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Method for treating industrial park dyeing waste water by adopting modified attapulgite

A technology for modifying attapulgite and printing and dyeing wastewater, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low level of ATP development and utilization, and achieve improved sludge Settling performance, enhanced overall stability, and improved COD removal rate

Inactive Publication Date: 2016-12-07
HOHAI UNIV
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Problems solved by technology

[0004] ATP has a large reserve in Xuyi and Liuhe areas of Jiangsu Province in my country, but the current level of development and utilization of ATP is low. Therefore, it is necessary to develop a method for improving the efficiency of biological treatment of printing and dyeing wastewater in industrial parks by using modified ATP.

Method used

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  • Method for treating industrial park dyeing waste water by adopting modified attapulgite
  • Method for treating industrial park dyeing waste water by adopting modified attapulgite
  • Method for treating industrial park dyeing waste water by adopting modified attapulgite

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Embodiment 1

[0034] A sewage treatment plant in a township printing and dyeing industrial park in Huzhou, Zhejiang, in which printing and dyeing wastewater accounted for 70%, domestic sewage accounted for 20%, and other sewage accounted for 10%. The effluent of the hydrolytic acidification tank was used as the experimental object, and the COD concentration of the influent water quality was 200-300mg / L , the chromaticity is about 130 degrees, the pH is 7~8, and the ammonia nitrogen concentration is 8~15mg / L; the biological treatment process uses two identical SBR reactors R1 and R2 connected in parallel, and each experimental cycle is controlled by a time-controlled switch. 12h (including anaerobic stirring for 2h, aerobic aeration for 8h, precipitation for 1h, and standing for 1h), the aeration rate of the aeration head is 50L / h, the DO concentration control is about 4mg / L in the aerobic stage, and the DO concentration in the anaerobic stage The concentration control is about 0.2mg / L, and t...

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Abstract

The invention discloses a method for treating industrial park dyeing waste water by adopting modified attapulgite. The method comprises a start stage, a domestication stage and a run stage. According to the method, an required amount of the modified attapulgite is added to an activated sludge system, when the industrial park dyeing waste water is treated, the modified attapulgite can strengthen the capacity of activated sludge for degrading pollutants, improve the settleability of the sludge and improve the quantity and the activity of microbial populations, so that the entire stability of the sludge system is improved, and further the removal rate of a system for COD, ammonia nitrogen and colour intensity in the waste water is greatly increased. According to the method, the removal rate for the colour intensity of the industrial park dyeing waste water can reach 70%, the removal rate for the COD is increased by 8-10%, the removal rate for the NH4+ is increased by 6-10%, and removal rate of SV30 is reduced by 8-10%.

Description

technical field [0001] The invention relates to a method for treating printing and dyeing wastewater in industrial parks by using modified attapulgite, and belongs to the technical field of water body pollution control. Background technique [0002] Sewage plants in industrial parks that use printing and dyeing wastewater as the main wastewater have complex influent components, large changes in water volume and quality, and poor biochemical properties. At present, the treatment of printing and dyeing wastewater at home and abroad is mainly based on aerobic biological treatment, supplemented by necessary physical and chemical pretreatment. The treatment effect of chroma is poor, and the water quality of the treated water is difficult to meet the increasingly serious sewage discharge standards. [0003] Attapulgite (ATP), also known as palygorskite, is a hydrous magnesium-rich aluminum silicate clay mineral, known as "the soil of a thousand soils, the king of ten thousand soi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34
CPCC02F3/301C02F3/341
Inventor 周仕华李超操家顺费罗兰虞云霄钟天意
Owner HOHAI UNIV
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