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Treatment method of acrylic acid wastewater

A treatment method and technology of acrylic acid, applied in multi-stage water treatment, water/sewage treatment, natural water treatment and other directions, can solve the problems of adverse environmental impact, high toxicity, failure to achieve wastewater discharge standards, and achieve wastewater biochemical improvement, The effect of reducing the amount of clean water and good environmental effect

Inactive Publication Date: 2019-02-19
JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main components of wastewater generated during the production of acrylic acid are acrylic acid and acrylates, which are highly toxic and complex in composition
The main treatment method currently used in China is still the incineration method. Other treatment methods such as anaerobic, aerobic, anaerobic and aerobic combined processes, the single anaerobic or aerobic process has a low COD removal rate, and the anaerobic and aerobic process Although the COD removal rate is high, ammonia nitrogen and total nitrogen have not been studied as important pollution indicators
Therefore, there may still be a problem that the ammonia nitrogen content may exceed the standard in the treatment of acrylic acid wastewater by the process of the prior art. The hidden danger is that the discharge of the wastewater has not been achieved, which will have an extremely adverse impact on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, pass the acrylic acid wastewater into the PAC reaction tank, control and adjust the pH to 8; add a 10% PAC solution with a mass fraction of 5.0kg per ton of wastewater, react for 0.5h, and then flow into the sedimentation tank in the subsequent process, and use 15.0 per ton of wastewater The mass fraction of kg added is 5‰ PAM solution for flocculation and sedimentation, the supernatant flows into the biochemical collection tank, and the sludge is transported to the sludge concentration tank. Pass the coagulation effluent water into the primary aerobic reaction tank, adjust the pH to 7, control the water temperature at 30°C, and add high-salt and toxicity-resistant bacteria to the water body, the amount of bacteria added is 3%-7% of high-salt and toxicity-resistant bacteria First-level aerobic dosing with aerobic filler, the filling ratio is 10%, and the first-level aerobic reaction is carried out for 30 hours, and the dissolved oxygen in the aerobic tank is contr...

Embodiment 2

[0031] First, pass the acrylic acid wastewater into the PAC reaction tank, control and adjust the pH to 7; add the PAC / PAM solution, react for 1.0h, the effluent will flow into the sedimentation tank in the subsequent process, the supernatant will flow into the biochemical collection tank, and the sludge will be transported to the sewage Mud thickening pool. Pass the coagulation effluent water into the first-level aerobic reaction tank, adjust the pH to 7, control the water temperature to 33°C, and add salt-tolerant composite bacteria to the water body, add aerobic filler to the first-level aerobic, and the filling ratio is 10%. Carry out the primary aerobic reaction for 24 hours, and control the dissolved oxygen in the aerobic tank to 4 mg / L; the effluent is passed into the ABR anaerobic reaction tank, the pH is controlled to 9, the water temperature is controlled to 33°C, and salt-tolerant complex bacteria are added to the water body. ABR is anaerobically fed with anaerobic ...

Embodiment 3

[0033]First, pass the acrylic acid wastewater into the PAC flocculation reaction tank, adjust the pH to 8~9; add 5.0 kg of 10% PAC solution per ton of wastewater, and react for 0.5 h; In the process sedimentation tank, 15.0kg per ton of wastewater is added with a mass fraction of 5‰PAM solution for flocculation and sedimentation; the supernatant flows into the biochemical collection tank, and the sludge is transported to the sludge concentration tank; first, the water body of the biochemical collection tank is passed into the first stage Continuous aerobic reaction tank, control the dissolved oxygen in the first-level aerobic tank to 2mg / L, and add 3%-7% salt-tolerant complex bacteria to the water body; add aerobic filler to the first-level continuous aerobic tank, and the filler volume accounts for the total 10% of the tank capacity, aerobic biochemical reaction for 24 hours; the water body after the first-level continuous aerobic reaction is passed into the anaerobic reaction...

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Abstract

The invention discloses a treatment method of acrylic acid wastewater, and belongs to the field of wastewater treatment method, according to the method, the acrylic acid wastewater is introduced to acoagulation reaction tank, so that most of the suspended impurities in the wastewater can be removed, and the sludge and water in the effluent after the coagulation reaction are separated by flowing through a sedimentation tank. The supernatant is introduced into a biochemical system, and the organic pollutants are degraded through one-stage continuous aerobic / ABR anaerobic / two-stage continuous aerobic / BAF aerobic, and the whole organic nitrogen of the wastewater is subjected to ammoniated, nitrated and denitrified reactions. The sediment sludge is subjected to external transportation treatment, the supernatant is discharged after reaching the standard. The biochemical combination process simultaneously ammoniates, nitrates and denitrifies the whole organic nitrogen of the wastewater, andtreats ammonia and nitrogen and whole nitrogen as important pollution indexes for treatment, and the operation cost is low. After the effluent is treated through biochemical treatment, the COD, ammonia nitrogen and whoel nitrogen are completely discharged according to the standard. Good environmental effect is provided.

Description

technical field [0001] The invention belongs to the field of sewage treatment methods, in particular to a method for treating acrylic acid wastewater. Background technique [0002] Acrylic acid (Acrylic acid), also known as 2-acrylic acid, is the simplest unsaturated carboxylic acid, which consists of a vinyl group and a carboxyl group. It is a very important raw material for organic synthesis. Its polymers are widely used in building materials, coatings, synthetic fiber and many other fields. [0003] The main components of wastewater generated during the production of acrylic acid are acrylic acid and acrylic acid esters, which are highly toxic and complex in composition. The main treatment method currently used in China is still the incineration method. Other treatment methods such as anaerobic, aerobic, anaerobic and aerobic combined processes, the single anaerobic or aerobic process has a low COD removal rate, and the anaerobic and aerobic process Although the COD rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36C02F101/38
CPCC02F1/5236C02F1/56C02F3/302C02F3/34C02F9/00C02F2001/007C02F2101/38C02F2103/36C02F2301/08
Inventor 周顺蒋伟群高峰徐林兰高映海
Owner JIANGSU LASON CHEM ENVIRONMENTAL PROTECTION
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