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Process for treating waste water for car wash and equipment

A technology of car washing wastewater and treatment method, which is applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as soil pollution, separation of heavy metal pollutants, etc. Avoid re-contamination and reduce excessive waste

Inactive Publication Date: 2008-11-19
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a car wash wastewater treatment method and equipment to solve the problem that the prior art cannot effectively separate heavy metal pollutants from car wash wastewater, recycle filtered clear water, and avoid heavy metal pollution The problem of soil re-contamination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Car wash wastewater is treated in the following ways:

[0043] (1) Add the calcium hydroxide of 100g in waste water, and carry out aeration treatment to waste water, make waste water and calcium hydroxide fully mix;

[0044] (2) Calcium hydroxide converts cadmium ions and lead ions in the waste water into lead hydroxide and chromium hydroxide which are insoluble in water, which are separated and precipitated;

[0045] (3) Filter the suspended and small flocs or particles in the water through the filter;

[0046] (4) Collect, compress, and dehydrate the sludge deposited in the waste water tank to form a mud cake;

[0047] (5) Burn or landfill the mud cake;

[0048] (6) Wastewater generated from sludge dehydration and other operations can be treated by repeating the steps in (1)-(4).

Embodiment 2

[0050] Car wash wastewater is treated in the following ways:

[0051] (1) add the calcium hydroxide of 120g in waste water, and carry out aeration treatment to waste water, make waste water and calcium hydroxide fully mix;

[0052] (2) Calcium hydroxide converts cadmium ions and lead ions in the waste water into lead hydroxide and chromium hydroxide which are insoluble in water, which are separated and precipitated;

[0053] (3) Filter the suspended and small flocs or particles in the water through the filter;

[0054] (4) Collect, compress, and dehydrate the sludge deposited in the waste water tank to form a mud cake;

[0055] (5) Burn or landfill the mud cake;

[0056] (6) Wastewater generated from sludge dehydration and other operations can be treated by repeating the steps in (1)-(4).

Embodiment 3

[0058] (1) add the calcium hydroxide of 110g in waste water, and carry out aeration treatment to waste water, make waste water and calcium hydroxide fully mix;

[0059] (2) Calcium hydroxide converts cadmium ions and lead ions in the waste water into lead hydroxide and chromium hydroxide which are insoluble in water, which are separated and precipitated;

[0060] (3) Filter the suspended and small flocs or particles in the water through the filter;

[0061](4) Collect, compress, and dehydrate the sludge deposited in the waste water tank to form a mud cake;

[0062] (5) Burn or landfill the mud cake;

[0063] (6) Wastewater generated from sludge dehydration and other operations can be treated by repeating the steps in (1)-(4).

[0064] The equipment used in this method consists of five parts: a cleaning device, a muddy water treatment device, a clear water collection tank, an additional device and a high-pressure water spray device. The cleaning device is arranged on the upp...

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PUM

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Abstract

The invention relates to a method for processing automobile-washing wastewater, comprising the following steps that: firstly, 100 to 120 grams of calvital is added into the wastewater for aeration treatment and mixed with the wastewater; secondly, cadmium irons and lead irons in the wastewater are converted into lead hydroxide and chromic hydroxide which are then separated and deposited; thirdly, floccule or particulate matter in the water is filtered by a filter screen; fourthly, deposited sludge in a wastewater disposal basin is collected, compressed and dehydrated to form mud cakes; fifthly, the mud cakes are burned or buried; sixthly, wastewater generated in the operations of sludge dehydration and so on can be processed by repeating the steps from the first step to the fourth step. Devices adopted for application of the method include a cleaning device, a slurry processing device, a clear water collection tank, an additional device and a high-pressure water injector. The method not only can separate heavy metal elements from the wastewater and recycles clear water after filtration but also avoids secondary pollution of heavy metal pollutant on the soil.

Description

technical field [0001] The invention relates to a method and equipment for treating car wash wastewater, in particular to a method and equipment for treating wastewater used in car wash yards. Background technique [0002] At present, car washes of various sizes are located in various large, medium and small cities across the country, and the car wash industry consumes a lot of water, and the water used for cleaning cars is basically discharged at one time during use. Since the sewage or waste water after washing the body and wheels contains a large amount of heavy metal pollutants, if these sewage containing heavy metal pollutants are discharged into farmland or other soils, it will inevitably cause serious pollution to these soils and people. In order to save water and protect the environment, the treatment of car wash wastewater is also imperative. [0003] The publication number is CN 1569673A, and the name of the invention is a car wash wastewater treatment method and ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F11/12C02F1/62C02F1/52
Inventor 翟立前贵大伟王硕
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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