Breeder quot; Concrete biogas reactor

Molded biogas from concrete is preferred by farmers

According to Mr. Viet, each construction team of concrete biogas plant usually has 3 people. Each month, one team can complete 4 works. Upon receipt of the order, the construction team will carry the molds in steel, then assembled and then poured concrete. This process takes about 3 days. While waiting for the cement mix, the sand is dry hard, the nest can remove the mold, move to other breeders to mold boigas. A few days later came back to strike down the tunnel (this process took about a day) and poured concrete layer at the bottom of the tunnel.

The brick and composite biogas tunnels are usually spherical. But the concrete biogas reactors are cylindrical (hollow bottoms), with the top forming a closed dome (only a circular hole that attaches the gas pipeline to the top). They work according to the principle of condensation, which is like a wine pot. The tunnel height is 2.7m, 2.6m in diameter.

Mr. Viet said that the Nam Dinh people like concrete biogas tunnel, because the land in the Red River Delta is weak and unstable. The brick building has a thickness of only 5cm, if the vibration, subsidence will be very easy to crack. In addition, composite materials, despite good bearing capacity, but whether after a dozen years, they have stable operation? That farmers have not verified.

Works ... eternal

The concrete biogas reactor has the advantage of being able to construct all the ground. Besides, the tunnel walls have a thickness of 10cm, the inside of the steel reinforcement should be very good. If they say they have eternal life, they are not. Currently, all samples of concrete biogas plant installed in Y Yen district (Nam Dinh) have the volume of 13m3. The cost of each tunnel costs about 11 million VND (if implemented locally). Compared to the investment in a brick or composite biogas plant, concrete biogas is not expensive. Nguyet Ha village has 97 households, of which 30 are breeding households. At present, 100% of households choose biogas tanks.

Do Thi Huong, 42 years old (Yen Loi commune) regularly breeds 7 sows and about 30 piglets. She invested in concrete biogas tunnel for 8 years. Up to now, the work still works well, the gas is very uniform and green. She used to cook pigs and cook daily for very effective.

Exchanging with us, many people in Yen Loi and Yen Tan commune expressed their wish to receive VND 3 million support from LCASP project if they invest in concrete biogas tunnel. However, according to Nguyen Trong Tan, Deputy Director of Nam Dinh Department of Animal Husbandry and Veterinary, the LCASP project has not yet verified and put the concrete biogas tunnel into the program to support 3 million VND / . Because this model has not been recognized for technical progress.

In fact, the concrete biogas reactor works very well, almost without problems of gas leakage and longevity. However, up to now it is unclear who the author of this tunnel. Teams of executives, although very experienced, do not have the qualifications to document new technical advances.

"We are very much looking forward to agencies, units and research institutes of the Central to carry out research projects on the efficiency of concrete biogas tunnel, then recognize new technical progress. The LCASP project will review and negotiate with partners to bring this tunnel into the support program to meet the wishes and aspirations of the people, "said Tan.