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Efficient method for treating chemical wastewater

A high-efficiency technology for chemical wastewater, applied in the field of water treatment, can solve the problems of insufficient nutrients, poor biochemical properties, and imbalanced ratios, and achieve the effects of improving biochemical anaerobic processes, improving degradation efficiency, and improving B/C ratio.

Inactive Publication Date: 2019-04-12
JIANGSU FANGYANG WATER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wastewater is mainly hydrocarbons, with insufficient N and P nutrients, poor biochemical properties, some Co, Mn metal ions and some refractory substances, which have strong poisonous and inhibitory effects on microorganisms, and the influent lacks nitrogen, phosphorus and other Nutritional elements, C, N, P ratio imbalance, N, P nutrients deficiency
The design influent TDS of the sewage treatment plant is ≤4000 mg / L, and the salt content is high, which also brings adverse effects on the efficient operation of the biochemical system

Method used

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  • Efficient method for treating chemical wastewater
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  • Efficient method for treating chemical wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: as figure 2 As shown, fresh activated sludge is added to the 25,000 t / d sewage treatment plant, which can be transported through pipelines through the adjacent upstream wastewater treatment station, and its water content is 98.5%.

[0040] S1: Cultivate and domesticate a sufficient number of bacterial populations or sludge;

[0041] S2: Inoculate activated sludge into the anoxic tank, continuously add 550t / d of fresh activated sludge to a total of 3200t, and add nutrients as needed, target concentration of AO system sludge inoculation: 2000mg / L;

[0042] S3: Start the mixer of the anoxic tank system, and intermittently turn on the internal return pump to make the sludge mixture in the anoxic tank and the aerobic tank circulate properly;

[0043] S4: Intermittently turn on the blower of the aerobic pool system to control DO. Among them, the DO in the anoxic pool is ≤0.48 mg / L, and the DO in the aerobic pool is 2.2 mg / L. Filler is added in batches in the me...

Embodiment 2

[0047] Embodiment 2: as figure 2 As shown, fresh activated sludge is added to the 25,000 t / d sewage treatment plant, which can be transported through pipelines through the adjacent upstream wastewater treatment station, and its water content is 98.5%.

[0048] S1: Cultivate and domesticate a sufficient number of bacterial populations or sludge;

[0049] S2: Inoculate activated sludge into the anoxic tank, continuously add 450t / d of fresh activated sludge to a total of 2800t, and add nutrients as needed, target concentration of AO system sludge inoculation: 1000mg / L;

[0050] S3: Start the mixer of the anoxic tank system, and intermittently turn on the internal return pump to make the sludge mixture in the anoxic tank and the aerobic tank circulate properly;

[0051] S4: Intermittently turn on the blower of the aerobic pool system to control DO. Among them, the DO in the anoxic pool is ≤0.48 mg / L, and the DO in the aerobic pool is 1.8 mg / L. Filler is added in batches in the ...

Embodiment 3

[0056] Embodiment 3: as image 3 As shown, for the 25,000 t / d sewage treatment plant, add sub-fresh activated sludge, which is transported from other places by vehicles, and the moisture content of the sub-fresh activated sludge is 85%.

[0057] S1: Cultivate and domesticate a sufficient number of bacterial populations or sludge;

[0058] S2: Inoculate activated sludge into the anoxic tank, continuously add 45 t / d sub-fresh activated sludge for a total of 280t, supplemented by adding nutrients according to the situation, AO system sludge inoculation target concentration: 1000 mg / L ;

[0059] S3: Start the mixer of the anoxic tank system, and intermittently turn on the internal return pump to make the sludge mixture in the anoxic tank and the aerobic tank circulate properly;

[0060] S4: Intermittently turn on the blower of the aerobic pool system to control DO. Among them, the DO in the anoxic pool is ≤0.48 mg / L, and the DO in the aerobic pool is 1.8 mg / L. Filler is added i...

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Abstract

The invention discloses an efficient method for treating chemical wastewater. The method comprises the processes such as an adjustment tank, a hydrolysis acidification pool, an oxygen deprivation pool, an aerobic pool and a secondary sedimentation pool of a sewage treatment factory and is characterized in that inoculated sludge is added in the processes; microorganisms are main bodies for sludge purification, culture, selection and domestication of active sludge of the adjustment tank, the hydrolysis acidification pool and an AO pool are used as innovation points of the method, existing conditions of engineering are sufficiently used, in necessity, engineering technology measures such as temporary active sludge backflow are adopted, the general technical problems of slow starting and low efficiency of a biochemistry system in the industry are solved, the biochemistry anaerobic technology is improved, and the B / C ratio is increased, so that the degradation efficiency of the biochemistrysystem is improved. According to the efficient method, chemical wastewater can be effectively treated, and the sludge amount reaches the design demand as much as possible in shortest time.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for efficiently treating chemical wastewater. Background technique [0002] The types and components of chemical wastewater are complex. The sewage contains a large amount of p-toluic acid, terephthalic acid, other benzenes, phenols, cyanides and other refractory pollutants. The biodegradability is poor. After pretreatment at the treatment station, most of the biodegradable and some refractory pollutants have been removed, and the content of biodegradable organic pollutants in the discharged sewage is extremely low. When the B / C ratio is less than 0.25, the biodegradation is difficult. [0003] The water quality components of sewage treatment plants are complex, and the main components are terephthalic acid (TA), purified terephthalic acid (PTA), crude terephthalic acid (CTA), benzoic acid (BA), p-xylene, isophthalic acid , p-toluic acid, 4-formalde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
CPCC02F3/30C02F2001/007C02F2305/06
Inventor 夏季春
Owner JIANGSU FANGYANG WATER
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