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Method for cutting down adverse effects of nano material on sewage biological denitrification and phosphorus removal system

A nanomaterial, sewage biological technology, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of changing the characteristics of nanomaterials, affecting the application scope of nanomaterials, etc., to achieve easy operation, reduce Adverse effects, effects with significant reduction effects

Active Publication Date: 2013-12-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the doping or modification of nanomaterials will change the characteristics of nanomaterials themselves, which will affect the application range of nanomaterials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The sewage containing nano-zinc oxide to be treated has a COD of 180 mg / L, a TN of 32 mg / L, and a TP of 9.0 mg / L. After being treated by a biological treatment system, the effluent COD is 85 mg / L , TN is 17 mg / L, TP is 19 mg / L;

[0024] (2) Kitchen waste (suspended solids, SS concentration is about 18,000 mg / L) was anaerobically fermented at a temperature of 30 °C and a pH of 9.0 for 6 days, and the concentration of propionic acid (calculated as COD) in the obtained fermentation solution was 1,580 mg / L, the protein concentration (calculated as COD) is 1450 mg / L;

[0025] (3) Add the solution produced by fermentation into the sewage to be treated, so that the concentration of propionic acid in the sewage after adding the fermentation solution is 90 mg / L, and the protein concentration is 75 mg / L;

[0026] (4) After biological treatment of the sewage to be treated, the effluent COD is 80 mg / L, TN is 6.5 mg / L, and TP is 3.5 mg / L; the reduction rates of the adverse eff...

Embodiment 2

[0028] (1) The sewage containing nano-zinc oxide to be treated has a COD of 120 mg / L, a TN of 40 mg / L, and a TP of 8.0 mg / L. After being treated by a biological treatment system, the effluent COD is 65 mg / L , TN is 21 mg / L, TP is 18 mg / L;

[0029] (2) Kitchen waste (SS concentration is about 13,800 mg / L) was anaerobically fermented at a temperature of 50°C and a pH of 11.0 for 8 days, and the concentration of propionic acid (calculated as COD) in the obtained fermentation solution was 1,260 mg / L. The protein concentration (calculated as COD) is 1780 mg / L;

[0030] (3) Add the solution produced by fermentation to the sewage to be treated, so that the concentration of propionic acid in the sewage after adding the fermentation solution is 70 mg / L, and the concentration of protein is 80 mg / L;

[0031] (4) After biological treatment of the sewage to be treated, the effluent COD is 90 mg / L, TN is 8.7 mg / L, and TP is 3.0 mg / L; the reduction rates of the adverse effects of nanomateri...

Embodiment 3

[0033] (1) The COD of the sewage containing nano-silver to be treated is 160 mg / L, TN is 36 mg / L, and TP is 12 mg / L. After being treated by the biological treatment system, the effluent COD is 80 mg / L. TN is 18 mg / L, TP is 25 mg / L;

[0034] (2) The excess sludge (SS concentration is about 19,500 mg / L) from the sewage plant was anaerobically fermented at 45°C and pH 9.0 for 8 days, and the concentration of propionic acid (calculated as COD) in the resulting solution was 1820 mg / L L, the protein concentration (in terms of COD) is 2950 mg / L;

[0035] (3) Add the solution produced by fermentation to the sewage to be treated, so that the concentration of propionic acid in the sewage after adding the fermentation solution is 65 mg / L, and the protein concentration is 70 mg / L;

[0036] (4) After the sewage to be treated is biologically treated, the effluent COD is 85 mg / L, TN is 6.0 mg / L, and TP is 5.0 mg / L; the reduction rates of the adverse effects of nanomaterials on phosphorus re...

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Abstract

The invention belongs to the technical field of environment protection, in particular to a method for cutting down adverse effects of a nano material on a sewage biological denitrification and phosphorus removal system. The method comprises the following steps of carrying out anaerobic conversion on organic wastes to obtain a solution containing propionic acid and proteins; and regulating a carbon source of sewage to be treated by using a solution obtained by fermentation. Thus, the directional adjustment and control of a sewage denitrification and phosphorus removal function microorganism structure is achieved, thereby greatly cutting down the adverse effects of the nano material on a sewage biological treatment process. The method has the advantages of obvious cutting-down effect and the like, and is simple to operate. Under the proper process conditions, due to adoption of the method, the cutting-down rates of adverse denitrification and phosphorus removal effects caused by the nano material are respectively 80% and over 60%.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of water, waste water or sewage, and specifically relates to a method of adjusting the carbon source composition of the sewage phosphorus and nitrogen removal system to realize the directional control of the microbial structure of the sewage phosphorus and nitrogen removal function, thereby reducing the impact of nanomaterials on sewage New approach to adverse effects of biological treatment processes. Background technique [0002] In recent years, nanotechnology has achieved rapid development, and nanomaterials are widely used in various aspects of industrial production and daily life due to their excellent physical or chemical properties. However, nanomaterials will inevitably flow into the drainage collection system during production and use, and will eventually be collected in sewage treatment plants. As we all know, urban sewage treatment plants at home and abroad generally use ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F1/58
Inventor 陈银广郑雄魏媛媛苏应龙
Owner TONGJI UNIV
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