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Advanced oxidation-biological treatment device for non-biodegradable waste water

A refractory biodegradation and advanced oxidation technology is applied in the field of new devices for the treatment of refractory biodegradable wastewater, which can solve the problems of reduced methane production efficiency, deterioration of anaerobic process, low utilization rate, etc. The effect of reducing weight and reducing energy consumption

Active Publication Date: 2014-04-30
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conventional homogeneous Fenton system also has deficiencies, mainly as, H 2 o 2 The low utilization rate and the production of a large amount of iron-containing sludge make the treatment cost high and cause secondary pollution
When Fenton's subsequent anaerobic process treats organic wastewater, if the wastewater contains a certain concentration of sulfate, sulfate reducing bacteria (SRB) will inevitably multiply and carry out sulfate reduction reaction, which will bring disadvantages to normal anaerobic digestion. Influence, sulfate-reducing bacteria (SRB) and methanogenic bacteria (MPB) compete with organic substrates to reduce the efficiency of anaerobic digestion of wastewater to produce methane, inhibit MPB and lead to deterioration of the anaerobic process, and sometimes even lead to anaerobic React system crash

Method used

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  • Advanced oxidation-biological treatment device for non-biodegradable waste water

Examples

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Effect test

Embodiment 1

[0047] The advanced oxidation-biological treatment device for refractory biodegradable wastewater is used to treat wastewater from a printing and dyeing factory with a COD concentration of 850mg / L. The device includes the following process steps:

[0048] (1) The waste water to be treated is pumped into the baffle plate Fenton reactor 6 from the sump well. First waste water enters the acid adding pond 7. Turn on the acid adding device 1, add nitric acid / sulfuric acid (1:1) mixed acid to the front end of the acid adding pool, adjust the pH to about 3.0, and use the ferrous adding device 2 to add ferrous nitrate 50mg / L to the ferrous adding pool 8 , at the inlet end of Fenton main reaction tank 9, through H 2 o 2 Dosing device 3 adds 350mg / L H 2 o 2 , and reacted in Fenton main reaction tank 9 for 30 minutes. After the reaction is complete, enter the alkali-adding pool 10, add NaOH to adjust the pH to 9.0 with the alkali-adding device 4, and then add 2 mg / L anion PAM to the...

Embodiment 2

[0053] The advanced oxidation-biological treatment device for refractory biodegradable wastewater is used to treat a certain chemical wastewater with a COD concentration of 1980 mg / L. The device includes the following process steps:

[0054] (1) The sewage to be treated is pumped into the baffle plate Fenton reactor 6 from the sump well. First waste water enters the acid adding pond 7. Turn on the acid adding device 1, add nitric acid / sulfuric acid (1:1) mixed acid to the front end of the acid adding pool, adjust the pH to about 3.5, and use the ferrous adding device 2 to add ferrous nitrate 160 mg / L to the ferrous adding pool 8 , at the inlet end of Fenton main reaction tank 9, through H 2 o 2 Dosing device 3 adds 1000mg / L H 2 o 2 , and reacted in Fenton main reaction tank 9 for 50 minutes. After the reaction is complete, enter the alkali-adding pool 10, add NaOH to adjust the pH to 9.5 with the alkali-adding device 4, and then add 3 mg / L anion PAM to the front end of th...

Embodiment 3

[0059] The advanced oxidation-biological treatment device for refractory biodegradable wastewater is used to treat wastewater from a pharmaceutical factory with a COD concentration of 4572 mg / L. The device includes the following process steps:

[0060] (1) The sewage to be treated is pumped into the baffle plate Fenton reactor 6 from the sump well. First waste water enters the acid adding pond 7. Turn on the acid adding device 1, add nitric acid / sulfuric acid (1:1) mixed acid to the front end of the acid adding pool, adjust the pH to about 3.5, and use the ferrous adding device 2 to add ferrous nitrate 500mg / L to the ferrous adding pool 8 , at the inlet end of Fenton main reaction tank 9, through H 2 o 2 Dosing device 3 adds 3000mg / L H 2 o 2 , reacted in Fenton main reaction tank 9 for 80min. After the reaction is complete, enter the alkali-adding pool 10, and use the alkali-adding device 4 to add NaOH to adjust the pH to 8.5, and then add 4 mg / L anion PAM to the front en...

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Abstract

The invention relates to an advanced oxidation-biological treatment device for non-biodegradable waste water. The device comprises a baffle plate Fenton reactor (6), a precipitating pond (12), a baffle plate anaerobic pond (15) and a contact oxidization pond (18). Waste water to be treated flows through each reaction pond of the baffle plate Fenton reactor in sequence, reacts and enters the precipitating pond for precipitating, supernate in the precipitating pond enters each compartment of the baffle plate anaerobic pond in sequence for undergoing anaerobic digestion, water undergoing anaerobic treatment in the baffle plate anaerobic pond enters the contact oxidation pond for undergoing aerobic treatment, treated effluent enters an oblique-tube precipitating pond, and sludge undergoing secondary precipitation in the oblique-tube precipitating pond returns to the foremost end of the baffle plate anaerobic pond through a sludge reflux pump to realize reduction of the residual sludge, and treated water is stored in the reclaimed water pond. Compared with the prior art, the advanced oxidation-biological treatment device has the advantages of high agent use efficiency, low energy consumption, simple structure and remarkable increase of the sludge digesting efficiency and the gas yield.

Description

technical field [0001] The invention belongs to the field of environmental engineering and sewage treatment engineering, and in particular relates to a new device and process for treating refractory biodegradable wastewater by using Fenton oxidation as pretreatment and combining anaerobic and aerobic biological treatment methods. Background technique [0002] In recent years, with the rapid development of industry, the types and discharge of industrial wastewater are increasing, and the composition is more complex. Industrial wastewater such as pesticides, printing and dyeing, medicine and chemical industry contains many toxic and refractory organic pollutants, such as phenol, polychlorinated biphenyl, polycyclic aromatic hydrocarbons, etc. Wastewater not only has complex components, high concentration of organic matter, and poor biodegradability, it is becoming more and more difficult to treat, and it is particularly harmful to the environment. Some pollutants also have car...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 王进邱江平李旭东李银生
Owner SHANGHAI JIAO TONG UNIV
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