Industrial device and treatment method for treating coal-gasification ammonia nitrogen wastewater by synchronous nitrification and denitrification

Abstract

The invention discloses an industrial device and a treatment method for treating coal-gasification ammonia nitrogen wastewater by synchronous nitrification and denitrification, belonging to the field of wastewater treatment equipment and process. The industrial device is characterized in that a plurality of aeration tubes (3) are distributed in an aeration tank (1); a settling tank (4) is built on one corner of the aeration tank (1); a mud scraper (5) is arranged in the settling tank (4); a water draining hole (8) and a backflow hole (7) are formed on the tank wall of the settling tank (4); an aeration tank water outlet (6) is formed on the wall above the settling tank (4); a separating wall vertical to the aeration tank (1) and the settling tank (4) is built with a partition wall (2) for dividing the reaction zone of the aeration tank (1) into left and right sides; a wastewater tube (12) outlet, and the backflow hole (7) and the water draining hole (8) of the settling tank (4) are formed at the same side of the partition wall (2); the aeration tank water outlet (6) is formed at the other side of the partition wall (2). The industrial device and the treatment method disclosed by the invention can effectively remove ammonia nitrogen in the wastewater, can shorten reaction time, can improve nitrification and denitrification velocity, and can reduce process structures and capital expenditure.

Description

technical field [0001] An industrial device and method for synchronous nitrification and denitrification treatment of ammonia nitrogen sewage from coal gasification, belonging to the field of sewage treatment equipment and technology, in particular to an industrial device and method for treatment of ammonia nitrogen sewage from coal gasification. Background technique [0002] Generally, all the sewage produced by methanol, butyl-octanol and coal gasification units in chemical fertilizer plants will enter the water supply and drainage plant for treatment. The sewage COD Cr At 300-1100mg / L, the average is 580mg / L, ammonia nitrogen is between 40-179mg / L, with an average of 95mg / L. At present, the methods for treating ammonia nitrogen wastewater mainly include physical chemical method and biological method. Among them, the operation of physical chemical denitrification is complicated, the treatment cost is expensive, and the denitrification by air stripping is easy to cause air ...

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Problems solved by technology

Some researchers use the sequencing batch activated sludge method to treat high-nitrogen soybean product wastewater, and realize nitrous acid-type nitrification and denitrification and simultaneous nitrification and denitrification in the reactor. However, due to the specific mechanism and control of synchronous nitrification and denitrification There is still controversy over the parameters, which limits its application in industrial scale production. Therefore, most domestic research is still in the laboratory stage and has not been put into production.

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