Printing and dyeing wastewater treatment process

A treatment process, printing and dyeing wastewater technology, applied in textile industry wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of poor effluent quality and high treatment costs, achieve good flocculation, good oxidation, and reduce The effect of chroma

Active Publication Date: 2016-04-13
景成环境科技(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current treatment of printing and dyeing wastewater has the problems of poor effluent quality and high treatment costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: In the initial state, the printing and dyeing wastewater with a CODGr of 1200 mg / L, a BOD5 of 250 mg / L, and a pH of 10 is filtered through a grid and then pumped into a regulating tank and adjusted to a pH of 8.0;

[0021] Step 2: Pump the wastewater in step 1 into the closed faeciform tank and put into activated sludge, and make the waste water stay in the facultative tank for 6 hours;

[0022] Step 3: pump the wastewater in step 2 into a high-efficiency anaerobic bioreactor, and remove impurities in the wastewater through anaerobic treatment;

[0023] Step 4: discharge the effluent from the high-efficiency anaerobic bioreactor.

Embodiment 2

[0025] Step 1: In the initial state, the printing and dyeing wastewater with a CODGr of 1000 mg / L, a BOD5 of 320 mg / L, and a pH of 11 is filtered through a grid and then pumped into a regulating tank and adjusted to a pH of 7.8;

[0026] Step 2: Pump the waste water in step 1 into the primary reaction tank, and add activated sludge. After standing for 0.5 hours, add Mg2SO4 with a waste water volume of 3g / m3 and feed 120V direct current at the same time, so that the waste water stays for 4 hours;

[0027] Step 3: pump the waste water in step 2 into the closed aerobic tank, and make the waste water stay in the aerobic tank for 4 hours;

[0028] Step 4: pump the wastewater in step 3 into a high-efficiency anaerobic bioreactor, and remove impurities in the wastewater through anaerobic treatment;

[0029] Step 5: Discharging the effluent from the high-efficiency anaerobic bioreactor.

Embodiment 3

[0031] Step 1: In the initial state, the printing and dyeing wastewater with a CODGr of 1400 mg / L, a BOD5 of 180 mg / L, and a pH of 9 is filtered through a grid and then pumped into a regulating tank and adjusted to a pH of 8.2;

[0032] Step 2: Pump the waste water in step 1 into the primary reaction tank, and add activated sludge, after standing for 0.5h, add FeSO4 with 1g / m3 of waste water and feed 140V direct current at the same time, make the waste water stay for 2.5h;

[0033] Step 3: pump the waste water in step 2 into the closed aerobic tank, and make the waste water stay in the aerobic tank for 5 hours;

[0034] Step 4: pump the wastewater in step 3 into a high-efficiency anaerobic bioreactor, and remove impurities in the wastewater through anaerobic treatment;

[0035] Step 5: Discharging the effluent from the high-efficiency anaerobic bioreactor.

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PUM

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Abstract

The invention discloses a printing and dyeing wastewater treatment process, and aims at solving the problems that for a traditional printing and dyeing wastewater treatment process, the effluent quality is poor, and the treatment cost is high. According to the technical scheme, the printing and dyeing wastewater treatment process comprises the following steps that wastewater is filtered by a grid and pumped into an adjusting tank, and the pH of the wastewater is adjusted; the wastewater treated in the first step is pumped into a primary reaction tank, activated sludge is put into the primary reaction tank, standing is conducted for 0.5 h, Mg2SO4 is added according to the wastewater quantity of 2-4 g / m<3>, FeSO4 is added according to the wastewater quantity of 1-3 g / m<3>, a direct current of 120-150 V is energized, and the wastewater stays for 2-4 h; the wastewater is pumped into a closed facultative tank, and the wastewater stays in the facultative tank for 4-7 h; the wastewater is pumped into an efficient anaerobic bioreactor, and sundries in the wastewater are removed through anaerobic treatment; effluent in the efficient anaerobic bioreactor is pumped into an efficient air flotation tank, and air flotation is conducted. The printing and dyeing wastewater treatment process is good in effluent quality and low in treatment cost.

Description

technical field [0001] The invention relates to the field of wastewater treatment, more specifically, it relates to a printing and dyeing wastewater treatment process. Background technique [0002] Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, and 80-90% of it becomes wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. Impurities, sand substances, inorganic salts, etc. [0003] Statistics show that in 2008, the discharge of textile industry wastewater was 2.3 billion tons, ranking third among all industries, accounting for 10...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/001C02F1/24C02F1/463C02F1/66C02F3/00C02F3/28C02F3/30C02F9/00C02F2103/30C02F2201/4617C02F2201/4618C02F2203/004C02F2209/02C02F2209/06C02F2301/08C02F2305/06
Inventor 陆志鸿高峰邓海静
Owner 景成环境科技(杭州)有限公司
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