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Construction of rural biogas project of building a new socialist countryside, improve the quality of life of farmers, improve rural production, optimize the structure of rural energy, protect the ecological environment in rural areas, will play an active role in promoting. Methane fermentation process parameters on gas production of biogas fermentation process parameters is the key to efficient production of biogas. In addition, biogas slurry and the biogas residue is a high quality organic fertilizer, can significantly improve the soil ecosystem and structure, increase soil fertility, effective regulation of the water in the soil, fertilizer, gas, heat, and promote the virtuous circle of soil ecological environment. This test simulates rural hydraulic digester works by homemade biogas fermentation device from the actual needs, research the different fecal grass than inoculum inoculum size, heap ret approach three important factors that affect biogas fermentation impact on the effect of the gas production. In addition, through an integrated technology test, get the retting process, different manure grass than the best combination of the four factors of the different ratio of raw materials and the inoculum size of the inoculum. Set of four different fecal grass than treatment, study dung grass than the effect of the gas production. The results show that the carbonitride than uncertain circumstances, the total solids concentration of the raw material has a rating of 8%, the pH value is between 6.8 ~ 7.4, amount of inoculation digester sludge was 20% of the dry weight of the raw materials of the fermentation period 30d, the best pure pig manure in the total gas production, average daily gas production, tank volume rate of gas production, expected capacity of the gas production rate and raw gas production rate reached 88851.84mL 2961.73mL 0.4527m 3 / m the 3 · d 0.5328m 3 / m 3 · d, and 0.1999m 3 / kg · TS, than dung grass than for the 2:1 processing, respectively, 41.61%, 41.61%, 41.56%, 41.63% and 41.67%, respectively. N ratio under certain circumstances set three different manure grass processing, to study the effects of gas production. The results show that the carbonitride than certain circumstances, the total solids concentration of the raw material is 8%, the pH value is between 6.8 ~ 7.4, amount of inoculation digester sludge was 20% of the dry weight of the raw materials, the fermentation period 30d, N ratio of 2:1, the best treatment effect in the total gas production, average daily gas production, tank volume rate of gas production, expected capacity of the gas production rate and raw gas production rate reached 56662.28mL, 1888.74 mL, 0.2888 m 3 / m 3 · d, 0.3398m 3 / m 3 · d and 0.1274m of 3 / kg · TS, the ratio 3:1 treatment than manure grass has greatly improved, respectively, 30.29%, 30.29%, 30.27%, 30.29% and 30.27%. Set a different gradient, to study the impact of the inoculum size on the effect of gas production by inoculation amount of digester sludge. The other conditions of the test for: raw total solids concentration of 8%, refueling interval to 7d, the pH value is between 6.8 ~ 7.4, the fermentation period was 30d, the digester sludge inoculation amount was 10%, 20% and 30%. The results show that, under the experimental conditions of the test, vaccination of 30% of the digester sludge effect on fermentation feedstock the best total gas production of biogas, the average daily gas production, gas production rate of pool capacity, expected capacity of gas production rate and The raw gas production rate reached 37873.60mL, 1262.45 mL, the 0.1930 m 3 / m 3 · d 0.2271m 3 / m 3 · d, 0.0852m 3 / kg · TS, than the digester sludge treatment inoculated with 20% and 10% of the total gas production increased 44.81% and 174.49%, respectively, pool volume rate of gas production increased 44.81% and 174.49% the material capacity gas production rate increased 44.79% and 174.54%, raw gas production rate of 44.90% and 174.84%, respectively. Different the retting way affect the efficiency of the methane fermentation. Of the trials in the fermentation the the raw total solids concentration of 8%, the refueling interval for 7 days, pH values ??between 6.8 and 7.4, the fermentation period 30d of raw materials were used outside the pool retting pool retting and non-retting three treatments. The results show that, the the pool heap ret approach works best, its total gas production of biogas, the average daily gas production pool capacity gas production rate, the expected capacity of the gas production rate and raw gas production rate respectively 56662.28mL of 1888.24mL, 0.2887m 3 / m 3 · d, 0.3397 m 3 / m 3 · d and 0.1274 m 3 / kg · TS, than retting processing increased by 31.63%, 31.63%, 31.11%, 31.11% and 31.20%. In addition, the paper also carried retting process including raw materials for fermentation, inoculum vaccination, fecal grass ratio and the ratio of raw materials to these four rural home just methane fermentation process larger factor test, each factor set three levels: heap ret approach including outside the pool retting process, pool retting process and not retting dung grass than for 2:1,2.5:1 and 3:1 molar ratio of pig manure straw, pigs fecal corn straw and pig manure grass inoculum inoculum size of 10%, 20% and 30%, L 9 (3 4 ) orthogonal design, raw total solids concentration of 8%, solid to liquid pH value between 6.8 and 7.4, the fermentation period was 30d. The results show that the impact of the four factors in the trial of biogas production fire small: the ratio of raw materials> fecal grass than> inoculum inoculum size> retting method. Combination of optimum theory: no retting, inoculum size 30%, fecal grass than 3:1, the fresh swine manure grass, the the actual best combination is to: retting tanks, inoculum size 30%, fecal grass than 3 : 1, fresh pig manure grass. Depending on the fermentation conditions and requirements in the production practice application which combination to choose. In addition, the experimental biogas fermentation residue and biogas residue samples collected in Shapingba District, Hechuan, Fuling District 11 households, and its the nutritional performance analysis and safety performance analysis found that biogas slurry and biogas residue rich in organic matter, but also contains nitrogen, phosphorus, potassium, sodium, calcium, copper, iron, magnesium, manganese, and zinc and other trace elements, plays an important role to promote crop growth, improve the quality of agricultural products. Finally, The the fermentation feedstock retting time is an important factor affecting methane fermentation, it is recommended that the test conditions further screening; evaluation of main chemical ingredient of anaerobic fermentation residues and suggested using a variety of evaluation methods.
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