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Method for treating wastewater from comprehensive disposal center for hazardous waste

A technology of hazardous waste and treatment method, applied in the environmental field, can solve the problems of difficult to stably meet the treatment standard, poor anti-shock load capacity, poor removal effect, etc., and achieves that equipment and structures occupy less land, high reliability, and stability. High standard effect

Inactive Publication Date: 2019-10-29
江苏省环境工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this law is not effective for heavy metals, especially Cr 6+ And COD and other indicators have poor removal effects, poor impact load resistance, and the system is prone to collapse
[0005] Although the above three inventions have a certain treatment effect on hazardous waste leachate, it is difficult to stably meet the corresponding treatment standards, and the cost performance is not high.

Method used

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  • Method for treating wastewater from comprehensive disposal center for hazardous waste

Examples

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Effect test

Embodiment 1

[0035] A method for treating waste water in a hazardous waste comprehensive disposal center, comprising the following steps:

[0036] 1) Classified collection and quality-based treatment: Separately collect waste water from physical and chemical treatment workshops, transport vehicles, site washing and laboratories for pretreatment with oil separation and air flotation; collect waste water from landfills, waste gas treatment units and hazardous waste incineration workshops The wastewater is collected separately and pretreated by coagulation and sedimentation; the coagulant is basic aluminum chloride (PAC), the coagulant aid is polyacrylamide (PAM), and the dosage is PAC: 40~50mg / L, respectively. PAM: 5~10mg / L;

[0037] 2) Mix the effluent from step 1) and adjust the pH value to 6~8, then add the oxidant and stir evenly; the oxidant is hydrogen peroxide (H 2 o 2 ), the dosage is: 0.8~1mL / L;

[0038] 3) Adjust the pH of the effluent from step 2) to 2~3, then add the reducing ...

Embodiment 2

[0050] A method for treating waste water in a hazardous waste comprehensive disposal center, comprising the following steps:

[0051] 1) Classified collection and quality-based treatment: Separately collect waste water from physical and chemical treatment workshops, transport vehicles, site washing and laboratories for pretreatment with oil separation and air flotation; collect waste water from landfills, waste gas treatment units and hazardous waste incineration workshops The wastewater is collected separately and pretreated by coagulation and sedimentation; the coagulant is basic aluminum chloride (PAC), the coagulant aid is polyacrylamide (PAM), and the dosage is PAC: 30~40mg / L, PAM: 1~5mg / L;

[0052] 2) Mix the effluent from step 1) and adjust the pH value to 6~8, then add the oxidant and stir evenly; the oxidant is hydrogen peroxide (H 2 o 2 ), the dosage is: 0.5~0.8mL / L;

[0053] 3) Adjust the pH of the effluent from step 2) to 2~3, then add the reducing agent and sti...

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Abstract

The invention discloses a method for treating wastewater from a comprehensive disposal center for hazardous waste. The method comprises the following steps: 1) classified collection and treatment according to different qualities; 2) oxidative decomplexation; 3) reduction of heavy metals; 4) two-stage precipitation; 5) hydrolysis acidification and A / O contact oxidation; and 6) Fenton oxidation andcoagulation sedimentation, thereby allowing effluent to reach the standard. The method of the invention realizes the maximal harmless treatment of the wastewater from the comprehensive disposal centerfor hazardous waste, has the advantages of strong adaptability, high reliability, small land occupation, economical rationality, etc., and is a good way for realizing efficient and low-carbon treatment and stable standard-reaching discharge of wastewater in the comprehensive disposal center for hazardous waste.

Description

technical field [0001] The invention belongs to the field of environmental technology, and in particular relates to waste water treatment technology, in particular to a treatment method for waste water in a comprehensive hazardous waste disposal center. Background technique [0002] Hazardous waste comprehensive disposal center refers to the unit that conducts comprehensive treatment and disposal of various hazardous wastes. The specific engineering content generally includes hazardous waste incineration system, hazardous waste physical and chemical treatment system, waste mineral oil recovery system, sludge drying system, bucket washing system and supporting auxiliary production facilities, etc., and sometimes a landfill system is also set up depending on the situation Wait. The specific hazardous wastes involved include rectification residues, waste emulsions, waste mineral oils, waste acids, waste alkalis, heavy metal-containing waste liquids, organic waste liquids, dyes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/20C02F101/30
CPCC02F1/24C02F1/5236C02F1/56C02F1/66C02F1/70C02F1/722C02F3/30C02F9/00C02F2001/007C02F2101/20C02F2101/30C02F2305/026
Inventor 张龙白永刚朱化军林乔乔涂勇
Owner 江苏省环境工程技术有限公司
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