Multi-chamber composite biological carrier and method for treating fixed-bed gasification wastewater

Abstract

The invention relates to treatment methods for fixed-bed gasification wastewater and particularly relates to a multi-chamber composite biological carrier and a method for treating the fixed-bed gasification wastewater. The multi-chamber composite biological carrier for treating the fixed-bed gasification wastewater comprises an outer frame, a rotary plate, a first slave frame, a second slave frame, embedded carriers, large-pore-size porous carriers and small-pore-size porous carriers, wherein the outer frame, the rotary plate, the first slave frame and the second slave frame are all net structures. According to the multi-chamber composite biological carrier provided by the invention, advantages of a fixed-bed biological membrane technology and advantages of a moving-bed biological membrane technology are combined, and an aerobic environment and an anoxic micro-environment are reasonably constructed, so that the loss of predominant bacteria is prevented, the caking, wearing and blocking among the carriers are avoided, and total phenols, ammonia nitrogen, total nitrogen and COD are synchronously removed.

Description

technical field [0001] The invention relates to a treatment method for fixed-bed gasification wastewater, in particular to a multi-chamber composite biological carrier and method for treating fixed-bed gasification wastewater. Background technique [0002] At home and abroad, the process route of pretreatment + biological treatment + advanced treatment is generally used to treat fixed bed gasification wastewater. The wastewater after pretreatment by dephenolization and ammonia distillation still contains high concentrations of ammonia nitrogen, total phenols and COD. These pollutants need to be passed through biological The existing biological treatment technologies include activated sludge method and biofilm method. Activated sludge method can remove phenolic compounds and COD, but nitrifying bacteria are easily inhibited, nitrification is unstable, hydraulic retention time is long, and sludge bulking is prone to occur. The biofilm method has a strong ability to resist imp...

AI Technical Summary

Problems solved by technology

Activated sludge method can remove phenolic compounds and COD, but nitrifying bacteria are easily inhibited, nitrification is unstable, hydraulic retention time is long, and sludge bulking is prone to occur

The biofilm method has a strong ability to resist impact loads and a small amount of mud production, but the cost of conventional carriers is high, the service life is short, and it is difficult to effectively control the anoxic zone

For example, the patent 201010117070.7 "a suspension-type biological carrier integrating short-range nitrification and denitrification and its manufacturing method" provides a mesh-like sponge made of high-molecular polymer materials, allowing aerobic nitrosating bacteria Coexist with facultative denitrifying bacteria on the same biological carrier, but this type of carrier is difficult to effectively control the number of facultative denitrifying bacteria, the removal effect of total nitrogen is not stable, and a large number of suspended carriers are crowded with each other during the aeration process Friction, limited service life

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