Using residues, liquid waste from biogas digester as fertilizer for crops

: Sunday - 20/11/2016 22:20  |  Viewed: 1219
In large-scale livestock development, the construction of biogas plants not only addresses the problem of environmental pollution, but also produces a good source of fertilizer for the crop. Recognizing this great benefit, many households in Phuc Hoa commune, Tan Yen district (Bac Giang) have used waste water, biogas waste to irrigate the trees

The garden of lychee of Mr. Hai's family is green thanks to microorganic organic fertilizer from biogas reactor.

Typically, the family of Mr. Nguyen Van Hai at Loi Village, Phuc Hoa Commune, Tan Yen District followed the model with clear effect. In 2003, Mr. Hai began raising pigs for the pig farm and investing in the construction of a 32-m3 biogas reactor to ensure that it does not pollute the environment and be used as a daily fuel. Not only that, his family also uses the source of residue, liquid waste is the composted organic fertilizer after the annealing of gas under biogas pump to irrigate lychee garden. To make full use of this organic fertilizer, Hai has invested in the construction of a liquefied waste water storage system from a biogas reactor with an area of ​​26m3. This bunker not only accumulates liquid waste from the biogas digester but also helps to digest better than the unprocessed amount of waste. In addition, he installed a subterranean irrigation pipeline leading to 8,000 square meters of garden, which helped to make the composting process simple and convenient.

Through the implementation of the model has contributed to the family of Hai reducing 100% NP and NPK, estimated at more than 10 million per year; The evergreen litchi grows strong and durable. On average, his family harvested 11-13 tons of lychee. The quality of the fabric is guaranteed, stable to help his family collect about 200 million / year.

Like Mr. Hai's family, Mr. Nguyen Van Thuan's household, along with Voi village, also applied the model of biogas digester and built 20 m3 of silt and liquid wastes to make fertilizer for crops. Husbandry from 60-70 pigs per year, since 2006 his family built biogas tanks with a capacity of 35 m3, has solved both environmental problems and burning fuel for the family. The amount of organic fertilizer from biogas he used to make fertilizer for 150 root litchi on the area of ​​5,000 m2. Thanks to that, instead of spending an average of five quintals per year, two quintal of nitrogen and 1 quintal of potassium to fertilize crops, the use of microbial fertilizers His family reduced the tens of millions of dollars to buy fertilizer.

Mr. Thuan said that by-product from biogas works in two forms: liquid wastewater, regularly extruded in quantities equal to the amount of manure and waste water loaded into the plant and solid residue, At the bottom of the biogas tank is periodically taken out ... Use directly for plants or mixed with other organic materials to make organic fertilizers, organic microorganism ... rich in nutrients supply For plants are very valuable. Microorganisms when penetrating into the soil will ferment to create a layer of soil porous root of the tree is very easy to thrive. With this soil, people are not afraid of soil because of using inorganic fertilizers.

In fact, many households in Phuc Hoa commune also apply this model for practical efficiency. Most of the fertilizer used in the commune is using biogas digesters. Mr. Tran Duc Hanh, Chairman of Phuc Hoa Commune People's Committee said: There are over 700 households in Phuc Hoa commune with farm size and farm size.

Farmers in the commune have built and used biogas plants to bring about high economic efficiency while protecting the fresh environment. In the time to come, the People's Committee of Phuc Hoa Commune encourages people who have tunnel or are building biogas tunnel should build a tank of waste residue, liquid waste from this system, to avoid indiscriminate discharge into the environment, take advantage Microbial organic fertilizer to irrigate plants in stages.


In order to effectively use biogas from biogas digesters, people should not be concerned to apply fertilizers or feces to the fields and soils that cause too much poisoning. Affect the productivity and quality of plants.


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