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

A bio-trickling filtration and bio-film technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., to achieve the effects of reducing surface tension, high removal efficiency, and increasing concentration

Inactive Publication Date: 2014-04-02
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Examples

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific examples.

[0027] In this embodiment, the simulated n-hexane exhaust gas is used as the treatment object of a biotrickling filter (BTF), and a surfactant is used to control the biofilm in the packing layer.

[0028]The device used in this example is a cylindrical reactor. It is mainly composed of cylinder wall, polyurethane sponge packing layer, nutrient solution supply pump and nozzle, supporting sieve plate, gas / liquid inlet and outlet. The main body of the device is a plexiglass tube with an inner diameter of 10 cm and a height of 80 cm. There are three layers of polyurethane sponge packing with a hole diameter of 20 PPI and a layer height of 10 cm. A 10 cm plastic support sieve plate is installed at the bottom of each layer of packing. Evenly spaced 3 mm holes. A height of 10 cm is reserved at the top of the device to adjust the spray height of the nutrient solution. A height of 1...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84
CPCY02A50/20
Inventor 余关龙陈宏杨春平蒋昌波谭万春杜春艳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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