Production of biogas from waste to increase soil fertility
Type: Technologies
Creation: 2018-04-15 09:28 Updated: 2020-01-27 21:32
Compilers: Rustam Ibragimov
Reviewers: Elizaveta Soloveyva, Olga Andreeva, Alexandra Gavilano
Country/ region/ locations where the Technology has been applied and which are covered by this assessment
- Country: Uzbekistan
- Region/ State/ Province: Zangiotinskiy district, Tashkent region
- Further specification of location (e.g. municipality, town, etc.), if relevant: G. Abdullayev farm, farm Milk-agro
- Map: View Map
Description of the SLM Technology
Short description of the Technology
The technology is based on production of biogas from waste as a highly effective environmentally friendly organic fertilizer
Detailed description of the Technology
Currently, the needs of livestock farms in fuel and energy resources are growing. Therefore, their stable energy supply is very important, and it is achieved through the introduction of energy production technologies from renewable sources. In 2015, the government of the Republic of Uzbekistan adopted a resolution to stimulate the construction of biogas plants. According to experts, Uzbekistan has the potential to produce about 9 billion m3 / year of biogas, which is about 10% of the country's annual energy needs (UNDP "Road map for the development of biogas technologies market in Uzbekistan", 2012). Easily degradable organic substances-manure, poultry manure, straw, cotton stems, tree leaves and other organic residues can serve as raw materials for the biogas production. UNDP projects and GEF small grants Programs on the biogas plants use for autonomous energy supply of farms have been successfully implemented in Uzbekistan. The technology of obtaining energy resources and highly effective organic fertilizers was implemented in Milk-agro farm and G. Abdullayev’s farm in Zangiata district in the framework of the UNDP Project "Assisting biogas technologies in Uzbekistan" (2006). The most successful example of biogas production and the use of waste as an organic fertilizer was shown by the farm "Nadezhda" in the Khavast district of the Syrdarya region. The biogas plant, launched as part of the GEF SGP pilot project (2010), provides electricity to the livestock complex and valuable organic fertilizer to forage crops fields. Biogas production technology is especially important for medium-sized farms due to their own energy supply and soil enrichment with humus. The decline in soil organic matter in recent decades has led to a decrease in the quantity and quality of soil biota, which has become one of the reasons for the decline in soil fertility. Concentrated organic fertilizer is obtained during the process of biogas production, without weed seeds and pathogenic microflora. It contains 2-4 times more basic nutrients than in conventional organic fertilizers, as well as humic acids, plant growth stimulants, vitamins and amino acids.
Costs of inputs needed for establishment:
Animal waste products are collected daily in special containers and then sent to the reactors. Organic fertilizers are stored for 7-10 days at a temperature of 38-40 C, so all bacteria and seeds of various herbs die. Therefore, the use of biofertilizers can further reduce the cost of weed control. Liquid waste diluted with water in a ratio of 1: 20 is used as a top dressing for plants. The rate of application is 1 t / ha per season.
The cost of an average individual Biogas plant (30 m3) ranges from 15,000 to 180,000 USD. The payback period is about 3-7 years. The larger the Biogas plant, the higher its profitability and shorter payback period. Savings due to the use of biofertilizer is 84 USD / ha. The use and sale of biofertilizer is the main source of income from the Biogas plant in the farm "Nadezda". Increasing farmland productivity will provide fodder for personal livestock, and will allow the sale of surplus silage, alfalfa, corn and feed wheat for an average of 1,600 USD per year.
Photos of the Technology
- 📍 2009. the farm "Milk Agro", Tashkent region, Zangiotinskiy district
- 📷 http://www.cacilm.org/docs/Tehnologii%20i%20podhody%20UUZR-SLM%20technologies%20and%20approaches_ru.pdf