exported. Meanwhile, wood pellets, although the raw material can come from woodworking industry waste or sawmills, require a more complex production process and investment in the equipment required. 

Typical Circulating Fluidized Bed (CFB) power plant in Japan

Palm kernel shells and wood pellets are mostly used as fuel for power plants abroad such as Japan and Korea. Wood pellets can be used in almost all coal power plants by cofiring, while palm kernel shells are more limited. This is mainly because crushing palm kernel shells and mixing them with coal powder (cofiring) in pulverized combustion is more difficult. Palm kernel shells can be used 100% in power plants with fluidized bed or stoker technology. And currently quite a lot of power plants in Japan use fluidized bed technology.

And because they are in the same market, palm kernel shell exporters are also very likely to know the need for wood pellets. Buyers of palm kernel shells abroad are usually also buyers of wood pellets too. The practice of collecting palm kernel shells from palm oil mills is almost the same activity as collecting wood waste from wood processing industries and sawmills, so it should not be difficult for exporters of palm kernel shells. But creating energy plantations as raw material for wood pellet production is the ideal solution. Collecting wood waste or collaborating with the wood industry that produces this waste is an intermediate solution and energy plantations are the ideal solution. Thus, it is very reasonable for palm kernel shell exporters to expand into the wood pellet production business.