Method for pretreatment of sulphate-contained high concentration organic wastewater by micro-aerobic hydrolysis and acidification

A technology of hydrolysis acidification and organic wastewater, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problems of molybdate expensive and economically unfeasible, and achieve Improve the effect of hydrolysis and acidification treatment, inhibit the occurrence of sulfate reduction reaction, and eliminate the effect of odorous substances

Inactive Publication Date: 2006-07-19
NANJING UNIV
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Problems solved by technology

However, studies have found that it has a non-selective inhibitory effect on microorganisms in the digestive system, and it also has an inhibitory effect on MPB. After a long period of use, SRB is easily domesticated by molybdate. At the same time, molybdate is expensive and economically unfeasible.

Method used

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  • Method for pretreatment of sulphate-contained high concentration organic wastewater by micro-aerobic hydrolysis and acidification
  • Method for pretreatment of sulphate-contained high concentration organic wastewater by micro-aerobic hydrolysis and acidification
  • Method for pretreatment of sulphate-contained high concentration organic wastewater by micro-aerobic hydrolysis and acidification

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example 1

[0024] Example 1: The antibiotic wastewater was treated by using the microaerobic hydrolysis acidification method of the present invention to pretreat organic wastewater with high concentration of sulfate. The water quality of antibiotic wastewater is shown in Table 1, and the schematic diagram of the treatment process and equipment is shown in figure 1 .

[0025]

project

COD

(mg / L)

SCOD / COD

BOD 5 / COD

SS

(mg / L)

pH

Antibiotic Wastewater

6500-22000

0.85-0.90

0.33-0.40

2500-13200

4.0-5.0

project

SO 4 2-

(mg / L)

COD / SO 4 2-

total salt content

(mg / L)

Organic solvent COD

(%)

Antibiotic Wastewater

790-5250

3-10

1920-11580

10-28

[0026] The -50-50mv environmental ORP achieved by micro-aerobic aeration is the most suitable environmental ORP condition for t...

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Abstract

The pretreatment method for high-concentration organic sewage contained sulfate by micro-oxygen hydrolyzing and acidifying comprises: on micro-oxygen condition, controlling the hydrolysis and acidification by aeration during anaerobic treatment process. Compared with prior art, this invention improves system treatment efficiency and yield of methane, and eliminates the effect to biological treatment from sulfide.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and more specifically relates to a pretreatment method and application of sulfate-containing high-concentration organic wastewater. Background technique [0002] The sulfate reduction reaction in the anaerobic biological treatment process seriously affects the effective treatment of this type of wastewater, so controlling the sulfide produced in the anaerobic process is a key factor for the biological treatment of sulfate-containing wastewater. At present, a variety of methods to reduce the impact of sulfate reduction reaction on wastewater biological treatment are in the experimental stage, which can be divided into two categories, one is to reduce the toxic effect of sulfate reduction products (sulfides) on microorganisms, and the other is to inhibit The sulfate reduction reaction takes place. The main ways are: [0003] (1) The single-phase anaerobic ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/30C02F101/10
Inventor 任洪强严永红
Owner NANJING UNIV
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