Urban sewage treatment and resource recycling method

A pretreatment technology for urban sewage and sewage, which is applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc. It can solve the problems of difficult dehydration and thorough degradation of sludge, and achieve viscous Reduced speed, less time-consuming, and shorter process

Active Publication Date: 2016-07-20
广西沛锋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a high-tech method for urban sewage treatment, recycling and utilization in order to solve the problems of "difficult to degrade thoroughly" and "difficult to dehydrate sludge" existing in the existing urban sewage treatment process

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for urban sewage treatment and resource recycling, comprising the following process steps:

[0035] (1) Sewage pretreatment, the municipal pipe network collects the dispersed urban sewage, collects the aggregate liquid, and performs sand and slag removal treatment on the sewage, and uses the neutralizing regulator sodium carbonate to adjust the pH of the sewage to 7.5, so that the SS value of the sewage is reduced to below 50mg / L, then use the height difference to make the sewage overflow into the sump, and the sewage will be continuously injected and stored in the sump. After the water is full, the supernatant will continue to overflow, and the overflowing sewage will flow into the sewage The water pipe and the sewage inlet pipe are connected to the water inlet distributor at the bottom of the electrolytic tank, so that the sewage is continuously injected into the bottom of the electrolytic tank from top to bottom and flows to various places at the bottom of th...

Embodiment 2

[0041] A method for urban sewage treatment and resource recycling, comprising the following process steps:

[0042](1) Sewage pretreatment, the municipal pipe network collects the dispersed urban sewage, collects the aggregate liquid, and then performs sand and slag removal treatment on the sewage, and uses the neutralizing agent lime milk to adjust the pH of the sewage to 8, so that the SS value of the sewage is reduced to less than 50mg / L, and then, use a high-performance, low-energy consumption and anti-corrosion horizontal stainless steel sewage pump to inject sewage into the sump, and the sewage in the sump is continuously injected and stored, and the supernatant overflows continuously after the water is full , the overflowing sewage flows into the sewage inlet pipe, and the sewage inlet pipe is connected to the water inlet distributor at the bottom of the electrolytic cell, so that the sewage is continuously injected into the bottom of the electrolytic cell from top to bo...

Embodiment 3

[0048] A method for urban sewage treatment and resource recycling, comprising the following process steps:

[0049] (1) Sewage pretreatment, the municipal pipe network collects the dispersed urban sewage, collects the aggregate liquid, and then performs sand and slag removal treatment on the sewage, and uses the neutralizing agent sodium hydroxide to adjust the pH of the sewage to 8.5, so that the SS value of the sewage Reduce to below 50mg / L, then, use high performance, low energy consumption and anti-corrosion engineering plastic sewage pump to inject sewage into the sump, the sump is continuously injected and stored sewage, and the supernatant overflows continuously after the water is full , the overflowing sewage flows into the sewage inlet pipe, and the sewage inlet pipe is connected to the water inlet distributor at the bottom of the electrolytic cell, so that the sewage is continuously injected into the bottom of the electrolytic cell from top to bottom and flows to each...

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Abstract

The invention relates to an urban sewage treatment and resource recycling method, which mainly includes three steps, i.e., sewage pretreatment, electrochemical treatment and precipitation treatment and resource utilization. The method can purify and recycle polluted water, and can transform, reduce and then recycle precipitated waste residue (sludge) as a resource to produce trace element biological humic acid organic fertilizer for sale for profit. When the method is adopted to electrochemically treat sewage, polymer flocculant polyacrylamide does not need to be used, electric energy is mainly consumed, 0.1 kwh of electricity or less is consumed by the treatment of each ton of sewage, and thereby sewage treatment cost is reduced by 30 percent or more; more outstandingly, the production of sludge is reduced by more than 50 percent, moreover, the viscosity of the sludge is greatly removed, so that the state of water wrapped in a sticky film of waste residue cannot occur, furthermore, sludge can be easily separated out and dehydrated by filter pressing, so that the moisture content of sludge can be decreased to less than 50 percent, consequently, two major problems, i.e., difficulty in using discharged water and toxic sludge siege, are solved, and recycling economic benefit is also created.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for urban sewage treatment and resource recycling. Background technique [0002] my country is a country with a shortage of water resources. At present, the increasingly severe water pollution and water resource shortages seriously restrict the development of my country's economy and society. Purifying urban sewage for reuse can save a lot of water resources. Urban sewage treatment plants bear the burden of treating most of the sewage (mainly domestic sewage) in the city, and in the process of degrading and removing water pollutants, they will inevitably produce a large amount of waste residue and sludge, which must be treated. Most of the sources of sewage from urban sewage treatment plants are domestic sewage from government agencies, units, schools, hospitals, troops, restaurants, residents, etc. In addition, some factories and enterprises may not meet the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/461C02F1/463C02F1/4672C02F1/52C02F1/66C02F9/00C02F2301/08
Inventor 黄名钟程洁
Owner 广西沛锋科技有限公司
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