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Cleaning method for wastewater treatment system

A sewage treatment system, water flushing technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, liquid cleaning method, etc., can solve problems such as untimely and excessive flushing, and avoid clogging or compaction, saving energy and water resources

Inactive Publication Date: 2019-04-09
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a cleaning method for sewage treatment system to solve the problem of excessive flushing or untimely flushing of sewage treatment system in the prior art

Method used

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  • Cleaning method for wastewater treatment system
  • Cleaning method for wastewater treatment system
  • Cleaning method for wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A sewage treatment system including a primary sedimentation tank and a denitrification tank is used, and the primary sedimentation tank is located upstream of the denitrification tank. Use a liquid level monitoring device to monitor the water level in the primary sedimentation tank, where the elevation L 1 Set it at a distance of 5cm from the outlet of the primary sedimentation tank. After detecting the water level and elevation L in the primary sedimentation tank 1 At the same time, stop the sewage transportation to the primary sedimentation tank, and clean the tank wall, pool bottom, biofilm and the sewage inlet of the denitrification filter in the denitrification filter. The cleaning method is as follows: 0.3L / s / m 2 Flush with air for 7 minutes; at 0.2L / s / m 2 combined air and 2.5 times the water flow for 5 minutes; and 5 minutes for 2 times the water flow. After cleaning, the sewage delivery to the primary sedimentation tank is resumed.

Embodiment 2

[0047] A sewage treatment system including a primary sedimentation tank and a nitrification tank is used, and the primary sedimentation tank is located upstream of the nitrification tank. Use an electronic monitoring device to monitor the water level in the primary sedimentation tank, where the elevation L 1 Set it at a distance of 6cm from the outlet of the primary sedimentation tank. After detecting the water level and elevation L in the primary sedimentation tank 1 At the same time, stop the sewage transport to the primary sedimentation tank, and clean the tank wall, pool bottom, biofilm and sewage inlet of the nitrification filter in the nitrification filter. The cleaning method is as follows: 0.5L / s / m 2 Flush with air for 5 minutes; at 0.4L / s / m 2 combined air and 1.5 times the water flow for 3 minutes; and 3 minutes for 3 times the water flow. After cleaning, the sewage delivery to the primary sedimentation tank is resumed.

Embodiment 3

[0049] A sewage treatment system including a primary sedimentation tank and a denitrification tank is used, and the primary sedimentation tank is located upstream of the denitrification tank. Use an electronic monitoring device to monitor the water level in the primary sedimentation tank, where the elevation L 1 Set it at a distance of 7cm from the outlet of the primary sedimentation tank. After detecting the water level and elevation L in the primary sedimentation tank 1 At the same time, stop the sewage transportation to the primary sedimentation tank, and clean the pool wall, pool bottom, biofilm and the sewage inlet of the denitrification filter in the denitrification filter. The cleaning method is as follows: 0.4L / s / m 2 Air flushing for 6 minutes; at 0.3L / s / m 2 Combined flushing with air and 2 times the water flow for 4 minutes; and 4 minutes for 2.5 times the water flow. After cleaning, the sewage delivery to the primary sedimentation tank is resumed.

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Abstract

The invention provides a cleaning method for a wastewater treatment system. In the cleaning method of the wastewater treatment system, the wastewater treatment system comprises a first-stage treatmentdevice and a second-stage treatment device which are communicated with each other; the cleaning method comprises the steps: monitoring the water level in the first-stage treatment device; and cleaning the second-stage treatment device when the water level in the first-stage treatment device reaches an elevation L1. By applying the technical scheme of the invention, the problem that the wastewatertreatment system is excessively flushed or is not flushed in time in the prior art is solved. Filtering material blocking or hardening is avoided, meanwhile, the energy consumption is reduced, and water resources are saved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a cleaning method for a sewage treatment system. Background technique [0002] In recent years, the environmental problems of water pollution have become prominent year by year, restricting the sustainable development of China's economy and ecology. In order to control water pollution, sewage treatment equipment has been widely used in all walks of life in China. At present, many large enterprises have equipped domestic sewage treatment equipment for their living areas. Compared with the water load of urban sewage treatment plants, the domestic sewage treatment system of enterprises has the characteristics of uncertainty and imbalance in the time period, so a sewage treatment system with strong adaptability is required. The process of using biofilm to treat sewage has been widely used in recent years. [0003] However, in the process of using the biofilm method, the processing p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B08B3/02B08B5/02
CPCB08B3/02B08B5/02C02F3/02C02F3/28C02F3/30C02F2001/007C02F2209/42C02F2303/14
Inventor 游明山赵秉庆
Owner CHINA SHENHUA ENERGY CO LTD