Method for improving capability of linking up with biomembrane of suspension padding

A suspended filler, biofilm technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. Membrane performance, easy operation effect

Inactive Publication Date: 2007-08-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to disclose a simple and efficient method for improving the biofilm-hanging performance of suspended fillers, so as to solve the existing difficulties in membrane-hanging, especially on the same suspended filler, where the film is often not hung on the edge. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Comparison of the biomass improvement and ammonia nitrogen removal effect between the catalytic iron internal electrolysis pretreatment method and the existing suspended packing method.

[0035] Table 1. Shown is the comparison of carrier biomass and system removal effect of ammonia nitrogen in two sets of devices. The two sets of devices were co-cultured for 60 days from the addition of the suspension filler. The microorganisms in device A are cultivated from wastewater pretreated by catalytic iron internal electrolysis, and the microorganisms in device B are cultivated from raw water. Suspension model is ZGL50, external dimensions: Ф30×H100, the wastewater for cultivation is mixed wastewater in chemical industry, there are a lot of organic matter with strong electron-drawing groups in the wastewater, and the measured oxidation-reduction potential is 200mV. The purpose of wastewater treatment is to remove ammonia nitrogen in wastewater, and the concentratio...

Embodiment 2

[0039] Example 2: Comparison of biomass improvement and COD degradation of acidic printing and dyeing wastewater treated with aeration catalyzed iron internal electrolysis pretreatment method and existing suspended packing method.

[0040] The acidic printing and dyeing wastewater of a printing and dyeing factory has an influent oxidation-reduction potential of -110mV, a pH value of 5.6, and a COD concentration of 258mg / L; tests have shown that when the gas-water ratio is 1:1 and the iron consumption is 60mg / L , the pH value can reach 6.9, which is conducive to biological treatment. The processing flow is the same as in Embodiment 1.

[0041] table 3

[0042]

[0043] After the aeration catalyzed iron internal electrolysis pretreatment method, the biomass is greatly increased, and the effect of biochemical treatment is obviously improved.

Embodiment 3

[0044] Example 3: The comparison of biomass improvement and COD degradation between the treatment of alkaline comprehensive dye wastewater by the aeration catalyzed iron internal electrolysis pretreatment method and the existing suspended packing method.

[0045]In the comprehensive dye wastewater in a certain city, the oxidation-reduction potential of the influent water is -200mV, the pH value is as high as 11.5, and the COD concentration is 2158mg / L. Adjust the pH value to 9.5. It has been proved by experiments that when the iron consumption is 55mg / L and the gas-water ratio is 5:1, the pH value can be buffered to 8.8, which is beneficial to biological treatment. After the pH value was adjusted to 9.5, a biochemical comparison test was carried out, and the processing flow was the same as in Example 1.

[0046] Table 4.

[0047]

[0048] Through the aeration catalyzed iron internal electrolysis pretreatment method, the biomass is greatly increased, the biochemical ...

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PUM

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Abstract

The invention relates to a method for waste water biologic treatment, particularly to a method to improve suspension filling biologic membrance coating function. The specific method is to add internal electrolyzing method of catalyzed irom in traditional biologic suspension filling technology to be used as pretreat step of biologic suspension filling technology, different aeration methods are used as high or low of redox potential and pH value of industrial waste water. In the invention, surface modifying is proceeded in waste water treatment needing not to put chemical drug in suspension filling step, internal electrolyzing method of catalyzed iron itselfis used to increase biochemical ability of waste water.

Description

technical field [0001] The invention relates to a method for biological treatment of wastewater, in particular to a method for improving the film-hanging performance of a suspended filler biofilm. Background technique [0002] Wastewater aerobic biological treatment technology is divided into two categories: activated sludge method and biofilm method. The biggest difference between the two lies in the growth mode of microorganisms. The former is suspended growth, and the generation time of microorganisms is restricted by the mud age; the latter is sessile growth, and the generation time of microorganisms is not restricted, so the microorganisms are abundant, and the types of degraded organic matter and The effect is increased; especially for biological denitrification, because nitrifying bacteria are autotrophic bacteria and reproduce slowly, the activated sludge method needs to control a relatively long sludge age, so the effect of the biofilm method is much higher than tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F9/02C02F3/00C02F3/10C02F1/46C02F1/66C02F1/74
CPCY02W10/10
Inventor 马鲁铭赖世华刘剑徐文英周荣丰周增炎
Owner TONGJI UNIV
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