After second days of feeding, the barometer can be observed, which indicates that the gas has been produced. Initially, the gas will be released (until the barometer down to zero), when the barometer rises again, the ignition on the stove, if ignited, indicating that the methane pool has been activated. If you can not ignite, according to the above method and then try again, but also not, it is necessary to check whether the methane liquid acidification or other reasons.
How to prepare biogas fermentation raw materials?According to the raw material and the feeding mode, the fermentation of biogas in rural areas is mainly based on two kinds of fermentation methods, namely, the one time feeding of straw and the continuous feeding of livestock manure. Now a way to illustrate.China's rural households in the general construction of 6 cubic meters of water pressure digesters, the effective volume of about 5 cubic meters of fermentation. Because the dry matter content of different kinds of livestock and poultry manure is different, the pig manure is taken as an example.Pig manure dry matter content is 18%, the fermentation concentration should be about 6% of the south, you need 1200 kilograms of pig manure, inoculum prepared 500 kg (as the inoculum of dry matter content and pig manure as, add water 3300 kg); the fermentation concentration should be around 8%, to about 1700 kilograms of pig manure, inoculation preparation of 500 kilograms, add 2800 kg of water, in the fermentation process due to methane pool and pen, toilet repair together, can be self feeding.
How to feed methane fermentation?After checking the sealing performance of the methane tank can meet the requirements can be fed. The methane tank feeding, first according to the requirements of article twenty-fifth of the fermentation liquid concentration calculated water injection, quantitative water to the pool, will prepare the raw material first pour half, stir, then pour half of the inoculum and the raw materials are mixed evenly, according to this method, the raw material and the strain in the pool to fully mix net, digester sealing.
In order to make the normal start of the methane tank, first of all, to choose a good feeding time, and then ready to match the appropriate fermentation raw materials into the pool after the raw material mixing to be uniform, water seal cover to seal tight.
