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System and method for removing natural organic substances and odor-induced substances in micro polluted water

A technology for natural organic matter and slightly polluted water, which is applied in the system field of removing natural organic matter and odor-causing substances in slightly polluted water, can solve problems such as insufficient technical reserves, achieve economical, effective, simple and easy implementation, increase membrane flux, and reduce leakage Effect

Inactive Publication Date: 2011-06-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems and technologies that need to be further studied, including the immature method of efficiently enriching microorganisms that can degrade olfactory substances. The current research focuses on the batch reactor in the laboratory; in actual engineering, the biological filtration process is used The technical reserves for removing olfactory substances are not sufficient, and the research on the long-term operation of biofilter reactors has not been reported yet

Method used

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  • System and method for removing natural organic substances and odor-induced substances in micro polluted water
  • System and method for removing natural organic substances and odor-induced substances in micro polluted water
  • System and method for removing natural organic substances and odor-induced substances in micro polluted water

Examples

Experimental program
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Effect test

Embodiment 1

[0057] (1) The simulated lake water to be treated is self-distributed, and the formula is shown in Table 2. Inoculate microorganisms from Taihu Lake. The microorganisms are mixed microorganisms. They are taken from the sediment on the shore of Taihu Lake in late spring and early summer. After passing through 200 mesh screening, they are directly connected to the biological aerated filter tower. The air aeration pump provides oxygen, the aeration rate is 120-200mL / min, add 1L of BH medium and 500ml of glucose every day, and drain 1L; after 3 weeks, start the biological aeration filter 1,

[0058] The BH medium is composed as follows: NH 4 NO 3 : 1000mg / L, K 2 HPO 4 : 1000mg / L, KH 2 PO 4 : 1000mg / L, MgSO 4 ·7H 2 O: 100mg / L, FeCl 3 ·6H 2 O: 100mg / L, CaCl 2 2H 2 O: 10mg / L;

[0059] Table 2 Self-dispensing water quality formula

[0060]

[0061] (2) Send the slightly polluted source water (influent index see Table 2) to the biological aerated filter tower, the filte...

Embodiment 2

[0065] (1) This step is the same as in Example 1.

[0066] (2) Slightly polluted source water (see Table 2 for water intake index) is sent into biological aerated filter tower 1 by water intake pump 4, and filter tower packing adopts granular activated carbon, and the amount of slightly polluted source water in biological aerated filter tower 1 The hydraulic retention time is 120min, and the gas-water ratio is 1:1. The effluent enters the regulating tank 3, and then enters the ultrafiltration membrane module 2 through gravity. The gas-water ratio in the ultrafiltration membrane module 2 is 16:1. The membrane pore size is 0.01 micron, and the material is a polyvinyl chloride external ultrafiltration membrane module. The flux is 26L / m 2 · h, the pressure changes within 0.01-0.03Mpa. Filtrate for 60 minutes, backwash automatically, and the effluent from the ultrafiltration membrane module enters the clean water pool 15, where it can be sent to the user after being disinfected i...

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Abstract

The invention discloses a system and a method for removing natural organic substances and odor-induced substances in micro polluted water, which belong to the fields of water treatment processes and equipment. The system comprises an aeration biological filter tower, an ultra-filtration membrane assembly and a regulating tank, wherein the bottom of the aeration biological filter tower is connected with the bottom of the regulating tank through a pipeline; the regulating tank is provided with two water outlet passages, namely a direct water outlet passage of the regulating tank and a water passage for connecting the regulating tank and the ultra-filtration membrane assembly; the water outlet of the ultra-filtration membrane assembly is connected with the water inlet of a clean water tank through a water outlet pump. The invention also discloses the method for removing the natural organic substances and the odor-induced substances in the micro polluted water by using the system. The treatment process can simultaneously remove the natural organic substances and 2-methyl isoborneol and geosmin serving as the odor-induced substances in the water, the quality of the discharged water is good, the adding amount of a disinfectant is obviously reduced, and the generation of disinfection byproducts is reduced.

Description

technical field [0001] The invention relates to a water treatment process and equipment, in particular to a system and method for removing natural organic matter and smell-causing substances in slightly polluted water. The invention is a biofilter-ultrafiltration membrane combined process and system capable of simultaneously removing natural organic matter (NOM), olfactory substances 2-methylisoborneol (2-MIB) and geosmin (Geosmin). Background technique [0002] The pollution situation of urban rivers in my country is very serious, and river basins are generally polluted, and it is developing. [0003] Among the 34 lakes in my country surveyed in the 1970s, eutrophic lakes accounted for 5% of the evaluated lake area; the survey results from 1986 to 1989 showed that the eutrophic lake area increased to 35.76%; in the 1990s, the lakes in eastern my country Almost all are in a state of eutrophication. The 2009 China Environmental Status Bulletin shows that the surface water po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 文湘华杨宁宁刘文君黄霞
Owner TSINGHUA UNIV
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