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Technical problems of sewage treatment equipment in food and domestic industry



Source: sewage disposal Author: wushuichuli Date: 2020-02-19 10:06 Browse:

 
Wastewater treatment equipment of food and domestic industry is applied in the wastewater treatment process of bean products processing industry.
AFB (anaerobic fluidized bed)
The anaerobic fluidized bed is filled with fine solid particles, such as quartz sand, anthracite, activated carbon and zeolite. The particle size of filler is generally 0.2 ~ 1 mm. The expansion rate is generally 20% ~ 70%. Because of its high organic matter volume load (27.1 g / L), it has a strong ability to withstand shock load and has good treatment effect. In addition, AFB also has the advantages of short hydraulic retention time, stable operation, not easy to block, and so on. The design parameters of AFB process are: fluidized bed expansion rate 30%, fermentation temperature 35 ℃, fluidization time 10h / D, BOD removal rate ≥ 95.0%, gas production rate 0.50l/g cod (removal), CH4 content in biogas ≥ 65.0%.
ABR (baffled reactor): ABR is similar to several UASB in series, which was proposed by MC Carty and Bachmann in 1982. It is a new type of high-efficiency reactor composed of multiple compartments. Its main characteristics are: ① excellent hydraulic conditions, the flow state of ABR reactor is between push flow and complete mixing; ② strong interception capacity for biological solids; ③ high load, strong treatment capacity, and removal The rate was more than 80%. In the production practice, the COD removal rate and gas production effect of ABR process are good.
Two phase anaerobic fermentation process:
The two-phase anaerobic process is a new type of anaerobic biological treatment process. It puts acid production and methane production into two independent reactors respectively, and the two reactors are connected in series to form a two-phase anaerobic fermentation system to create the best environmental conditions.
The actual operation of two-phase anaerobic fermentation process for bean product wastewater treatment showed that most organic matters were degraded into intermediate products when the hydraulic retention time (HRT) of the acidogenic reactor was 3 h, VFA increased from 300 mg / L to 2000-3000 mg / L, and the effluent entered the methanogenic reactor. The treatment effect of different methanogenic reactors was different.
The above is the food industry sewage treatment equipment for bean products processing industry in the treatment process, if you have related problems can continue to pay attention


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