Anaerobic fermentation biogas slurry treatment method and device
A biogas slurry treatment and anaerobic fermentation technology, applied in fertilization devices, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of environmental pollution, waste of water resources, low nutrient concentration, etc. The effect of pollution, energy saving, good economic and social benefits
Inactive Publication Date: 2019-05-10
自贡佳禾新能源科技有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide an anaerobic fermentation biogas slurry treatment method and device to solve the problems in the prior art that the concentration of nutrients in the biogas slurry is low, excessive discharge of biogas slurry causes environmental pollution and waste of water resources
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[0032] Such as figure 1 As shown, an anaerobic fermentation biogas slurry treatment device includes a purification tower 1, a biogas slurry heater 2, a defoaming tank 3, a buffer tank 4, a biogas slurry cooler 5, a gas-liquid separation tank 6, a membrane separator 7, Vacuum pump 8, the upper part of the purification tower 1 is provided with a raw material inlet, the upper part of the purification tower 1 is connected to the top of the biogas slurry heater 2, the lower part of the purification tower 1 is connected to the lower part of the biogas slurry heater 2, the top of the purification tower 1 is connected to the digester The bottom of the bubble tank 3 is connected; the top of the defoaming tank 3 is connected to the upper part of the buffer tank 4, and the bottom of the buffer tank 4 is connected to the upper part of the purification tower 1; the biogas liquor cooler 5 is provided with a cooling medium inlet and a cooling medium outlet , gas inlet, gas outlet and liquid ...
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The invention relates to the field of sewage treatment and discloses an anaerobic fermentation biogas slurry treatment method and device. The method specifically includes following steps that biogas slurry from an anaerobic fermentation tank is added into a purifying tower, the purifying tower is heated for purifying to convert liquid into secondary steam, and the secondary steam enters a defoaming tank from the top of the tower and then enters a buffer tank; (b), liquid in the buffer tank returns into the purifying tower, gas enters a membrane separator, the secondary steam enters a biogas slurry cooler after ammonia nitrogen in the secondary steam is separated, and condensate water condensed in the biogas slurry cooler returns into the anaerobic fermentation tank for cyclic use. Biogas slurry is concentrated under pressure of 0.06-0.07MPa, ammonia nitrogen content of the condensed condensate water is lower than 5mg / L, and the biogas slurry can be directly recycled for anaerobic fermentation without having impact on gas generation effect. Energy consumption is saved by higher than 50% when compared with existing biogas slurry concentration treatment modes, the whole treatment process is free of resource waste and emission of wastewater and waste gas not up to standards, environment pollution is reduced, and the method has good economic benefit and social benefit.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for anaerobic fermentation biogas slurry. Background technique [0002] With the improvement of people's living standards in our country, the large-scale livestock and poultry breeding industry has developed rapidly and produced a large amount of breeding manure. At present, anaerobic fermentation process is mostly used in China to treat these manure, which effectively reduces the primary pollution of farm manure. But not all manure treated by anaerobic fermentation process can be fully utilized. Due to the different areas of the breeding sites, the treatment method that can completely consume the treated wastewater can only be applied to livestock and poultry sites with appropriate farmland, fish ponds or aquatic plant ponds around them, and the overall system arrangement of ecological agriculture environment. Most farms do not have sufficient conditions and ...
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IPC IPC(8): C02F9/10C05F7/00C02F101/16
CPCY02A40/20Y02E50/30
Inventor 曹礼铭李非露宋雨
Owner 自贡佳禾新能源科技有限公司