Method for carrying out biochemical treatment on landfill leachate by using circulating upflow sludge bed

Abstract

The invention belongs to a method for carrying out biochemical treatment on landfill leachate by using a circulating upflow sludge bed. According to the method, leachate and industrial starch are completely mixed in a pre-heating mixing pool; the mixed solution is subjected to a circulation reaction in an anaerobic reaction pool, and the mixed solution after the circulation reaction enters the anaerobic reaction pool, and is subjected to a facultative reaction in the next cycle; and an aerobic zone, an anoxic zone and an anaerobic zone are formed in a facultative reaction pool, such that the wastewater circulating in a facultative reactor is periodically in a high dissolved oxygen environment, a low dissolved oxygen environment and an anaerobic environment, and the whole reactor correspondingly forms an aerobic-anoxic-anaerobic alternating process. According to the present invention, with the method, the biodegradability of leachate is improved; and the landfill leachate is subjected to anaerobic digestion treatment by using the intermittent circulating upflow sludge bed anaerobic treatment process, such that the landfill leachate can be subjected to complete acidification treatment at the anaerobic stage, and the difficultly-biodegraded macromolecular organic matters and the ring-shaped organic matters in the landfill leachate can be easily decomposed into easily-biodegraded small molecular chain-shaped organic matters so as to be further degraded by microorganisms.

Description

technical field [0001] The invention relates to the technical field of urban garbage treatment, in particular to a biochemical treatment method for garbage leachate in a circulating upstream sludge bed. Background technique [0002] Sanitary landfill is one of the main methods of urban waste disposal in my country at present, and the leachate produced by sanitary landfill is a kind of toxic and harmful high-concentration organic wastewater. The CODcr concentration of landfill leachate is greater than 10000mg / L, HN 3 -N concentration greater than 3000mg / L, and poor biodegradability. At present, biodegradation + reverse osmosis membrane treatment is mostly used to treat landfill leachate. The biodegradation + reverse osmosis membrane treatment process has small processing capacity, large investment, high operating cost, and difficult operation and management. [0003] At present, there are two methods to deal with the landfill leachate. One is to directly introduce the leacha...

AI Technical Summary

Problems solved by technology

[0002] Sanitary landfill is one of the main methods of urban waste disposal in my country at present, and the leachate produced by sanitary landfill is a kind of toxic and harmful high-concentration organic wastewater. The CODcr concentration of landfill leachate is greater than 10000mg / L, HN 3 -N concentration greater than 3000mg / L, and poor biodegradability

At present, most of the landfill leachate is treated by biodegradation + reverse osmosis membrane treatment method. The treatment system of biodegradation + reverse osmosis membrane treatment process has small processing capacity, large investment, high operating cost, and difficult operation and management.

Images