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).  

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.