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High-salinity high-organic-matter contentwastewater zero discharge method

A technology of organic matter and zero discharge, applied in energy wastewater treatment, chemical instruments and methods, water pollutants, etc., can solve optimization and other problems, achieve light membrane pollution, solve difficult problems, and reduce membrane pollution.

Inactive Publication Date: 2016-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the patent also involves a zero-discharge method for high-concentration wastewater, the zero-discharge process flow of the patent fails to optimize each process

Method used

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  • High-salinity high-organic-matter contentwastewater zero discharge method

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Experimental program
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Embodiment 1

[0095] See the process diagram figure 1 . The water quality characteristics of the high-salt and high-organic wastewater in this embodiment are: wastewater pH 7, conductivity 3000 μs / cm, COD cr 200mg / L, BOD100mg / L, total hardness (CaCO 3 )800mg / L, SS500mg / L, NH 4 -N50mg / L;

[0096] Such as figure 1 As shown, the process of treating the high-salt and high-organic wastewater using the method of the present invention is as follows:

[0097] (1) Submerged membrane bioreactor: The high-salt and high-organic wastewater enters the submerged membrane bioreactor unit for filtration treatment to remove most of the suspended matter and organic matter in the high-salt and high-organic wastewater, and then passes through the immersed membrane bioreactor After the units are separated, the water produced by the membrane bioreactor is then processed in step (2). The submerged membrane bioreactor system regularly discharges mud for drying treatment.

[0098] Among them, the submerged membrane bio...

Embodiment 2

[0111] See the process diagram figure 1 . The water quality characteristics of the high-salt and high-organic wastewater in this embodiment are: wastewater pH 7.2, conductivity 4000 μs / cm, COD cr 1000mg / L, BOD500mg / L, total hardness (CaCO 3 )900mg / L, SS700mg / L, NH 4 -N300mg / L;

[0112] Such as figure 1 As shown, the process of treating the high-salt and high-organic wastewater using the method of the present invention is as follows:

[0113] (1) Submerged membrane bioreactor: The high-salt and high-organic wastewater enters the submerged membrane bioreactor unit for filtration treatment to remove most of the suspended matter and organic matter in the high-salt and high-organic wastewater, and then passes through the immersed membrane bioreactor After the units are separated, the water produced by the membrane bioreactor is then processed in step (2). The submerged membrane bioreactor system regularly discharges mud for drying treatment.

[0114] Among them, the submerged membrane...

Embodiment 3

[0127] See the process diagram figure 1 . The water quality characteristics of the high-salt and high-organic wastewater in this embodiment are: wastewater pH 7.5, conductivity 5000 μs / cm, COD cr 2000mg / L, BOD1000mg / L, total hardness (CaCO 3 )1000mg / L, SS1000mg / L, NH 4 -N500mg / L;

[0128] Such as figure 1 As shown, the process of treating the high-salt and high-organic wastewater using the method of the present invention is as follows:

[0129] (1) Submerged membrane bioreactor: The high-salt and high-organic wastewater enters the submerged membrane bioreactor unit for filtration treatment to remove most of the suspended matter and organic matter in the high-salt and high-organic wastewater, and then passes through the immersed membrane bioreactor After the units are separated, the water produced by the membrane bioreactor is then processed in step (2). The submerged membrane bioreactor system regularly discharges mud for drying treatment.

[0130] Among them, the submerged membr...

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Abstract

The invention relates to the field of industrial wastewater treatment, and specifically relates to a high-salinity high-organic-matter content wastewater zero discharge method. According to the invention, the high-salinity high-organic-matter content wastewater is treated with submerged membrane bioreactor treatment, nano-filtration, high-efficiency reverse osmosis, membrane distillation, and evaporation crystallization. Most of the suspended solids and organic matters in the wastewater are removed with the submerged membrane bioreactor; hardness matters such as multivalent ions, and part of the remaining organic matters in the wastewater are removed through nano-filtration, such that nano-filtration produced water and nano-filtration concentrated water are obtained; the nano-filtration produced water is subjected to a deep concentration treatment with the high-efficiency reverse osmosis technology, such that high-efficiency reverse osmosis produced water and high-efficiency reverse osmosis concentrated water are obtained; the high-efficiency reverse osmosis concentrated water is subjected to a membrane distillation deep concentration treatment, such that membrane distillation produced water and membrane distillation concentrated water are obtained; and the membrane distillation concentrated water is subjected to the evaporation crystallization treatment, such that salt solids in the concentrated water are crystallized. Through the above process flow, water resource is recovered to a maximal extent while a wastewater discharge problem is solved , and high-salinity high-organic-matter wastewater zero discharge is substantially realized.

Description

Technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a zero-discharge method for high-salt and high-organic wastewater. In particular, it refers to a zero-discharge method that uses membrane separation technology to treat high-salt and high-organic wastewater. More specifically, it relates to a "submerged membrane bioreactor + nanofiltration + high efficiency reverse osmosis + membrane distillation + evaporative crystallization" Zero discharge method of salt-rich organic waste water. Background technique [0002] In recent years, the high-salt and high-organic wastewater produced by petrochemical enterprises has become a treatment problem, which has caused great troubles to all enterprises. Therefore, it is urgent to find a new type of separation technology to solve the treatment and discharge problem of this type of wastewater. [0003] Nanofiltration (NF) is a membrane separation technology between ultrafiltration and re...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
CPCY02W10/33
Inventor 张新妙谢梓峰杨永强
Owner CHINA PETROLEUM & CHEM CORP
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