Three-level biological purification process for disposing terminal waste water from sugar refinery

Abstract

The invention discloses a three-level biological purification process for disposing terminal waste water from a sugar refinery; a primary treatment is carried out on waste water in an anaerobic organism tank; compound bacteria expanding propagation liquid comprising methane bacillus and anaerobic heterotrophic bacteria which mainly produces hydrogen bacillus is added according to one thousandth of capacity of water in the tank; the secondary treatment is carried out on waste water in an aerobic biological tank which comprises a multi-stage contact oxidation tank and an intensified micropore aeration tank, and compound bacteria expanding propagation liquid comprising rhodospirillum rubrum and colloidal bacillus is added according to one thousandth of capacity of water in the tank; and finally a three-level purification treatment is carried out on waste water in a water planting tank by smilacina atropurpurea. The process combines compound microbes and plants for three-level biological purification treatment on terminal waste water from the sugar refinery, not only leads treated water to completely reach the standard, but also leads purified discharged water to be totally recycled, at least saves water by more than 70%, and leads the removal rate of ammonia nitrogen, total nitrogen and total phosphorus to be more than 70% to 80%.

Description

technical field [0001] The invention relates to the treatment of terminal wastewater in a sugar factory, in particular to a three-stage biological purification process for treating terminal wastewater in a sugar factory. Background technique [0002] Today's world is an era of great industrial development and emphasis on green and environmental protection. Moreover, the faster the industrial development, the more emphasis on energy saving, water saving and emission reduction are the top priorities. At present, most of the wastewater treatment at the end of the sugar factory adopts the activated sludge method, and a few use the microbial method. The activated sludge method requires high investment in facilities and equipment, long cultivation or repair period, and has many disadvantages such as large load and instability. Since the development of the sugar industry, most of the terminal wastewater of sugar factories, whether activated sludge method or simple microbial method...

AI Technical Summary

Problems solved by technology

The activated sludge method requires high investment in facilities and equipment, long cultivation or repair period, and has many disadvantages such as large load and instability.

Since the development of the sugar industry, most of the terminal wastewater of sugar factories, whether activated sludge method or simple microbial method, mostly does not meet the standard of COD in the discharged water after treatment.

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