Reducing independence on electricity thanks to biogas
While the increasing electricity price and insufficient supply are creating many difficulties for enterprises due to lack of power for production, many farm owners are still at ease thanks to biogas. The proof is that the disposal of agricultural and industrial waste in combination with power generation has been applied quite effectively in many areas.
Success from small scale…
As the most successful province in developing the model of using household scale biogas, up to now, Ninh Binh has had over 1,400 biogas pits for cooking, lighting and production. After three years of implementation, it has been estimated that the amount of saved fuel is 84kg of gas per household per year; the amount of saved electricity is about 50 kWh per month. The whole 1,400 households have saved VND 3.7 billion on gas and more than VND 1 billion on electricity. Each construction with the volume of 6-7 cubic meters costs more than VND 7 million, and the investment capital can be retrieved in just 2 years.
In Phu Tho, only from the fourth quarter of 2009 to the second quarter of 2010, the project "Building energy saving biogas model for household use in the province of Phu Tho” has built 240 biogas pits for households in the area. According to initial calculations, the project has provided an amount of clean energy equivalent to 4.8 TJ per year. This energy source can replace 420 tons of agricultural wastes for cooking, 600 tons of firewood, 60 tons of coal, 11.3 tons of kerosene, 67.5 MWh and 8 tons of liquefied gas. The total amount of saved money is nearly VND 2 billion.
The farm of Mr. Tran Xuan My, Phong Chau town, Phu Ninh district, Phu Tho, has saved 50% of electricity cost and 60% of diesel cost by using biogas generators. His farm is raising 1000 super-lean pigs; he has invested in building two large Biogas pits, a 100m3 pit and a 50m3 pit.
Similarly, Mr. Hoang Van Tam in Tan Thinh village, Hop Thinh commune, Ky Son district, Hoa Binh, has invested in an innovated biogas generator with the capacity of 2.5 KW, creating a great power source for expanding production. After investing in the biogas generator, each month, his family has saved VND 200 - 300,000 on electricity.
According to Mr. Nguyen Quang Khai, Director of the Biogas Technology Center, each household scale biogas construction can run a generator with the capacity of about 15 cubic meters and requires an investment of about VND 8-9 million. With this scale, a peasant family can comfortably use gas for cooking and lighting, and can even use devices with greater capacity, such as televisions, refrigerators, washing machines, water heaters, totally without dependence on grid power supply.
… to biogas in industry
As a closed food processing unit, from slaughterhouse to sausage factory, Duc Viet Foods JSC (Hanoi) is carrying out a project of a breeding complex in combination with the waste disposal system using German biogas technology to produce electricity, heat and fertilizer.
Each year, the slaughterhouse of the company receives about 120,000 marketed pigs. The Biogas plant of the company processes about 100,000 tons of waste per year. The amount of biogas generated from animal waste and other organic agricultural waste can produce 32 million kWh of electricity per year, enough to provide electricity for the entire farm, including systems of pumping, cooling, lighting, heating, sterilizing, cleaning, deodorizing, automatic food providing, drying and producing animal feed ... In addition, the biogas plant can also provide thousands of tons of high quality fertilizer to agricultural production.
Mr. Mai Huy Tan, director of Duc Viet Company, said the company would associate with a Germany company to build a biogas plant for farm waste treatment. The German side shall contribute capital by technologies and equipment, with revenue of CO2 emission reduction targets and retrieve investment capital by reselling this criterion. About the remaining capital, the company will contribute by shareholders’ capital and borrowed capital.
In addition, Duc Viet Foods JSC is also aiming to connect businesses in the Mekong Delta with European businesses to develop a large scale renewable bio-energy project by utilizing the sources of organic agricultural waste.
According to experts, the potential of applying biogas in production and agriculture in our country is still great. Many businesses have saved a large amount of cost thanks to this model, but in fact, the number of businesses interested in energy saving issues is still small. Many businesses are still using very low quality technologies which not only consume a lot of energy and raw materials but also lower product quality and increase prices. Therefore, while electricity price is still increasing, it is very necessary to encourage enterprises to invest in and renovate equipment using energy saving technologies.
By Minh Duc