High-salinity and high-ammonia-nitrogen-concentration wastewater treatment method based on MBR

A treatment method and technology of ammonia nitrogen concentration, applied in water treatment parameter control, biological water/sewage treatment, special chemical compound water treatment, etc.

Pending Publication Date: 2021-11-05
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method for treating wastewater with high salinity and high ammonia nitrogen concentration based on MBR, which overcomes the technical problem of poor effect of traditional technology in treating wastewater with high salinity and high ammonia nitrogen concentration, and the cultured nitrifying bacteria have high salinity resistance , Strong ability to withstand high ammonia nitrogen concentration. This treatment method can efficiently treat wastewater with an ammonia nitrogen concentration of 1000mg / L and a salt concentration of 40g / L. The ammonia nitrogen removal rate of the effluent meets the national urban sewage discharge level A standard

Method used

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  • High-salinity and high-ammonia-nitrogen-concentration wastewater treatment method based on MBR

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preparation example

[0036] A kind of trace element concentrated solution is prepared by the following method: 0.5g H 3 BO 3 , 0.5g ZnCl, 0.5g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 0.5g NiCl 6H 2 O, 0.5g AlCl 3 ·6H 2 O, 0.5g CoCl 2 ·6H 2 O, 0.5g CuSO 4 ·5H 2 O, 2g Fe 2 (SO 4 ) 3 , 1gMnCl 2 4H 2 O, 5gMgSO 4 ·7H 2 O. 5mL of 37wt% HCl solution was all dissolved in 1000mL of water to obtain a trace element concentrate.

Embodiment

[0038] A treatment method for wastewater with high salinity and high ammonia nitrogen concentration based on MBR, using a submerged MBR membrane bioreactor with a total volume of 13.5L and an effective volume of 10L, and the membrane material is a hollow polyvinylidene fluoride fiber membrane (pore size 0.03 μm, membrane inner diameter 1.0mm, outer diameter 2.2mm, membrane area 0.235m 2 ), the outlet of the membrane module communicates with the suction pump through the pump tube to realize constant flow of water, and a pressure sensor is installed between the membrane module and the suction pump to record the change of the transmembrane pressure of the membrane module in real time during operation. The processing method specifically includes the following steps:

[0039] S1. Start-up stage: control the conditions required for equipment start-up and the alkalinity required for wastewater, start the MBR reactor, use artificially simulated wastewater, and control the influent con...

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Abstract

The invention discloses a high-salinity and high-ammonia-nitrogen-concentration wastewater treatment method based on MBR, and relates to the field of wastewater treatment. The treatment method comprises the following steps that the salt concentration of inlet water is controlled to be 0w / v%-1w / v% of wastewater, the ammonia nitrogen concentration is controlled to be 0w / v%-0.003 w / v% of the wastewater, and conditions required for starting equipment and alkalinity required for nitration reaction are controlled; the salt concentration of the wastewater is controlled to be kept unchanged, the ammonia-nitrogen concentration of the inlet water is sequentially increased in stages, and the final ammonia-nitrogen concentration of the inlet water increased in stages at least reaches 0.1 w / v% of the wastewater; and the ammonia nitrogen concentration of the wastewater is controlled to be kept unchanged, the influent salt concentration is sequentially increased in stages, and the final influent salt concentration increased in stages at least reaches 4 w / v% of the wastewater. Nitrifying bacteria cultured in the invention have the characteristics of high salinity resistance and high ammonia nitrogen concentration resistance, and can efficiently treat wastewater, the ammonia nitrogen concentration reaches 1000mg / L, the salt concentration reaches 40g / L, and the effluent meets the national standard.

Description

technical field [0001] The present invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater with high salinity and high ammonia nitrogen concentration based on MBR, which utilizes MBR to cultivate and enrich nitrifying bacteria resistant to high salinity and high ammonia nitrogen concentration to treat high salinity, high ammonia concentration wastewater. Wastewater with high ammonia nitrogen concentration is in line with the concept of biological environmental protection. Background technique [0002] Ammonia is widely used in industry as an important raw material, resulting in high concentrations of ammonia nitrogen in some industrial wastewater. Petrochemical, pharmaceutical, coking, synthetic ammonia and tanning fields will produce a large amount of high-concentration ammonia nitrogen wastewater in the production process, and the ammonia nitrogen concentration of some wastewater can reach 1000mg / L. [0003] Anae...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/34C02F101/16
CPCC02F3/1268C02F3/34C02F2101/16C02F2203/006C02F2209/07C02F2209/02C02F2209/05C02F2209/22C02F2209/08C02F2209/18C02F2209/14C02F2209/44C02F2303/14C02F2305/06Y02W10/10
Inventor 王铸许怀浩邓岳鹏李秀英黄爽秋胡春
Owner GUANGZHOU UNIVERSITY
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