BCB combination process of treating organic waste water

A combined process, organic wastewater technology, applied in aerobic process treatment, sustainable biological treatment, water/sewage multi-stage treatment, etc., can solve the problems of high treatment cost and unbearable business economy.

Inactive Publication Date: 2005-09-28
SHANGHAI WEIYE ENVIRONMENTAL PROTECTION ENG
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, the direct use of catalytic oxidation to pretreat high-concentration refractory organic wastewater will inevitably lead to waste of oxidants, resulting in high treatment costs for high-concentration refractory organic wastewater, which cannot be afforded economically by enterprises.

Method used

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  • BCB combination process of treating organic waste water
  • BCB combination process of treating organic waste water

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Experimental program
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Embodiment Construction

[0011] A treatment experiment was carried out on the phenol wastewater discharged from the phenol production workshop of a large petrochemical enterprise. The COD Cr =6000~18000mg / L, salt (sodium sulfate) = about 5%, BOD 5 / COD Cr =0.2 or so, it belongs to high-concentration refractory organic wastewater. adopt respectively figure 1 The traditional craft shown and figure 2 The results of the new process treatment of the BCB combination shown are as follows.

[0012] Preface

No

raw water

COD

(mg / L)

30%H 2 o 2

Dosage

(mL / L)

oxidation reaction

out of water

COD a

(mg / L)

oxidation reaction

out of water

BOD 5 / CO

D.

oxidation reaction

Reactor out

water dilution

multiple b

A / O student

system

HRT(h)

A / O system

drain water

COD

(mg / L)

1

8450

20

4000

0.53

3

42

...

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Abstract

The present invention belongs to the field of pollution controlling technology, and is one new technological process of treating high concentration and hard-to-degrade organic waste water. The combined biological oxidation-catalytic oxidation-biological oxidation process (BCB process) is adopted in treating high concentration and hard-to-degrade organic waste water. The high concentration and hard-to-degrade organic waste water is first treated in the B1 section to eliminate most of its biodegradable organic matter via aerobic hydrolysis and biological oxidation, then catalytically oxidized in the C section to improve the biochemical property of water, and finally biologically oxidized in the B2 section. Compared with traditional treating process, the BCB process has greatly reduced oxidant consumption and obviously lowered running cost.

Description

technical field [0001] The invention belongs to the field of water pollution control, and relates to a new process for treating high-concentration refractory organic wastewater, which adopts a "biological oxidation-catalytic oxidation-biological oxidation combined process" (referred to as BCB combined process) to treat high-concentration refractory organic wastewater. Background technique [0002] For high-concentration refractory organic wastewater, coagulation sedimentation or chemical oxidation are generally used for pretreatment, and then biological treatment. However, for some high-concentration refractory organic wastewater with small molecular weight, the effect of coagulation and sedimentation is very poor, and chemical oxidation method is often required for pretreatment. To carry out chemical oxidation treatment of wastewater under normal temperature and pressure, cheap air or oxygen cannot be used as the oxidizing agent at present, and high-priced chemical oxidizi...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C02F1/72C02F3/02C02F9/14
CPCY02W10/10
Inventor丁伟曹国民张大年
OwnerSHANGHAI WEIYE ENVIRONMENTAL PROTECTION ENG