High-concentrated emulsified oil waste water treating method

A technology for wastewater treatment and emulsified oil, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Dealing with problems such as large shock loads

Inactive Publication Date: 2005-06-15
詹伯君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method relatively reduces the treatment cost, its pretreatment process is unreasonable, and the impact load of biochemical treatment is large. If better results are to be obtained, the hydraulic retention time of the biochemical treatment is long, the investment and operation costs are still large, and it is easy to cause biochemical treatment. Handle system crashes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The present invention it comprises the following steps successively:

[0019] 1) Remove the upper oil slick in the grease trap.

[0020] The high-concentration emulsified oil wastewater enters the underground grease trap through the grid well. There is an oil collection well in the grease trap, and the floating oil collected from the grease trap is pumped to the waste oil tank through the oil pump. The hydraulic retention time in the grease trap can be controlled at about 4 hours.

[0021] 2) The wastewater after removing the floating oil in the upper layer is sent into the regulating tank, and then the suspended oil is removed.

[0022] The effluent from the grease trap enters the regulating tank, where the waste water is homogenized and evenly distributed. The lift pump lifts the waste water to the suspended oil removal facility to remove the suspended oil. The suspended oil removal facility uses inclined pipes and filters in turn. The inclined tube is a porous tube...

Embodiment 2

[0031] The difference between this example and Example 1 is that between the steps "demulsification and air flotation" and "electrolysis", there are steps of aerobic biochemical treatment of wastewater and separation of activated sludge in sedimentation tanks. Backflow to the aerobic biochemical treatment tank, the hydraulic retention time of the aerobic biochemical treatment is 1.5 hours; step "5)" comprises the following steps successively: 1), facultative biochemical treatment of waste water, the hydraulic retention time is 5 hours, 2), well Oxygen biochemical treatment of wastewater, the hydraulic retention time is 6 hours, 3), the sedimentation tank separates the activated sludge, and the activated sludge returns to the facultative biochemical treatment tank; the hydraulic retention time in the suspended oil removal facility can be controlled at 1.2 hours; demulsification The hydraulic retention time in the pool is 0.4 hours, the weight ratio of industrial sodium chloride ...

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PUM

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Abstract

The invention provides a method for treating high-concentration emulsified oil wastewater. It sequentially includes separating the upper layer of oil slick in the oil separation tank, entering the wastewater after removing the upper layer of oil slick into the adjustment tank, and then removing the suspended oil, breaking the emulsion of the wastewater treated in the previous step and air flotation to separate the upper layer of waste oil and For floc, the wastewater treated in the previous step is electrolyzed in the electrolytic cell, and then the upper layer of waste oil and floc is separated by air flotation, and the wastewater treated in the previous step is biochemically treated. Compared with the prior processing method, the present invention reduces processing cost, improves processing effect and shortens processing time.

Description

technical field [0001] The invention relates to a method for treating high-concentration emulsified oil wastewater. Background technique [0002] For wastewater treatment, effectiveness, efficiency and cost indicators must be taken into account at the same time. High-concentration emulsified oil wastewater contains not only high-concentration emulsified oil, but also a large amount of toxic organic pollutants, with COD as high as 5000-20000mg / L, which is extremely difficult to treat. In the past, high-concentration emulsified oil wastewater treatment methods often used chemical demulsification or electrolytic demulsification and air flotation to separate the upper layer of waste oil and flocs, and then adsorbed with activated carbon. This method is extremely expensive to process. In order to reduce the treatment cost, some people adopt the method of regeneration treatment after pretreatment. Although this method relatively reduces the treatment cost,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F9/14
Inventor 詹伯君
Owner 詹伯君
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