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Treating and reusing method for ramie degumming waste water

A waste water and degumming technology, used in heating water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as difficulty in achieving ideal treatment effects, and achieve increased treatment costs, high transparency, and good effects.

Inactive Publication Date: 2006-08-23
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These conventional treatments are difficult to achieve the ideal treatment effect, and there are few reports on the realization of discharge standards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 4g FeSO 4 ·7H 2 O, stirred for 5min; added 4mL H 2 o 2 , Stir for 30min; then add 5g of quicklime, stir for 30min, and settle for 2h. The pH of the effluent is 13.5, the COD is 6500mg / L, the chroma is 800 degrees, the COD removal rate is 69%, and the chroma removal rate is 96%. The effluent is clear and has high alkalinity, which can meet the requirements for reuse in the smelting production process.

Embodiment 2

[0017] In 1L of mixed water of scouring wastewater and pickling wastewater (pH9.1, COD10200mg / L, chromaticity 8000 degrees, water temperature 55 ℃), add 2g FeSO 4 ·7H 2 O, stirred for 5min; added 2mL H 2 o 2 , Stir for 30min; then add 3g of quicklime, stir for 30min, and settle for 2h. The pH of the effluent is 10.2, the COD is 5300 mg / L, the chroma is 600 degrees, the COD removal rate is 48%, and the chroma removal rate is 92%. The effluent is clear and can meet the requirements of biological treatment after being mixed with wastewater generated in other processes.

Embodiment 3

[0019] Add 2g of FeSO to 1L of mixed water (pH9.5, COD6500mg / L, chromaticity 4000 degrees, water temperature 55°C) of scouring waste water and scouring washing water 4 ·7H 2 O, stirred for 5min; added 2mL H 2 o 2 , Stir for 30min; then add 3g of quicklime, stir for 30min, and settle for 2h. The pH of the effluent is 11.5, the COD is 2400mg / L, the chroma is 300 degrees, the COD removal rate is 63%, and the chroma removal rate is 93%. The effluent is clear and has a high alkalinity, which can be reused in the scouring process or mixed with wastewater from other processes for biological treatment.

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PUM

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Abstract

The present invention provides treating and reusing process for ramie degumming waste water. The technological scheme includes the following steps: adding FeSO4íñ7H2O in the amount of 0.1-1 wt% of waste water into ramie degumming waste water and stirring for 1-30 min; adding H2O2 in the amount of 0.1-1 wt% and stirring for 1-60 min; adding lime in the amount of 0.2-1.5 wt% and stirring for 1-60 min; and depositing for 1-24 hr to obtain water for reuse in the production or mixing with other waste water to reduce pollutant concentration.

Description

technical field [0001] The present invention relates to a wastewater treatment method. In particular, a method for treating and reusing ramie degumming wastewater Background technique [0002] The ramie processing industry provides excellent textile raw materials for the textile industry. my country is the largest ramie planting and processing country in the world, and its annual output accounts for about 80% of the world's total output. With the deepening of reform and opening up and the increase in the demand for ramie products in the international market, the ramie textile industry in my country continues to expand. Many ramie textile enterprises have been built and expanded in the main hemp-producing areas of southern my country. It is reported that by 2004, the country had an annual production capacity of 250,000 tons of dry hemp. To produce about 60m per ton of dry hemp 3 According to the high-concentration degumming wastewater, the annual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/04
Inventor 卢进登陈红兵
Owner HUBEI UNIV
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