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A method based on variable pressure gradient to achieve rapid reduction of pollutants in domestic sewage in a short time

A domestic sewage and variable pressure technology, applied in the direction of biological water/sewage treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problems of slow effect, long time of domestic sewage, etc., achieve good effect and fast decontamination speed , the effect of not easy to leak

Active Publication Date: 2017-03-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing method takes a long time to treat domestic sewage and the effect is relatively slow, and provides a method for quickly reducing pollutants in domestic sewage based on variable pressure gradients in a short time

Method used

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  • A method based on variable pressure gradient to achieve rapid reduction of pollutants in domestic sewage in a short time
  • A method based on variable pressure gradient to achieve rapid reduction of pollutants in domestic sewage in a short time
  • A method based on variable pressure gradient to achieve rapid reduction of pollutants in domestic sewage in a short time

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Experimental program
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specific Embodiment approach 1

[0014] Specific implementation mode 1: This implementation mode is based on the method of quickly reducing pollutants in domestic sewage in a short time under variable pressure gradient, and proceeds according to the following steps:

[0015] Take the domesticated aerobic activated sludge, mix it with sewage evenly, pour it into the high-pressure reaction kettle, and the air compressor supplies oxygen to the high-pressure reaction kettle. By adjusting the opening degree of the high-pressure reaction kettle exhaust valve, the adjustment unit is 0.1MPa. Control the gas pressure in the reactor to make it run under seven gradient pressure conditions of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 and 0.7MPa in sequence. Each pressure state runs for 15 minutes, and one operation cycle is 105 minutes in total. After the operation cycle is over, the pressure is released, and the sludge is discharged from the water outlet, and it will continue to be used in the next operation cycle.

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the domesticated aerobic activated sludge is the sludge in the aerobic reaction tank in the denitrification and phosphorus removal process, and the sludge MLSS is 2.5-3g / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the aerobic activated sludge of described domestication is the sludge in the aerobic reaction tank in the denitrification and dephosphorization process, and the sludge MLSS is 2.8g / L. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for realizing quick reduction of contaminants in domestic sewage, in particular to a method for realizing quick reduction of contaminants in domestic sewage within a short time based on variable pressure gradient, in order to solve the problem that the existing biological method needs long time for treating the domestic sewage and slow in taking effect. The method includes: taking domesticated aerobic activated sludge to be mixed with the sewage, pouring the mixture into a high pressure reactor, supplying oxygen to the high pressure reactor via an air compressor, adjusting opening degree of a high pressure reactor exhaust valve by taking 0.1MPa as an adjustment unit so as to control aeration pressure in the reactor to be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 and 0.7MPa sequentially, operating the reactor under variable pressure on the seven-gradient pressure conditions, operating the reactor under each pressure state for 15minutes, relieving pressure after one operation cycle is finished, discharging the sludge from a water outlet, and continuing to use the reactor at a next operation cycle. The method can realize quick reduction of target contaminants in the domestic sewage within short time and is applied to the field of sewage treatment.

Description

technical field [0001] The invention relates to a method for realizing rapid reduction of pollutants in domestic sewage. Background technique [0002] Water resources are the basic conditions for the survival of human beings, and also the basic prerequisite for the sustainable development of my country's economy. my country's total water resources rank among the top in the world, but the per capita water resources are less than 1 / 4 of the world average. At the same time, due to the rapid development of our country's economy and the continuous growth of population, the pollution of surface water and groundwater has become increasingly serious, which has caused a serious shortage of water resources in our country. The problem of water resources has become the primary problem that our country has to solve in the 21st century. This poses a greater challenge to the water treatment industry, requiring us to develop advanced technologies suitable for the future water environment o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 赫俊国冯靖涵辛晓东赵聪
Owner HARBIN INST OF TECH
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