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High-concentrated emulsified oil waste water treating method

A wastewater treatment and emulsified oil technology, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve unreasonable pretreatment process, long hydraulic retention time of biochemical treatment, biochemical Dealing with issues such as large shock loads

Inactive Publication Date: 2004-07-07
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), Aerobic 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; The hydraulic retention time in the emulsion pool is 0.4 hours, the weight ratio of industrial sodium chloride and lime in...

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Abstract

A process for treating the sewage containing high content of emulsified oil includes such steps as removing the floating oil in an oil-isolating pool, removing suspended in oil regulating pool, demulsifying and air-floating separating to remove the waste oil and floc in top layer, electrolyzing in electrolyzer, air-floating separating for removing waste oil and floc, and biochemical treating. Its advantages are high efficiency, low cost and short period.

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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IPC IPC(8): C02F9/02C02F9/14
Inventor 詹伯君
Owner 詹伯君
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