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Method for treatment and comprehensive utilization of silk production waste water

A technology for wastewater treatment and silk, which is applied in the textile industry wastewater treatment, osmotic/dialysis water/sewage treatment, ultrafiltration, etc. Benefit and economic benefits, achieve large-scale and production, and solve the effect of serious pollution

Inactive Publication Date: 2010-08-18
WUXI DEV TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic membrane is easy to pollute and has a short lifespan, which makes it difficult for ultrafiltration to be applied to the treatment of silk reeling wastewater on a large scale.
Because the macromolecular sericin in the wastewater is adsorbed on the surface of the organic membrane, the membrane pores are clogged and the pore size is reduced, resulting in organic membrane fouling and a rapid decline in membrane flux.
Generally, in about 30 minutes, the flux of the membrane has dropped by about one-third, and the cleaning of the membrane is time-consuming, and the membrane must be replaced when the pollution is serious. These are the reasons why it is impossible to treat silk wastewater on a large scale.

Method used

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  • Method for treatment and comprehensive utilization of silk production waste water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The silk production wastewater treatment and comprehensive utilization method of the present invention adopts the following process steps:

[0018] 1. Primary filtration: The wastewater discharged from cocoon cooking in the silk production process is alkaline, with a pH value of 10. Because there are many impurities in the wastewater, the cocoon cooking wastewater must be pre-filtered with a bag filter to quickly remove the solid particle impurities; bag filter cloth pore size: 350 mesh; filtration pressure: 0.1MPa.

[0019] 2. Inorganic membrane filtration: After the primary filtration is completed, use an inorganic ceramic membrane microfilter to perform microfiltration separation at room temperature. The pore size of the ceramic membrane is: 0.1um; the filtration pressure is: 0.4MPa; the flow rate is: 55L / H.M 2 ;By controlling the pressure and flow rate, the large molecular weight sericin protein forms a dynamic membrane with ultrafiltration capacity on the surface o...

Embodiment 2

[0033] The silk production wastewater treatment and comprehensive utilization method of the present invention adopts the following process steps:

[0034] Primary filtration: The wastewater discharged during cocoon cooking is alkaline, with a pH value of 9. The cocoon cooking waste water is firstly filtered with a bag filter. The filter cloth of the bag filter has a pore size of 400 meshes and a filtration pressure of 0.1 MPa.

[0035] Inorganic membrane microfiltration: use inorganic membrane microfilter to perform microfiltration separation at room temperature, inorganic membrane pore size: 1.0um; filtration pressure: 0.5MPa; flow rate: 60L / H.M 2 . The permeate from which large molecular weight sericin has been removed is further subjected to ultrafiltration separation with an organic membrane ultrafilter.

[0036] Organic membrane ultrafilter can further extract small molecule sericin; membrane material: polyethersulfone (PES) molecular weight cut off 5000; operating press...

Embodiment 3

[0039] The silk production wastewater treatment and comprehensive utilization method of the present invention adopts the following process steps:

[0040] Primary filtration: The wastewater discharged during the silk reeling production process is alkaline, with a pH value of 9.5. Now the cocoon cooking wastewater is firstly filtered with a bag filter. The filter cloth of the bag filter has a pore size of 500 mesh and a filtration pressure of 0.2MPa.

[0041] Inorganic membrane filtration: use inorganic ceramic membrane microfilter to perform microfiltration separation at room temperature, ceramic membrane pore size: 1.2um; filtration pressure: 0.7MPa; flow rate: 70L / H.M 2 .

[0042] Organic membrane ultrafiltration: the permeate from which large molecular weight sericin has been removed is further separated by ultrafiltration with an organic membrane ultrafilter; small molecule sericin can be further extracted; membrane material: polyethersulfone (PES) molecular weight cut-of...

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Abstract

The invention discloses a disposing production waste water of silk comprehensive utilization method in waste water treatment technology domain, which comprises the following steps: preliminary filtering silk waste water; filtering with inorganic film; ultra filtering with organic film; catching sericin concentrate liquid; cycling using and neutral discharging penetrating liquid. The invention adopts fractionation new technology through binding inorganic film and organic film phase, which can avoid maximal waste of sericin source.

Description

technical field [0001] The invention relates to a silk production wastewater treatment and comprehensive utilization method. Specifically, cocoon cooking, silk reeling and other wastewater meet discharge standards after treatment, and sericin is extracted therefrom, which belongs to the technical field of sewage treatment. Background technique [0002] my country is a big silk producing country and silk is the main raw material for silk production. Silk is an extremely important natural protein fiber, containing 70%-80% silk fibroin, 20%-30% sericin and a small amount of wax and inorganic things. Silk processing is mainly carried out in water medium, and a large amount of wastewater will be generated in the production of cocoon cooking, silk reeling, weaving, silk spinning, silk scouring, etc. Wastewater is mainly organic matter, and a small amount of inorganic salts. The COD value of these waste waters seriously exceeds the standard, which is 40-125 times of the national s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/14C02F1/44C02F103/30
Inventor 李亮
Owner WUXI DEV TECH