Method of processing high concentration organic wastewater

Abstract

The invention relates to a method of processing high concentration wastewater of waste incineration plant leachate, resin wastewater, printing and dyeing wastewater, etc. Wastewater collected in a regulating pool is transported to a two-fluid nozzle in a mixer tube. The wastewater passing by the two-fluid nozzle forms negative pressure in a primary disturbed area of an air entrance of the two-fluid nozzle. Air is absorbed into the two-fluid nozzle. Mixture of the air and the wastewater in high velocity is ejected from the two-fluid nozzle; outlet water in a reacting area of an injection annular biochemical reactor is transported into a secondary sedimentation tank. Supernatant obtained after the sedimentation of the secondary sedimentation tank is transported out to a middle water pool. Active sludge which precipitates on the lower part of the secondary sedimentation tank refluxes into the injection annular biochemical reactor. Ultrafiltration clear liquid obtained from clear liquid in the middle water pool which is treated by an ultrafiltration system is transported to a nanofiltration system. Fester obtained from the ultrafiltration clear liquid which is discharged into the nanofiltration system and is deeply treated by the nanofiltration system refluxes to the regulating pool. Obtained clean water reaching the standard is discharged or collected to be recycled.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating high-concentration organic waste water such as leachate, resin waste water and printing and dyeing waste water of a waste incineration plant. Background technique [0002] With the rapid development of China's economy and the continuous improvement of people's living standards, the output of urban domestic waste in China has also increased rapidly. etc. have great advantages. Since China's primary domestic waste is typically characterized by high moisture content and high organic matter content, it is collected in a mixed manner and has a relatively low calorific value. When dealing with garbage by incineration, fresh garbage must be stored in the garbage storage pit for 3-5 days for fermentation and maturation, so as to achieve the purpose of leaching out water and increasing the calorific value, so as to ensure the normal operation of the subsequent in...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: 1. The treatment process is complicated and the investment is high; 2. The disc-type reverse osmosis system is used in the treatment, and a high-pressure pump must be used, which has high energy consumption and frequent replacement of the disc-type reverse osmosis membrane. The problem

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