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Method and device for recovering carbon source in urban sewage

A technology for recycling and treating urban sewage, applied in the directions of water/sewage multi-stage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. It is difficult to deal with problems such as the stability of the extraction agent, etc., and achieve the effects of high recovery rate, reduced membrane cleaning cost, and environmental friendliness

Inactive Publication Date: 2013-06-12
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for recovering and treating urban sewage carbon sources, which overcomes the narrow application range of using sugar as the extraction agent in the forward osmosis process in the prior art and cannot be used for large-scale water treatment, Using NH 4 HCO 3 As an extraction agent, it is difficult to maintain its stability, and the use of magnetic extraction agents is prone to agglomeration of magnetic particles, affecting its osmotic pressure and reducing the flux of produced water.

Method used

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  • Method and device for recovering carbon source in urban sewage
  • Method and device for recovering carbon source in urban sewage
  • Method and device for recovering carbon source in urban sewage

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Embodiment 1

[0037] A method for recovering and treating urban sewage carbon sources, comprising the following steps: filtering urban sewage (COD: 300-500, 1L) as a raw material solution and passing it into a forward osmosis membrane module (membrane orientation: the active layer faces the raw material solution, the supporting layer Facing the draw liquid, effective membrane area: 61.6m 2 ) side, under the action of the draw liquid on the other side of the forward osmosis membrane module, enters the draw liquid cylinder on the other side of the forward osmosis membrane module (fluid velocity on both sides of the membrane: 24cm / s, flow mode: cross flow), wherein The above-mentioned drawing solution is seawater (salinity: 3.5%, conductivity: 40000μs, 1L); the diluted seawater (conductivity: 28000μs) in the drawing solution cylinder is passed into the membrane separation module, and the produced water outlet of the membrane separation module Collect the produced water (COD 1000) into the upf...

Embodiment 2

[0039] A method for recovering and treating urban sewage carbon sources, comprising the following steps: filtering urban sewage (COD: 300-500, 1L) as a raw material solution and passing it into a forward osmosis membrane module (membrane orientation: the active layer faces the raw material solution, the supporting layer Facing the draw liquid, effective membrane area: 61.6m 2 ) side, under the action of the draw liquid on the other side of the forward osmosis membrane module, enters the draw liquid cylinder on the other side of the forward osmosis membrane module (fluid velocity on both sides of the membrane: 24cm / s, flow mode: cross flow), wherein The above-mentioned drawing solution is seawater (salinity: 3.5%, conductivity: 40000μs, 1L); the diluted seawater (conductivity: 28000μs) in the drawing solution cylinder is passed into the reverse osmosis membrane module (cross-flow constant pressure operation, operating pressure 3.0Mpa), collect the product water (conductivity50%...

Embodiment 3

[0041] A method for recovering and treating urban sewage carbon sources, comprising the following steps: filtering urban sewage (COD: 300-500, 1L) as a raw material solution and passing it into a forward osmosis membrane module (membrane orientation: the active layer faces the raw material solution, the supporting layer Facing the draw liquid, effective membrane area: 61.6m 2 ) side, under the action of the draw liquid on the other side of the forward osmosis membrane module, enters the draw liquid cylinder on the other side of the forward osmosis membrane module (fluid velocity on both sides of the membrane: 24cm / s, flow mode: cross flow), wherein The above-mentioned drawing solution is seawater (salinity: 3.5%, conductivity: 40000μs, 1L); the diluted seawater (conductivity: 28000μs) in the drawing solution cylinder is passed into the membrane distillation membrane module (cross-flow operation, the temperature difference between the two sides of the membrane 30°C), collect pr...

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Abstract

The invention relates to a method and a device for recovering a carbon source in urban sewage. The method comprises the following steps: by taking urban sewage as raw material liquid, after the urban sewage is filtered, feeding the filtered urban sewage into one side of a forward osmosis membrane assembly, and then feeding the filtered urban sewage into an absorbed liquid barrel at the other side of the forward osmosis membrane assembly under the action of absorbed liquid at the other side of the forward osmosis membrane assembly, wherein the absorbed liquid is seawater; and feeding the diluted seawater in the absorbed liquid barrel into a membrane separation assembly, collecting produced water at a produced water outlet of the membrane separation assembly, and flowing concentrated water back to the absorbed liquid barrel. According to the invention, urban sewage as raw material liquid and seawater as absorbed liquid enter a forward osmosis system, water in the raw material liquid seeps through a forward osmosis membrane, and pollutants are intercepted, so that the urban sewage is concentrated, the seawater is diluted, thereby simultaneously achieving effects of sewage concentration and seawater desalination, reducing the processing cost of the urban sewage, and realizing the recovery of organic carbon sources; and the diluted seawater is easy to desalinate, thereby reducing the cost of seawater desalination.

Description

technical field [0001] The invention relates to a sewage carbon source recycling method and device, in particular to a municipal sewage carbon source recycling method and device, belonging to the field of sewage treatment. Background technique [0002] Water shortage and energy crisis are limiting factors affecting global sustainable development, while the situation of water pollution is becoming increasingly serious. With the acceleration of urbanization and the increase of urban sewage discharge, urban sewage has become an important source of water pollution, and the problem of urban water pollution has been paid more and more attention. How to realize resource utilization of non-clean water sources in a low-cost way has become an important research topic. Membrane separation technology is widely used in the field of water treatment due to its wide application range, high separation efficiency, simple process, and low environmental impact. Among them, pressure-driven mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/08C02F9/14
CPCY02A20/124Y02A20/131
Inventor 王军李洁曾凡付侯得印栾兆坤
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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