Kitchen waste percolate enhanced treatment method and system

Abstract

The invention discloses a kitchen waste percolate enhanced treatment method. The kitchen waste percolate enhanced treatment method comprises the following steps: (1) enabling kitchen waste percolate wastewater to sequentially enter a grid, an oil separation pool and a preaeration regulating pool; (2) lifting the wastewater to a demulsification pool; (3) enabling the wastewater to enter air floatation equipment; (4) enabling effluent to enter a primary settling pool; (5) enabling the wastewater to flow automatically into an anaerobic ammonia oxidation reaction pool; (6) lifting the wastewater to a forced hydrolysis pool; (7) enabling the effluent to flow automatically into an ABFT pool; (8) enabling the effluent to enter an MBR membrane bioreactor; and (9) enabling the produced water to enter a clean water pool. The invention also discloses a kitchen waste percolate enhanced treatment system. The kitchen waste percolate enhanced treatment system comprises a pretreatment unit, the preaeration regulating pool, the demulsification pool, the air floatation equipment, the primary settling pool, the anaerobic ammonia oxidation reaction pool, the forced hydrolysis pool, the ABFT pool, theMBR membrane bioreactor and the clean water pool. The technology is advanced, the process is reliable and the effluent is stable and reaches the standard.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method and system for intensified treatment of kitchen waste leachate. Background technique [0002] Food waste includes corrosive food waste produced by households, canteens, restaurants, etc. Food waste leachate is mainly produced in the drainage of food waste treatment anaerobic fermentation process. The wastewater is black and is a kind of irregular drainage, organic matter and Typical high-concentration organic wastewater with high concentration of ammonia nitrogen and many impurities and suspended solids is more difficult to treat than domestic waste leachate. The COD content of food waste leachate is as high as 12000-15000mg / l, and they are all untreated organic matter fermented at high temperature, which is difficult to regenerate and degrade. The ammonia nitrogen is as high as 1500-2000mg / l, the total nitrogen is 2000-2500mg / l, and C / The proportion of N is...

AI Technical Summary

Problems solved by technology

50% of Chongqing’s catering industry is in the hot pot industry. Wastewater contains a lot of animal and vegetable oils, prickly ash, and pepper, which will inhibit the growth of microorganisms and make it more difficult to treat.

At present, most kitchen waste leachate adopts two-stage A / O + external MBR process. The traditional A / O nitrification and denitrification process consumes a lot of energy for oxygenation, and the volumetric denitrification efficiency is low, resulting in a large area and high civil construction costs. The MBR membrane has a large circulation volume, high operating costs, and is not resistant to oil, so it has defects in the treatment of high-oil kitchen waste wastewater.

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