Biochar for Chicken Farming

With the fast growth of the human population in the world and in line with the need for food or more specifically protein in the form of meat and eggs, the chicken farming industry has become a heavy burden. The projection of protein demand in 2050 is estimated to increase by 69% and almost half of it will come from chicken farms. The main focus of research and development in chicken farming today is how to meet the protein needs above. And that is only possible by developing new technologies to increase the efficiency of the use of feed nutrients in these chickens.

In 2017, global animal feed production has exceeded 1 billion tonnes for the first time and the livestock industry sector accounts for almost half of it, namely 44% of the total feed production or means more than 440 million tonnes alone. With the growth in world population, there is no doubt that the need for feed will also continue to increase. In addition, there is a real environmental impact on the dependence of soybeans from the United States and Brazil as a source of protein for these poultry or chicken farms. Environmental problems are also getting bigger with the presence of nitrogen compounds from the farm in the water flow and pollution of ammonia gas emissions (NH3). In addition, the use of feed with excessive protein content increases the tendency for disease to occur and increases the need for water by the chickens, which causes the problem of dung to become wet and soggy.

There has also been an increase in the use of other protein sources as ingredients for chicken feed, such as legume, peas and so on. But currently its use is still limited due to the compatibility of amino acids, mycotoxins and ease of pelletization. Feed pellet technology is a spectacular 20th century invention that continues to evolve today, for more details read here. The use of low protein feed and the high absorption of these nutrients can be a solution to the problem of ammonia pollution. Biochar can be added as a feed supplement (feed additive) to increase the efficiency of the feed conversion. Biochar in the internal body of the chicken will be able to deactivate a number of toxins and activate microbes either in the chicken intestine or improve the digestive system of the animal. This can be indicated by the rapidly increasing vitality of livestock.

Meanwhile, external factors that affect the health and productivity of chickens are the cleanliness of the cage. Feed factors and house hygiene including air circulation are very important to maintain the survival and productivity level of the chicken farm. The more population with a high density of chicken farms, the greater the pressure on disease. The high nutrient or protein content in chicken manure plus humid conditions is an ideal location for a number of germs to breed. In addition, ammonia emissions are also very damaging to the environment because they will form nitrous oxide (N2O), acidifying soil and eutrophication of waters.

The use of biochar as a feed additive and treatment of manure will minimize the two main problems mentioned above, namely livestock health and environmental pollution. In the end, with the health of the livestock is maintained, the level of livestock productivity is also well maintained. The quality of biochar for feed additives is also different from that of manure treatments. This is of course because the main uses and purposes are different. Biochar for the feed additive needs to be designed in such a way that the grade as a feed additive is met, such as by using selected biomass raw materials, modern pyrolysis technology so that control of the production process can be carried out properly from handling to packaging. As for the use of livestock manure treatment, the quality of biochar is lower, including the use of biomass raw materials, pyrolysis technology and so on. For more details, like the diagram below.

According to a number of studies, adding up to 0.6% biochar in feed increases chicken growth by an average of 17% and it is recommended to mix 0.4-0.6% biochar in the daily feed. Broiler chickens that were given biochar supplements reportedly increased their body weight by 5-10%. If 0.5% of biochar is used as a source of chicken feed additives for world chicken or poultry feed production, the potential need for biochar is 220,000 tonnes annually. And if the chicken manure is used for energy production in the biogas unit, the addition of biochar increases methane (CH4) production and the compost quality of the digestate.

Modern Ruminant Livestock Paradigm: Reducing Methane Production and Increasing Feed Efficiency

The gases in the atmosphere that can capture the sun's heat are called greenhouse gases (GHG). Which includes greenhouse gases in the atmosphere, among others, are carbon dioxide (CO2), nitrogen dioxide (N2O), methane (CH4), and freon (SF6, HFC and PFC). Methane gas (CH4) is a dangerous gas for the earth's atmosphere and one of the greenhouse gas groups above because of the destructive power of methane gas 21 times carbon dioxide (CO2). This requires efforts to prevent methane gas and reduce its production. An example is the use of POME waste or palm oil mill effluent for biogas production. In this way, methane occurring in the open air (aerobic) will be avoided (methane avoidance scenario) and will not be released into the atmosphere with the biogas unit. The livestock sector also has the potential to produce, namely the group of ruminant farms or ruminant animals. The methane is produced in the ruminant's rumen as part of the digestion process. It is estimated that the contribution of methane from ruminant livestock is dominant and of course it needs to be reduced. The production of methane gas (CH4) besides being an environmental problem also causes a lot of energy loss in livestock. And it turns out that there is a process of reducing methane production which simultaneously improves health and increases body weight and milk production.

Large ruminant farms should be more aware of this condition and have a greater incentive to reduce methane production. Biochar is a feed supplement that can be used for the above purposes. The use of 1-3% biochar from dry feed ingredients has been shown to significantly increase body weight gain in beef cattle, as well as milk production in dairy cows. Experiments in Australia on beef cattle for 2 months have given a weight gain of 10% compared to those who do not use biochar. As for dairy cows, it has provided a profit of $ 70,000 per year. For more details, read here. Meanwhile, the reduction in methane gas emissions is estimated at 29% from the use of biochar. Once paddle 2-3 islands, so the saying goes.

Another effect of using biochar as a feed additive is that livestock manure becomes denser and less smelly. Biochar can also be used alone to deal with the smell and viscosity of livestock manure, so that the cage becomes cleaner and does not smell strong. In addition, if the manure is used for production, the biogas production will also increase, for more details, please read here. The composted digestate will also produce better organic fertilizer (compost) because of the additional biochar.

The quality of biochar is also very important, especially for animal feed supplements. Meat and milk are livestock production to meet human food needs, so that it will also affect humans in the end. The quality of biochar is determined by the raw materials used and the production process carried out. This indicates that not all biochar has the same quality, for example biochar from agricultural wastes with high ash content with traditional processes, with wood biomass raw materials with a small ash content and modern processes, of course the results are different, for example using the same modern technology will have different results. The differences mainly lie in their physical chemistry properties.

Biochar production should also be designed according to its objectives, for example the biochar feed supplement above must use selected biomass raw materials and modern processes so that the quality is stable and maintained. Meanwhile, the reference for biochar quality can be OMRI, USDA or IBI. World feed livestock associations or organizations such as FEFAC, IFIF and AFIA are currently very concerned about safety and sustainability, so this can be in line with biochar as a feed additive. Biochar as a feed additive, especially dairy cattle, has been accepted by almost all European Union countries. Meanwhile, for purposes such as reducing odors and the dilution of impurities, biochar is produced from any biomass and even by using simple technology (low tech).

Briquetting of Pineapple Plantation Waste

Pineapple is a fruit that is quite popular throughout the world, this can be seen from the percentage of pineapple fruit production in world fruit production which reaches 8%. Pineapple plants are almost the same as banana trees, that is, after bearing fruit once, the plant dies, and then the production is continued by the saplings for several generations. Or more specifically, pineapple plants produce after 1-2 years of planting and die after fruiting and produce about 70 leaves. The pineapple plants will be dismantled after two or three harvests to be replaced by new plants, which results in increasing pineapple leaf waste. Currently there is almost no utilization of this waste and pineapple leaves also cannot be used for animal feed, so they are only burned or thrown away which also causes environmental pollution. In every hectare of pineapple plantation, the waste produced can reach 3 tons. Large pineapple plantations are usually with an area of  thousands or even tens of thousand of hectares so that the production of this waste is also very much. Handling pineapple leaf waste with an effective and efficient method will certainly provide added value when examined from an economic point of view, so it is necessary to make efforts to handle this waste and briquetting  can be the perfect solution to this problem.

Although both use biomass densification technology, briquetting of pineapple leaves and stems is easier and cheaper than to make pellets. The production of pineapple leaf briquettes can then be used for cooking fuel, industry and even electricity generation. In addition, pineapple leaf briquettes are also used to increase biogas production. There are large pineapple plantation companies that have cattle farming businesses. Cattle farms are chosen mainly because they can use pineapple skin or fruit waste to feed the cows. And because the volume of pineapples produced is also very large, the fruit waste is also large and the cattle farm that is made is also large. The cow manure is usually further processed for biogas production and the digestate of biogas then composted. The compost produced is reused in the pineapple plantation. The briquettes of pineapple leaves and stems added to the substrate or co-digestion will further increase the biogas production significantly. Read here for more details.

With a scenario like the one above, almost all of the biomass waste generated from the pineapple plantation and industry can be utilized optimally. Likewise, the waste from a side business in the form of cattle farming for biogas production. In addition to large pineapple plantation companies, pineapple production centers in Indonesia such as Subang, Pemalang, Prabumulih, Kediri, Blitar, Kubu Raya, Mempawah, Muaro Jambi, Kampar, Central Lampung and Karimun can also develop the above concepts.

Learning the History of the World Animal Feed Industry

The ability to create a stable supply of food from livestock led to the world's population developing, community centers developing and cities emerging. The domestication of wild plants and livestock, as well as the use of irrigation and tillage tools, has resulted in a growing population. When the human population is increasing and many people live in urban areas, livestock and agriculture are increasingly organized, efficient and productive with the use of technology and various innovations. The science of animal feed nutrition became a scientific discipline starting about 200 years ago. In 1810 the German scientist Albrecht Daniel Thaer developed the first animal feed standard by comparing the nutrients of different types of hay. This was followed by a number of discoveries related to animal feed nutrition such as proximate analysis systems, feed standards based on digestible nutrients, vitamins and minerals needed by livestock, until 1944 L.A. Maynard published a table of nutritional needs for livestock and laboratory animal husbandry. The table of nutritional requirements then becomes the world standard for feed formulation to date including ruminants such as sheep, goats and cows.

Animal feed into a trade commodity or commercial product began in the early 1800s when the means of transportation and moving agricultural products mainly used horses and donkeys. Horse farm and breeding is an important thing. Horse stops as resting places are made along the route between cities as public facilities or similar to gas stations at this time. One of the important things in this resting place is the provision of quality feed for the horses, such as hay, seeds and so on. This has sprung up a number of businesses providing horse and donkey feed, and a number of feed companies that exist today such as Cargill, ADM, Purina, and Ridley started here, even though at that time the use of scientific feed formulations was very minimal.

Horse stopping and feeding station in the 1800s

 

Feed mills in America are built adjacent to grain mills, even many industries have been engaged in grinding the grain is also involved in the feed industry. The animal feed industry uses by-products or waste from grinding these grains. The first animal feed mills were made by adding a number of nutrients to the byproducts of wheat flour. The use of technology and mechanization is also increasing in number to achieve feed products with uniform quality and efficient production processes. Around 1900 the hammer mill was first used followed by the horizontal batch mixer in 1909. The early 20th century saw many advances in the use of technology for animal feed but the most noticeable and dramatic progress was when Purina introduced feed pellets in the 1920s. With this pelletization, the powder is less favorable to livestock (unpalatable), the different densities become easier to use and increases uniformity. This pelletization technique was quickly in demand by many feed producers so that in 1930 there were a number of feed factories that specialized in the production of these feed pellets.

Around 1940 and 1950 the formulation of feed was more complex with the addition of vitamins and minerals. In the late 1950s progress and specialization continued in the feed industry. In addition, the production capacity is also getting bigger, even in the 1970s the range of animal feed factory capacity was between 200 - 500 thousand tons per year. Meanwhile, large farms choose to make their own feed to make it more competitive. The use of automation in feed mills began in 1975 and continues to evolve to minimize feed costs and maximize efficiency in the production process. The technology and software for the production process continue to develop, including the logistics of various feed ingredients, size characteristics, the pelletization process, the extrusion process, and many other things in production.

Meanwhile, the development of the animal feed industry in Europe is more or less imitating the existing development pattern in America. Grain processing and milling technology advanced rapidly in the 19th century. In an effort to accelerate the development of the animal feed industry in Europe, in 1959 Belgium, France, Germany, Italy and the Netherlands formed the European Feed Manufacturers' Federation (FEFAC) as an organization for the feed industry in Europe. FEFAC has a mission to unite the feed industry and establish communication and cooperation in the European region. Even though it was quite successful in this effort, FEFAC experienced quite horrendous problems, namely in 1996 with the Bovine Spongiform Encephalopathy (BSE) crisis because it was related to feeding derived from mammalian meat and bone meal (MBM) or bone meal and mammalian meat for ruminant feed. Meat infected with BSE causes Creutzfeldt-Jakob disease in humans, which creates a high risk to the human food chain. After the outbreak spread, the use of MBM in animal feed was prohibited. This regulation causes a high dependence on imported raw materials such as soybean meal for a sustainable supply of meat, milk and eggs. Learning from this, FEFAC in the 21st century has a focus on feed and food safety initiatives. The organization took initiatives to be globally enforceable, such as in 2001 banning the use of MBM, in 2006 banning antibiotics in feed, legislation related to nitrates in livestock manure, and the use of GMO raw materials (GMOs).

Brazil is a country in South America that is quite developed in the animal feed industry and is currently the third largest supplier of animal feed in the world. Interestingly, commercial feed production in Brazil was only practiced in the 1960s. The development pattern of the animal feed industry in Brazil uses the same model as in America and Europe, namely the companies involved in milling and processing grains such as wheat and maize were also the first to be involved in the animal feed industry. The first wheat bran was built in the 1940s. Currently in Brazil, part of the feed industry is integrated with its livestock, or about 80%, which means that the feed manufacturing industry is also the same industry as the livestock. Another interesting thing is that Brazil also ranks second in the world for the pet feed industry, even though this industry was almost non-existent before the 1990s. Brazil has abundant production of maize, soybeans and other commodities which greatly support the animal feed industry.

China is the largest animal feed producer in the world, accounting for nearly 20% of the world, followed by the United States (17.4%) and Brazil (6.8%). The history of the animal feed industry in China began in 1930 with the first modern flour mills established and was followed by the use of the mill's by-products for animal feed. Meanwhile, the first modern feed factory was only established in 1949. Furthermore, due to the political uncertainty and slow economic growth and the centralized government, grain production decreased so that most of it was for human consumption. The growth of the feed industry and livestock is also very limited. Changes in political conditions in 1976 made the animal feed industry begin to grow again. In 1977 a comparative study was conducted on the feed industry in France, Japan and America. And in 1984 a draft plan for the development of the feed industry was published with outlines of objectives and strategies for the years 1984-2000.

In the same year (1984) a number of policies were also issued to support the development of the domestic feed industry, such as high export taxes for feed ingredients and milling equipment, tax free for up to 3 years for new feed factories and even tax free if the factory was not yet producing with sufficient profit. The first feed standard was issued in 1996, but due to inconsistent interpretation of the standard, nearly 10% of animal feed tests were substandard in 1998. Even in 2007 there was a withdrawal of pet feed due to contamination with melamine and cyanuric acid (which is high in nitrogen and identified as a crude protein content) in protein elements that cause kidney failure. The use of nitrogen from the above chemical is also carried out on agricultural products as well as the withdrawal of agricultural products from China in South Africa, the European Union and the United States. Even America ordered the USDA to inspect all agricultural products from China. In 2008 and 2009 China focused on eliminating the problem of counterfeiting or mixing and the effects of the resulting crisis. In 2010 a revised version of the feed and feed additive regulations was published to further ensure quality and safety. Although China is the largest feed producer in the world, the need for feed raw materials still relies on imports, especially soybean flour / meal to support food needs in the form of meat, milk and eggs for around its 1.3 billion people.

The source and availability of feed has always been the main orientation for livestock business. From the above history it is clear that large farms were always built close to a source of feed such as mills. The role of the government is also very important to encourage this effort. The high price of factory-produced concentrate can also be a driving force for the growth of large farms adjacent to energy plantations. The protein element in feed, apart from being essential, is also the highest cost element, while feed itself holds the highest cost component in animal husbandry or around 70%. Ruminants are herbivores so their food comes from plants, the case of MBM in Europe can be an expensive lesson that feeding from mammals actually creates new problems. Moreover, if the food category is najis/unclean, then the livestock become jalalah animals which are prohibited from being consumed (haram). Meanwhile, the case of mixing with dangerous chemicals that occurred in China with melamine and cyanuric acid was only to deceive the protein content so that it looks high is also dangerous for the health of the human body.

The momentum of the energy plantation or biomass plantation can be a great momentum for the growth of the ruminant livestock industry as long as it is well prepared. Other feed sources can be obtained from the surrounding environment so that the complete feed composition can be fulfilled. Bran from rice mills are also not difficult to find in Indonesia because the staple food of the majority of Indonesia's population is rice. Rice fields for rice farming are almost everywhere, so are the rice mills. Other sources of grasses such as elephant grass, benggala grass and so on as a source of fiber or agricultural wastes such as straw, peanut leaves, corn leaves and stalks and so on can be done by empowering the surrounding community. And when the feed production is sufficient for their own needs, the excess feed production can be sold elsewhere.

Benefits of Palm Oil Company When Produce Biochar

There are at least four things that become motivation for biochar production, namely as in the chart above. There are a number of slices that make the impact of biochar application multi-benefits, which is very much in line with today's world problems, namely climate change and global warming. Biochar has also been accepted as an instrument to reduce the concentration of CO2 in the atmosphere which causes the two big problems above, namely in 2018 biochar was included in the Intergovermental Panel on Climate Change (IPCC) as one of the negative emissions technologies (NETs). Biochar application is a carbon negative scenario because biochar can absorb CO2 from the atmosphere. This is slightly different from the use of biomass fuels such as wood pellets, wood briquette and palm kernel shell (PKS) in industrial boilers or power plants, which are carbon neutral scenarios. Indeed, basically there are 3 big scenarios to reduce the concentration of CO2 in the atmosphere, namely increasing the efficiency of equipment that uses fossil fuels, using carbon neutral fuels and carbon negative scenarios such as biochar.

Palm oil trees are known to require a lot of water and fertilizer to maintain the life sustainability and productivity of their fruit, so practical efforts in the form of increasing fertilizer nutrient efficiency and increasing fruit productivity are important. Besides that, palm oil mills produce a lot of biomass waste, especially empty fruit bunches (EFB ) and mesocarp fiber, which are very potential for biochar raw materials. The biochar is then applied in palm oil plantations which can be used with chemical fertilizers or with compost / organic fertilizers.

Pyrolysis and gasification technologies are commonly used for the production of the biochar. Apart from producing biochar by pyrolysis or gasification, energy is also produced which can be used for the business development of the palm oil industry or for electricity production. Production of PKO (Palm kernel oil) from kernel processing at KCP (kernel crushing plant) or production of torrefied PKS from PKS processing with torrefaction can be done by utilizing excess energy from the production of biochar. Most of the palm oil mills or CPO mills do not have kernel processing or KCP to produce PKO. And by making torrefied PKS, the caloric value of PKS will increase, it is easy to downsizing (increased grindability), for example in the use of cofiring and does not absorb water (hydrophobic property). In general, palm oil mills will have many advantages, both economically / financially and environmentally, with this biochar production.

Apart from being used for business development like the diagram above, excess energy from pyrolysis or gasification can also be used as boiler fuel in the palm oil mill. In this way the energy to heat the boiler, which is usually with palm kernel shell and mesocarp fiber, can be replaced by energy from pyrolysis or gasification. After that, all of the palm kernel shells / PKS can be sold or exported, thus providing additional profits for the palm oil company. The need for biomass fuel, especially palm kernel shell / PKS, is predicted to increase, both in the domestic market and in the export market. Japan is currently the largest consumer or user of palm kernel shells and it is predicted that the demand will also increase. Japan will also impose stricter standards on imports of palm kernel shells to ensure environmental sustainability by applying the GGL (Green Gold Label) certification which will be effective starting April 2023. This is like the wood pellets with FSC certification. If anyone is interested in an economic analysis of the use of biochar in palm oil business, please contact us.

Biomass Cofiring, Energy Plantation and Ruminant Animal Husbandry

Biomass cofiring with coal in coal power plants in Indonesia as a PLN (Indonesia electricity state owned company) program to support the use of renewable energy, especially biomass, could be the closest momentum for energy plantations. The program is also an effort to achieve the target of using renewable energy of 23% by 2025, while until now it is still less than 5%. In 2020 the cofiring program has been initiated with a target of 37 coal power plants but in practice 20 coal power plants have been implemented. While in total there are 114 coal power plant units owned by PLN that have the potential for cofiring, spread across 52 locations with a total capacity of 18,154 megawatts (MW) as a target of completion in 2024. The details consist of 13 coal power plant locations in Sumatra, 16 coal poer plant locations in Java, 10 locations in Kalimantan, 4 locations in Bali, NTB and NTT, 6 locations in Sulawesi, and 3 locations in Maluku and Papua. Meanwhile, the cofiring ratio ranges from 1-5% biomass with an estimated biomass requirement of 9-12 million tons per year.

And recently there has also been an agreement between PLN and Perhutani (Indonesia forestry state owned company) and PTPN III (Indonesia agriculture state owned company) to supply biomass for the cofiring program, for further information, please read here. In this case, PLN is the owner of the coal power plants, while Perhutani owns the resources of industrial plantation forest areas both in Java (Perhutani) and outside Java (Inhutani) which can be developed as energy plantations or energy forests. Likewise with PTPN III with its land which can also be used for this energy plantation. Gliricidia sepium and red calliandra (calliandra calotyrsus) are two species of fast-rotating crops that are most likely to be used for these energy plantations. If every 4,000 hectares produces a production of 10,000 tons / month of wood pellets or 120,000 tons / year, at least 400,000 hectares are needed to meet the 1-5% cofiring target which is equivalent to 9-12 million tons per year. The potential of gliricidia leaves or calliandra will also be very abundant. And it should also encourage the growth and development of the ruminant industrial sector. Moreover, if in the future PLN increases its cofiring portion, for example 6-10% or even 20%, of course the energy plantation needed will be very large, as well as the abundant potential of gliricidia leaves or calliandra.

The Covid-19 pandemic is still ongoing with the increase in cases getting bigger in Indonesia and there is no sloping curve yet, even positive cases have penetrated more than 1 million people. It is predicted that this pandemic will become a long-term problem with indications, among others, that new variants are found so that the vaccine that has been prepared is not or less effective and the emergence of a second wave of covid outbreaks even after vaccination has forced cities and even the state to lock down. . How almighty is Allah SWT with all His will, which should further strengthen our iman and taqwa. The prolonged condition of the Covid-19 pandemic makes people afraid and avoids crowds or gatherings including professional activities such as offices and industry. This condition will also encourage the growth of efficient business activities by using various existing technologies.

Technology-based and efficient industrial developments should be the focus of the government to survive and even maintain sustainability in order to maintain the supply of goods needed by the community. Population concentrations in an area must also be reduced and properly distributed. Big cities are becoming less and less attractive. Efficient production units must be increased in number as well as their distribution should be more even. Outskirts, villages and even mountains are increasingly being enjoyed. The closer to nature or natural resource-based businesses, the more they enjoy it along with the distribution of business locations that is more evenly distributed or not accumulated in big cities. More and more world citizens also want a fairer system in regulating their lives.

Ruminants (sheep, goats and cows) farms are a potential business especially supported by the utilization of leaves waste from these energy plantations. The locations for these energy plantations are generally in forest areas which are quite far from urban areas. The leaves of gliricidia or calliandra can be processed into various forms (concentrate, hay, pellets, briquette, etc.) according to request or use. With the use of good technology, the leaves waste can be used optimally so as to support the progress of ruminant farming. The farm will also be very good if it is made near energy plantations as a source of food. To get a complete feed composition, community empowerment can be done.

Biochar to Increase Biogas Production

Charcoal (biochar) is the raw material for the production of activated carbon. The production of activated charcoal itself goes through two main processes, namely carbonization (pyrolysis) and activation. The surface area of charcoal (biochar) is also smaller than that of activated carbon, but larger than the raw biomass. The carbonization process increases the surface area of the raw biomass. The ratio of surface area between raw biomass, charcoal and activated charcoal is approximately 25 m2 / gram, 200 m2 / gram, 2000 m2 / gram. The larger the surface area of the biomass material that is inserted into the biogas reactor, the greater the penetration of bacteria into the substrate so that the fermentation process that occurs is more perfect so that biogas production will increase. Biochar itself does not participate in fermentation because the main component is stable carbon, while hemicellulose, cellulose and lignin have been decomposed during the carbonization process.

Another example is the addition of biomass briquettes to the biogas reactor, briquetting processs with high pressure and heat also open pores or expand the surface of the biomass, so that biogas production also increases, for more details, read here. The addition of biomass briquettes to the biogas reactor will also increase the C / N ratio, even biochar and activated charcoal have high carbon (C) content.

Charcoal (biochar) has been widely used in the agricultural world to repair damaged soil / soil amendment and thus increase fertility. Good soil fertility will also increase agricultural production. The biochar becomes a home for soil microbes, so that organic materials or compost will break down more completely and be absorbed by plants more as plant nutrients. The charcoal (biochar) pores are the home for these microbes. The more pores, the more microbes will inhabit the biochar as their “house”. The same principle applies to the biogas unit. Another bonus of using biochar is that it absorbs CO2 from the atmosphere, thereby contributing to lowering the greenhouse gases that cause climate change and global warming.

Research in Germany shows that adding 5% biochar to a biogas reactor increases methane production by 5% - based on the dry matter of biochar to the substrate. But when the amount of biochar became 10%, it turned out that no more methane was added. This shows that the optimum condition for adding biochar is the amount of 5%. The microbes in the biochar increase the volume of microbes in the reactor so that the production of biogas or especially methane also increases up to 5%. Biochar itself is not decomposed in the fermentation process. 

Meanwhile, the addition of biomass briquettes per 1 tonne of briquettes will increase biogas production by 400 Nm3. This is because in the biomass briquettes, both cellulose, hemicellulose and lignin have not been decomposed, thus adding to the substrate in the biogas reactor. Whereas in biochar, both cellulose, hemicellulose and lignin have been decomposed during the thermal carbonization process, so there is practically no additional substrate, but only microbial addition occurs in the biochar pores.

The important thing about the addition of biochar is that the compost or digestate produced is of better quality with the addition of the biochar. Biochar will make the compost which is produced as a slow release organic fertilizer. This further encourages biochar production, especially for palm oil companies that care about environmental issues and even strive for zero waste conditions.

Palm oil mills have the potential to apply biogas and biochar units. Solid wastes such as empty bunches and mesocarp fiber can be used for biochar production. Palm oil mills can even replace the furnace in the boiler with a gasifier or pyrolyser. This becomes more profitable because in addition to heat energy being used for production of steam which is used for power generation and sterilization of fresh fruit, biochar will also be produced. The biochar produced is then used to increase biogas production and improve the quality of the compost, as well as a fertilizer mixture in palm oil plantations. And even the potential use of biochar to save fertilizer on large palm oil plantations, for more details can be read here.