Treatment method of high-alcohol wastewater

A treatment method and technology for waste water, applied in water/sewage treatment, heating water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of difficult to achieve effluent, strict discharge index requirements, high treatment costs, and reduce treatment costs. The effect of high cost and operational stability

Inactive Publication Date: 2018-12-14
SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the alcohol-containing wastewater in the chemical industry often contains other organic substances, it is difficult to meet the increasingly stringent discharge index requirements after pretreatment + biological treatment, so further advanced treatment is often required after biochemical treatment
However, high-concentration chemical alcohol-containing wastewater often results in the failure of subsequent processes due to the unstable operation of pretreatment, and the complex organic composition leads to high back-end advanced treatment costs.

Method used

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  • Treatment method of high-alcohol wastewater

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Effect test

Embodiment 1

[0044] A certain pigment production wastewater contains methanol and other organic substances: COD is 26000mg / L, ammonia nitrogen is 110mg / L, and methanol content is 5000mg / L.

[0045] The treatment method provided by the invention is used for treatment: the wastewater to be treated first passes through the rectification system 1, and at the same time, the temperature of the wastewater is raised to 75° C. by introducing steam, and most of the alcohols in the wastewater are removed by utilizing the low boiling point of alcohols. Enter the ozone catalytic oxidation system 2 to oxidize the alcohols, the ozone dosage is 500mg / L, the oxidation time is 120 minutes, the ozone catalytic effluent enters the biochemical system 3, the anoxic tank sludge concentration is 6000mg / L, the aerobic tank The sludge concentration is 5000mg / L; the dissolved oxygen in the anoxic tank is 0.2mg / L, and the dissolved oxygen in the aerobic tank is 6.0mg / L; the hydraulic retention time in the anoxic tank ...

Embodiment 2

[0048] An alcoholic fermentation wastewater contains ethanol and other organic substances: COD is 11000mg / L, ammonia nitrogen is 50mg / L, and ethanol content is 2100mg / L.

[0049] The treatment method provided by the invention is used for treatment: the wastewater to be treated first passes through the rectification system 1, and at the same time, the temperature of the wastewater is raised to 65° C. by introducing steam, and most of the alcohols in the wastewater are removed by utilizing the low boiling point of alcohols. Enter the ozone catalytic oxidation system 2 to oxidize the alcohols, the ozone dosage is 200mg / L, the oxidation time is 30 minutes, the ozone catalytic effluent enters the biochemical system 3, the anoxic tank sludge concentration is 4000mg / L, the aerobic tank The sludge concentration is 3000mg / L; the dissolved oxygen in the anoxic tank is 0.5mg / L, and the dissolved oxygen in the aerobic tank is 2.0mg / L; the hydraulic retention time of the anoxic tank is 20 h...

Embodiment 3

[0052] A pharmaceutical wastewater contains methanol and other organics: COD is 16500mg / L, ammonia nitrogen is 880mg / L, and methanol content is 3200mg / L.

[0053] The treatment method provided by the invention is used for treatment: the wastewater to be treated first passes through the rectification system 1, and at the same time, the temperature of the wastewater is raised to 70° C. by introducing steam, and most of the alcohols in the wastewater are removed by utilizing the low boiling point of alcohols. Enter the ozone catalytic oxidation system 2 to oxidize the alcohols, the ozone dosage is 280mg / L, the oxidation time is 600 minutes, the ozone catalytic effluent enters the biochemical system 3, the anoxic tank sludge concentration is 5000mg / L, the aerobic tank The sludge concentration is 5000mg / L; the dissolved oxygen in the anoxic tank is 0.3mg / L, and the dissolved oxygen in the aerobic tank is 4.0mg / L; the hydraulic retention time of the anoxic tank is 30 hours, and the hyd...

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Abstract

The invention relates to a treatment method of high-alcohol wastewater. The treatment method comprises the following steps: heating and rectifying the high-alcohol wastewater, controlling a rectifyingtemperature at 65-75 DEG C; oxidizing the rectified effluent, wherein the concentration of alcohol in the treated oxidized effluent is less than or equal to 200 mg / L; biodegrading organic matters andammonia-nitrogen in the oxidized effluent; and performing resin adsorption treatment on biodegraded wastewater, wherein the treated effluent is wastewater after treatment to reach a standard. The treatment effect of the high-alcohol wastewater treated by the treatment method of the invention can reach requirements on limit values of discharge concentrations of COD, ammonia nitrogen and total nitrogen indexes in Integrated Wastewater Discharge Standard GB8978-1996; a process idea of pretreatment + biochemical treatment + deep treatment disclosed by the invention not only ensures treatment depth, but also considers resource utilization, and minimizes treatment costs; the treatment method provided by the invention can perform gradient treatment on alcohol substances and other pollutants in the water; and the process has high running stability.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating high alcohol wastewater realized by a combined process of distillation + ozone catalysis + biochemistry + resin adsorption. Background technique [0002] Alcohol-containing wastewater can be divided into two categories according to its emission source: one is the wastewater discharged from the fermentation industry, and the other is the drainage of some organic solvents in the pharmaceutical and chemical industries. [0003] For some low-concentration alcohol-containing wastewater, anaerobic + aerobic biological method is mainly used for treatment, while for high-alcohol wastewater, due to the toxic inhibition effect of high-concentration alcohols (alcohol concentration ≥ 2000mg / L) on microorganisms, it is generally impossible to directly It is treated by biological method, and it needs to be pretreated before biochemical treatment. Since alcoh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/34C02F101/16
CPCC02F1/04C02F1/28C02F1/725C02F1/78C02F3/30C02F9/00C02F2101/16C02F2101/34
Inventor 代春龙邹宗海魏明勇
Owner SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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