A method for preparing methane from pineapple dregs or mango dregs through anaerobic fermentation
A technology of anaerobic fermentation and pineapple pomace, applied in fermentation, waste fuel and other directions, can solve problems such as the influence of gas production, increase the volume of fermentation tank, etc., and achieve the effect of reducing investment budget and operating costs
Pending Publication Date: 2017-12-15
CHENGDU DETONG ENVIROMENT ENG
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Abstract
A method for preparing methane from pineapple dregs or mango dregs through anaerobic fermentation is provided. The method includes (1) weighing biogas liquid of a biogas project adopting kitchen waste as a raw material, adding the pineapple dregs or mango dregs into the biogas liquid, with the solid-liquid mass ratio being controlled to be 6:100, and the ammonia nitrogen concentration being controlled to be about 2000 mg/L, adjusting a pH value with ammonia water to 8.5-9.0, and performing anaerobic fermentation at a maintained fermentation temperature of 35 DEG C for 60 days to obtain an inoculum; (2) subjecting the product of the step (1) to solid liquid separation to obtain a liquid supernatant and a precipitate, controlling the ammonia nitrogen concentration of the liquid supernatant to be 1500-3300 mg/L, blowing the precipitate with a small amount of the liquid supernatant to fully disperse the precipitate, and mixing the liquid supernatant the ammonia nitrogen concentration of which is adjusted and the dispersed precipitate; and (3) adding the pineapple dregs or mango dregs into the mixture with the TS% being controlled to be 1-4%, and performing fermentation. The method does not need independent acidification pretreatment, and can ensure successful biogas fermentation under conditions of enough volume loads and no increase of the volume of a fermentation tank. The method does not need a special additive.
Application Domain
Waste based fuelFermentation
Technology Topic
BiogasSal ammoniac +7
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