Method for controlling excessive accumulation of biological membranes in biological trickling filter

Abstract

The invention discloses a method for controlling excessive accumulation of biological membranes in a biological trickling filter. The biological trickling filter is inoculated by using active sludge, simultaneously volatile organic compounds are led into the biological trickling filter, a surface active agent is adopted to acclimatize microorganism in packing layers after a normal operation state is reached, the surface active agent is led in a nutrient solution supply tank of the biological trickling filter, a nutrient solution circulating pump enables mixed liquid of nutrient solution and the surface active agent to be sprayed on the surfaces of the packing layers through a sprayer, the sprayed surface active agent sequentially flows through each packing layer from top to bottom so as to moisten, disperse, lubricate and wash the biological membranes, and the biological membranes are discharged from the biological tricking filter through flow scouring so as to achieve the purpose of controlling of the excessive accumulation of the biological membranes in the packing layers. The method can economically and effectively control the excessive accumulation of the biological membranes in the packing layers of the biological trickling filter, keeps operation processes to be performed continuously, cannot interrupt the operation processes and experience a microbial activity recovery stage, can remarkably improve removal performance of organic compounds, especially hydrophobic organic compounds, and has the advantages of being low in long-term operating pressure drop, stable in performance, low in operating cost and easy and simple to operate.

Description

technical field [0001] The invention mainly relates to the technical field of controlling the excessive accumulation of biofilm in the filler of a biotrickling filter when treating low-concentration organic waste gas by a biological method, in particular to a method for controlling the excessive accumulation of biofilm in a biotrickling filter by using a surfactant. Background technique [0002] Gas-phase biological filtration technology has been widely studied and applied for its reliable technology, low cost and environmental friendliness when it is applied in the control of low-concentration volatile organic compounds (Volatile Organic Compounds, VOCs for short). The most mature one is the biological trickling filter, which is mainly through the growth of microorganisms fixed on the filler, and the polluted gas is degraded into CO by it when it passes through the filler layer. 2 、H 2 O and synthetic biofilms. At the same time, the nutrient solution is added by spraying ...

AI Technical Summary

Problems solved by technology

[0010] The problem to be solved by the present invention is: aiming at the technical problems existing in the existing method for controlling the excessive accumulation of biofilm in the biotrickling filter, the present invention provides a method for controlling the excessive accumulation of biofilm in the filler by introducing a surfactant into the nutrient solution. control method