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Advanced processing reuse method for city standard-reaching sewage

An advanced treatment and urban technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the complex pretreatment process, reduce the content of suspended solids, and cannot adapt to high COD water quality and other issues, to achieve the effect of improving water production efficiency, reducing operating costs, and reducing chemical costs

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main purpose is to address the existing double-membrane devices that cannot adapt to high COD water quality, complex pretreatment process, multiple intermediate water tanks, security filtration, etc. Technical innovation and improvement of shortcomings such as reducing the content of suspended solids and controlling the pollution of microorganisms to the membrane system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Schematic diagram of the advanced treatment process of urban sewage discharged outside the standard figure 1 As shown, the water quality of the main parameters of the city’s up-to-standard sewage includes: pH8.2, chroma 10 times, conductivity 2500μs / cm, COD100mg / L, TOC33mg / L, hardness (calcium carbonate) 410mg / L, methyl orange base Degree (calcium carbonate meter) 600mg / L, Cl - 200mg / L, NH 4 + -N30mg / L, SO 4 2- 250mg / L, microbial content 7×10 4 cfu / ml, total iron 0.1mg / L.

[0074] like figure 2 As shown in the figure, metering pumps are used for pipeline dosing of urban sewage that meets the standards, and a certain concentration of sulfuric acid is used to adjust the pH of the feed water to 7.5. For the air flotation sedimentation tank with a funnel-shaped lower mud discharge structure under the road, the diaphragm microporous aeration should be placed at a position above 10cm from the top of the mud discharge funnel; Flow weir, under normal operating conditions...

Embodiment 2

[0082] Schematic diagram of the advanced treatment process of urban sewage discharged outside the standard figure 1 As shown, the main parameters of the city's sewage discharge water quality include: pH7.3, chroma 30 times, conductivity 2600μs / cm, COD120mg / L, TOC40mg / L, hardness (calcium carbonate) 430mg / L, methyl orange base Degree (calcium carbonate) 800mg / L, Cl - 250mg / L, NH 4 + -N40mg / L, SO 4 2- 280mg / L, microbial content 9×10 4 cfu / ml, total iron 0.3mg / L.

[0083] like figure 2 As shown in the figure, metering pumps are used for pipeline dosing of urban sewage that meets the standards, and a certain concentration of hydrochloric acid is used to adjust the pH of the feed water to 6.0. For the air flotation sedimentation tank with a funnel-shaped lower mud discharge structure under the road, the diaphragm microporous aeration should be placed at a position above 10cm from the top of the mud discharge funnel; Flow weir, under normal operating conditions, the valve i...

Embodiment 3

[0091] Schematic diagram of the advanced treatment process of urban sewage discharged outside the standard figure 1 As shown, the water quality of the main parameters of the city’s up-to-standard sewage includes: pH7.5, chroma 20 times, conductivity 2800μs / cm, COD110mg / L, TOC43mg / L, hardness (calcium carbonate) 480mg / L, methyl orange base Degree (calcium carbonate meter) 650mg / L, Cl - 220mg / L, NH 4 + -N50mg / L, SO 4 2- 350mg / L, microbial content 4×10 5 cfu / ml, total iron 0.2mg / L.

[0092] like figure 2 As shown in the figure, metering pumps are used for pipeline dosing of urban sewage that meets the standards, and a certain concentration of hydrochloric acid is used to adjust the pH of the feed water to 6.5. For the air flotation sedimentation tank with a funnel-shaped lower mud discharge structure under the road, the diaphragm microporous aeration should be placed at a position above 10cm from the top of the mud discharge funnel; Flow weir, under normal operating cond...

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Abstract

The invention discloses an advanced processing reuse method for city standard-reaching sewage, and a technology combining simple pretreatment, immersing type ultrafiltration and reverse osmosis is employed for advanced processing of standard-reaching city sewage. The method aims at the disadvantages that a conventional double-film apparatus cannot adapt to high-COD water, pretreatment flow is complex, multiple water boxes are arranged in an ultrafiltration reverse-osmosis technology flow, cartridge filtration is needed, a large amount of a flocculating agent, a bactericide, a reducing agent and the like need adding for reducing suspension content and controlling pollution of microbes to a film system, and the like, and innovation improvement is performed. The method is capable of substantially simplifying the technological flow, improving the operation period and reducing the operation cost, helps to improve the utilization rate of city standard-reaching outwards-discharged sewage and furthest reduce the discharge amount of wastewater, and has the advantages of high processing efficiency, long operation period, high water resource recovery rate, low investment operation cost and the like.

Description

technical field [0001] The invention relates to a method for advanced treatment and reuse of urban standard-reaching sewage, more specifically, a method for advanced treatment and reuse of urban standard-reaching sewage by using membrane technology. The invention belongs to the technical field of advanced treatment of urban sewage. Background technique [0002] Water is an indispensable and important resource in people's life and national economic construction, and it is an irreplaceable substance. With the development of economy, the growth of population and the improvement of people's material and cultural living standards, the demand for water is increasing all over the world, and the shortage of water resources has become a prominent problem in many countries. [0003] Municipal sewage is a general term for the water discharged into the urban drainage system by cities and towns, including domestic sewage, production wastewater and rainwater intercepted in the combined d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 李正琪杨永强谢梓峰彭海珠
Owner CHINA PETROLEUM & CHEM CORP
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