Synchronous nitrogen and carbon removal method for sewage with low carbon-nitrogen ratio

A technology with low carbon-to-nitrogen ratio and carbon-to-nitrogen ratio, applied in the field of synchronous denitrification and carbon removal of sewage with low carbon-to-nitrogen ratio, can solve the problem that the treatment cost is difficult to further reduce, and overcome the shortage of organic carbon sources, aeration volume and aeration The effect of reducing time and overcoming technical bottlenecks

Active Publication Date: 2022-07-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional nitrification and denitrification process needs sufficient carbon source to realize, therefore, the increase of carbon source limits the treatment cost and it is difficult to further reduce

Method used

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  • Synchronous nitrogen and carbon removal method for sewage with low carbon-nitrogen ratio
  • Synchronous nitrogen and carbon removal method for sewage with low carbon-nitrogen ratio
  • Synchronous nitrogen and carbon removal method for sewage with low carbon-nitrogen ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] (1) Configure simulated water inflow

[0077] For MBR, add solutes in deionized water to configure simulated influent with the following components:

[0078] CH 3 COONa 440mg / L, C 3 H 5 O 3 Na 130mg / L, C 7 H 6 O 2 50mg / L, (NH 4 ) 2 SO 4 165mg / L, NaHCO 3 250mg / L, KH 2 PO 4 50mg / L, MgSO 4 ·7H 2 O 50mg / L, ZnSO 4 ·7H 2 O 100mg / L, MnCl 2 ·4H 2 O 30mg / L, H 3 BO 3 300mg / L, CoCl 2 ·6H 2 O 200mg / L, CuCl 2 ·2H 2 O 10mg / L, NiCl 2 ·6H 2 O 10mg / L, Na 2 SeO 3 30mg / L, NH 4 Cl 305mg / L; use 1mol / L HCl solution to adjust the pH range to 7.2-7.6, and use an autoclave to sterilize the simulated influent water.

[0079] For MBfR, the simulated influent was configured by adding solutes in deionized water, with the following components:

[0080] NO 3 - -N 30mg / L, NaHCO 3 250mg / L, KH 2 PO 4 33mg / L, MgSO 4 ·7H 2 O 50mg / L, ZnSO 4 ·7H 2 O 100mg / L, MnCl 2 ·4H 2 O 30mg / L, H 3 BO 3 300mg / L, CoCl 2 ·6H 2 O 200mg / L, CuCl 2 ·2H 2 O10mg / L, NiCl 2 ·...

Embodiment 2

[0104] The anaerobic tank influent of a sewage treatment plant in Guilin is used as the actual influent of the process, and different C / N ratios are achieved by artificially adding ammonia nitrogen (specifically ammonium chloride) and starch to investigate different C / N ratios. The effect of conditions on the simultaneous denitrification and carbon removal of this process.

[0105] At the beginning of the run, the acclimation of MBR and MBfR was initiated separately. In MBR, 250 mL of nitrified sludge that has been domesticated in the laboratory is used as the inoculation source, and the inoculation amount is 10% of the effective volume of MBR; The mixed sludge of the mature hydrogen autotrophic denitrifying bacteria in the chamber was used as the inoculum source in a volume ratio of 2.6:1, and the total inoculum amount was 10% of the effective volume of MBfR.

[0106] In MBR, water feed rate is 1.0mL / min; air diffuser provides oxygen for aerobic nitrification and organic mat...

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Abstract

The invention provides a synchronous nitrogen and carbon removal method for sewage with a low carbon-nitrogen ratio, and belongs to the technical field of water treatment. A membrane bioreactor (MBR) and a hydrogen matrix bio-membrane reactor (MBfR) are coupled, organic matter oxidation and nitration processes (ammoxidation, nitrosation and the like) occur in the MBR, NH4 < + >-N is changed into NO3 <->-N through nitration, and a small amount of NO2 <->-N can be generated by partial incomplete nitration; the MBfR converts NO3 <->-N and NO2 <-> N into N2, bacteria in the MBfR belong to autotrophic bacteria, an organic carbon source does not need to be added, an inorganic carbon source can be effectively utilized, and the disadvantage that the organic carbon source is insufficient can be overcome to a certain extent.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for synchronous denitrification and decarbonization of sewage with a low carbon-nitrogen ratio. Background technique [0002] Organic matter and nitrogen-containing compounds (such as ammonia nitrogen, nitrate nitrogen, etc.) have a wide range of pollution sources. A large number of urban domestic sewage, industrial wastewater, landfill leachate, and agricultural wastewater contain these pollutants. Carbon nitrogen is relatively low. At present, the C / N ratio (m(C) / m(N)) of most urban sewage in my country is between 3.3 and 8.5. [0003] In the prior art, the treatment of low-carbon-nitrogen ratio urban sewage mainly includes physical-chemical method and biological treatment method. Physical-chemical methods include air stripping method, chemical precipitation method, membrane technology method, etc. This technology needs to consume a large amount of chemicals. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/30C02F101/16
CPCC02F3/302C02F2101/30C02F2101/16C02F2203/006Y02W10/10
Inventor 李海翔董堃蒋敏敏郑君健张媛媛陈宇超林华张文杰张学洪曾鸿鹄冯兴会
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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