Ruminant Farming and Post-Mining Reclamation

To fertilize post-mining soil, organic matter or compost is important and much needed. Land or post-mining land is damaged with a very low fertility level so it needs to be processed (treatment) first before it can be planted. The choice of plants depends on the purpose of using the post-mining land, whether for agriculture, forestry or others. Planting fast growing trees and short rotation coppice i.e. legume group trees is the best option. In addition to the ability to survive, its deep roots are also able to withstand erosion and the ability to symbiotic with azetobacter so that it binds nitrogen in root nodules so that it fertilizes the soil. And furthermore, the legume tree can be used as a source of animal feed (the leaves), bioenergy (the wood) and honey (the flowers).

The creation of livestock and their supporters such as forage plantations is like an ammunition factory to reclaim the post-mining land. The wider and faster the target time for reclaiming the land, the larger the farm required. Ruminant farms with thousands or even tens of thousands of livestock can be made with this purpose. Although the main objective is to produce compost for post-mining land reclamation, the indirect benefits from the farm are no less large. Even from the farm business can get big financial benefits. The main and common problem faced by mining entrepreneurs is that they are reluctant to do reclamation because it costs a lot and does not provide financial benefits. But when the reclamation activity does not reduce the company's finances even provide large profit, of course it will be a different story. The volume of mining carried out should also be proportional to the repair or post-mining reclamation.

To maximize the reclamation, biochar needs to be used. The use of biochar will make compost in post-mining land not easily lost after being washed by rain, maintain soil moisture because biochar is able to hold water (water holding capacity), raise soil pH so that soil microbial activity is more optimal and more nutrients are absorbed by plants, and biochar also will become a home or colony for soil microbes so that it will further fertilize the soil. Meanwhile, in terms of climate change mitigation, the use of biochar in the soil will also store carbon (carbon sequestration) for a very long time, up to hundreds of years. Carbon credits with a carbon sink mechanism as part of the CCS (carbon capture and storage) application can also be obtained. The carbon trading market is predicted to get bigger as global awareness of climate change and biochar as one of the solutions are also increasingly being applied, discussed and paid attention to by the earth's population.

The extent of post-mining land that reaches millions of hectares, the high demand for domestic meat as well as the export market, and the large amount of biomass waste that can be converted into biochar, post-mining reclamation should be a priority for mining entrepreneurs moreover, the reclamation activity does not reduce the company's profit but instead gives more profits. If this can be done, the environmental damage caused by mining can be minimized. Indeed, humans need various products that come from the mining to make their lives easier, but also not to the point that on the other hand the mining business actually damages the environment which will lead to disasters in the future.

Bioeconomy in Ex-Coal Mining Land

Bioeconomy is defined as knowledge-based production and uses biological resources or living things to produce products, processes, and services in the economic sector within the framework of a sustainable economic system.

Coal which is a fossil energy with bioeconomy seems to be two contradictory thing. In practice, however, this may not be the case. After the coal deposit is extracted from the bowels of the earth, the land should be reclaimed so that it can be used for bioeconomy. Moreover, in the future era or era of decarbonization, the use of coal will also begin to be reduced due to its bad influence on climate change and global warming. A number of countries have prepared systematic plans for reducing the use of coal and in the future to not use it at all. Indonesia itself is a coal producing country with the third rank in the world (after China and India) with more than 550 million tons of production, which is the largest source of state revenue from the mining sector as well as many environmental problems due to the exploitation of the coal. The ex-coal land should be reclaimed so that it can be used again for productive activities such as agriculture, animal husbandry and forestry. Soil conditions after exploitation should be at least the same as before the coal exploitation. With its tropical climate, the bioeconomic programs should also be easier to carry out.

We are required to continue to learn so that we understand the changing circumstances, then understand the core of the problem so that we can do the best, including providing solutions. Sometimes a problem can be solved quickly, but on the other hand a problem needs a long and continuous solution. Factors of religion, politics, economy and natural conditions are a number of things that influence these changes. The problems of climate change and demographics are examples of problems facing humanity globally today and require gradual and long-term solutions. For the problem of climate change, in particular, a number of efforts have been made and seem to be getting more intensive lately.

In the future era, the combination of economic activities that are environmentally sound, but also capable of providing good economic growth or bioeconomy, with its premise on the safety of the earth, will greatly color human life. The high awareness of environmental problems distinguishes it from the exploitative economy of the past that left massive environmental damage. The financial economy or the financial sector but does not have an impact on the real sector, clearly does not provide benefits, even has repeatedly caused crises or has been proven to damage the economy itself. In more practical terms, the financial sector economy does not create new jobs. The food, energy and human goods sectors must be produced in an environmentally friendly and sustainable manner. For example, bioenergy as the best energy source must be continuously encouraged and improved, for a detailed explanation, read here.

Post-coal mining land is very minimal in nutrients and even acidic, so it needs preparation in the form of special treatment before being used for various purposes. This process can't be fast but also not too long, in a matter of 2-3 years the land should have been able to be used with the condition of the land or soil in good condition even better than before the coal mining activity. In addition to improving the physical and chemical structure of the soil, it is also necessary to add nutrients from organic matter. The use of biochar with its characteristics will be able to improve the physical and chemical properties of the soil, even with the addition of organic matter it will also fertilize the soil better. The biochar will also be able to last for hundreds of years, unlike organic materials that may need to be added periodically to maintain soil fertility. The best organic material for post-coal mining is livestock manure. This makes livestock ideally suited to be integrated into the post-mining reclamation program.

With a land area of ​​​​millions of hectares, the recovery of the post-coal land will provide environmental, economic and social benefits. Of course this is very strategic considering the environmental hazards due to environmental damage can bring much greater natural disasters. Livestock especially ruminants will be the best entry point or “weapon” to start the reclamation by using biochar as a multi-benefit material. After the soil is fertile, any activities related to agriculture, animal husbandry and forestry can be carried out optimally. Biochar in addition to soil improvement also absorbs CO2 gas in the atmosphere so that it is very good for productivity and the environment, especially the climate. Climate change has now become a central and global issue in environmental issues and even the existence of the earth so that the policies of countries in the world take it into account. Raw materials for biochar production are also very abundant, both from plantation industrial waste such as palm oil and from forestry.

One of the tasks of human life according to Q.S. Adz Dzariyat 56 that must be carried out is 'Abdullah (a servant of Allah who is always submissive and obedient to His rules and will and only serves Him). The task of human life is also as the caliph of Allah on earth. This can be understood from the word of Allah in Q.S. Al-Baqarah: 30. Man is the noblest creature among other creatures (Surah al-Isra ': 70) and he/she was made by Allah in the best form/event, both physically and psychologically (Surat at-Tin: 5), and equipped with various potential tools and basic potentials (fitrah) that can be developed and actualized as optimally as possible through the educational process. Because of that, it is proper for humans to carry out the task of being the caliph of Allah on earth. The task of man as the caliph of Allah on earth, among others, involves the task of realizing prosperity on earth (Q.S. Hud: 61). Therefore, the task of caliphate is a sacred duty and a mandate from Allah from the first human to humans at the end of the age to come, and is a manifestation of the implementation of devotion to Him ('abdullah).

Furthermore, Allah SWT also mandates humans to re-establish balance in the universe that has been disturbed by justice (Surah 55:8-9). Currently, when the concentration of greenhouse gases continues to increase in the atmosphere so that the earth's temperature increases, it will cause icebergs at the two poles of the earth to melt, raise sea levels, climate change, to change the concentration of the earth's mass point and shift the earth's north pole. The shift in the earth's poles will affect the circulation of the earth to the earth and so will affect the position of the earth in the universe. What happens if these changes continue or even accelerate? The balance of nature is disturbed, the sun rises from the west and at the end there will be a collision between planets and stars in the solar system and the universe, there will be doomsday. Carbon trading is one of the efforts to reduce these greenhouse gases, and as human awareness continues to increase, the price of carbon or the cost of compensating for CO2 gas has increased recently.

To reduce the earth's temperature, namely by reducing the concentration of greenhouse gases. To reduce 1 ppm concentration of CO2 in the atmosphere is equivalent to absorbing about 15 gigatons of CO2. Meanwhile, the costs required for mitigating major climate change disasters are estimated at USD 1.6 trillion to USD 3.8 trillion annually. To reach the concentration of CO2 in the atmosphere to 350 ppm, it takes about 70,000 biochar the size of the Giza pyramid, assuming that fossil fuels are discontinued. With a Giza pyramid volume of 2.6 million m3 and an average biochar density of 200 kg/m3, the Giza pyramid-sized biochar weighs 520 million kg or 520 thousand tons. Great job of course. Biochar production should grow 5000 times from its current production capacity. With biochar the size of the Giza pyramid unit we need to build 4 pyramids per day (about 2 million tons of biochar per day) for the next 100 years and starting now. And the post-coal mining land is likened to a dead earth, while humans as caliphs on earth are ordered to prosper this earth by fertilizing the soil.