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Process for treating sewage and sewage and mud mixed liquid

A treatment method and mixed liquid technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of heavy membrane pollution and complicated preparation process, and achieve simple and convenient preparation process A large amount of effect

Inactive Publication Date: 2007-08-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a treatment method for sewage or sewage and sludge mixture, so as to solve the shortcomings of heavy membrane pollution and complicated preparation process in the prior art.

Method used

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  • Process for treating sewage and sewage and mud mixed liquid

Examples

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Effect test

Embodiment 1

[0025] There are secondary effluents from urban sewage treatment plants. The sewage contains suspended solids, colloidal substances, and dissolved organic matter. The water quality indicators are: COD: 120-150mg / L; Turbidity: 50-100NTU; pH: 7-8 .Introduction of sewage into the cesspool. First, the particle suspension is prepared, the suspended particles are kaolin with an average diameter of 1 μm, and the concentration of the suspended particles is 0.3 g / 1. Make the suspension flow through the membrane module in cross-flow, the cross-flow velocity is 0.5m / s, the transmembrane pressure difference is 0.2Mpa, and run for 10min to uniformly coat a layer of thin film with separation performance on the carrier membrane tube. Sewage is sent to the membrane module with a centrifugal pump, the cross-flow velocity is 1m / s, and the transmembrane pressure difference is 0.2Mpa. After being treated by the membrane module, the effluent COD: 50~60mg / L, turbidity: 0.1NTU. After long-term ope...

Embodiment 2

[0027] There is landfill leachate, which contains a large amount of humus, suspended matter, colloidal substances and dissolved organic matter, etc., and its water quality characteristic indicators are: COD: 500-800mg / L; SS: 190g / L; Turbidity: 200NTU; pH: 6.5-6.8. Direct landfill leachate into sewage ponds. The particle suspension is prepared, the suspended particles are wollastonite with an average diameter of 1 μm, and the concentration of the suspended particles is 0.3 g / l. According to the operation method and conditions of Example 1, a layer of film with separation performance is evenly coated on the carrier film tube. Use a centrifugal pump to send the landfill leachate into the membrane module, the cross-flow velocity is 1m / s, and the transmembrane pressure difference is 0.2Mpa. After being treated by the membrane module, the effluent COD: 150~190mg / L, turbidity: 0.1NTU. After long-term operation, when the filtrate flux drops greatly, the membrane module needs to be ...

Embodiment 3

[0029] There is a mixture of domestic sewage and sludge, in which the concentration of sludge is 4g / 1. The sewage and sludge mixture is introduced into the sewage tank. The particle suspension is prepared, the suspended particles are diatomite with an average diameter of 1 μm, and the concentration of the suspended particles is 0.3 g / l. According to the operation method and conditions of Example 1, a layer of film with separation performance is uniformly coated on the carrier film tube. A centrifugal pump is used to send the mixed solution of domestic sewage and sludge into the membrane module, the cross-flow velocity is 2m / s, and the transmembrane pressure difference is 0.2Mpa. After being treated by the membrane module, the turbidity of the effluent: 0.1NTU. After long-term operation, when the filtrate flux drops greatly, the membrane module needs to be cleaned. The method is: make the tap water cross-flow at a speed of 5m / s to flush the membrane tube, the particle coating...

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Abstract

A process for treating sewage and the mixture of sewage and sludge includes such steps as coating a layer of non-metal ore particles or colloid particles on the porous carrier pipe by cross-flow micro-filtering, an cross-flow filtering of said sewage or the mixture of sewage and sludge. Said porous carrier pipe can be easily regenerated by flushing with high-speed water and coating again.

Description

technical field [0001] The invention relates to a treatment method for sewage and a mixed solution of sewage and sludge, in particular to a treatment method for filtering sewage and a mixed solution of sewage and sludge with a dynamic coating membrane. Background technique [0002] Today, due to the rapid growth of the global population, the industry is developing rapidly. On the one hand, the human demand for water resources is expanding at an alarming rate; on the other hand, the increasingly serious water pollution has engulfed a large amount of water resources available for consumption. According to the report of the 2003 World Water Resources Conference: Many countries in the world are facing a water resource crisis, and the deterioration of the ecosystem and the destruction of biodiversity brought about by the water resource crisis will also seriously threaten human survival. The water resource crisis not only hinders the sustainable development of the world, but also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00
Inventor 奚旦立李俊陈季华卓琳云
Owner DONGHUA UNIV
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