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Treatment device and method for strengthening of removal effect on hardly degradable substances in printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment equipment, which is applied in textile industry wastewater treatment, anaerobic digestion treatment, sustainable biological treatment, etc. It can solve the problems of poor removal of refractory substances in printing and dyeing wastewater, and achieve reduced sludge output and stable effluent , the effect of short residence time

Active Publication Date: 2016-12-07
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to solve the problem of poor removal effect of refractory substances in printing and dyeing wastewater, the present invention provides a treatment device and method for enhancing the removal effect of refractory substances in printing and dyeing wastewater, combining anaerobic granular sludge, bio-filmed filler, bag Embed microbial carrier technology, and make full use of the characteristics of anaerobic UASB and BAF devices, which can not only avoid the impact of microorganisms on water quality, but also increase the treatment depth of wastewater

Method used

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  • Treatment device and method for strengthening of removal effect on hardly degradable substances in printing and dyeing wastewater
  • Treatment device and method for strengthening of removal effect on hardly degradable substances in printing and dyeing wastewater
  • Treatment device and method for strengthening of removal effect on hardly degradable substances in printing and dyeing wastewater

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Embodiment 1

[0033] In the embodiment, the raw water is taken from wastewater from a printing and dyeing enterprise. The wastewater includes pretreatment wastewater and dyeing wastewater. The pretreatment wastewater is mainly composed of wastewater generated by desizing, scouring, and rinsing processes. The dyeing wastewater is mainly composed of wastewater generated by dyeing and printing processes. The specific water quality is shown in Table 1.

[0034] Table 1 Water quality indicators of mixed wastewater from pretreatment wastewater and dyeing wastewater

[0035]

[0036] The raw water for printing and dyeing has a B / C ratio of less than 3, poor biodegradability, and belongs to refractory wastewater. The device of the invention is used to treat the wastewater. The device of the present invention includes anaerobic UASB pool I, anaerobic UASB pool II, a mixing pool, an internal circulation BAF reactor and an upflow BAF reactor, wherein the above-mentioned anaerobic UASB pool I and an...

Embodiment 2

[0056] In the examples, the raw water was taken from the wastewater of a printing and dyeing enterprise, and the quality of the influent water is shown in Table 3.

[0057] Table 3 Influent water quality indicators for printing and dyeing

[0058]

[0059] The raw water for printing and dyeing has a B / C ratio of less than 3, poor biodegradability, and belongs to refractory wastewater. The device of the invention is used to treat the wastewater. It includes an anaerobic UASB pool, a stabilizing pool, an internal circulation BAF reactor and an upflow BAF reactor, wherein the water outlets of the above-mentioned anaerobic UASB pool and the internal circulation BAF reactor are connected to the water inlet.

[0060] The above-mentioned anaerobic UASB reactor is made of plexiglass, with an effective volume of 12L, 80% of the reactor volume is filled with anaerobic granular sludge, and the main microorganisms in the anaerobic granular sludge used in the anaerobic UASB pool are the...

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Abstract

The invention discloses a treatment device and method for strengthening of the removal effect on hardly degradable substances in printing and dyeing wastewater. The printing and dyeing wastewater to be treated sequentially passes through an anaerobic UASB tank, a mixing tank, an internal circulating BAF tank and an upward flowing type BAF tank, the anaerobic tank adopts anaerobic granular sludge dominated by mesophile microorganisms, the internal circulating BAF tank operates in an upward flowing mode, and the packing surface is acclimatized and enriched with shortcut denitrifying bacteria and microorganisms, and the upward flowing type BAF tank adopts an embedded and fixed denitrifying bacterium and microorganism PEG carrier as a packing. The treatment device combines with the anaerobic granular sludge, a biological membrane colonization packing and an embedded microbial carrier technology, makes full use of the characteristics of anaerobic UASB and BAF devices, can avoid the phenomenon that microorganisms are impacted by the water, and also increases the wastewater treatment depth. The treatment device strengthens the removal effect on the hardly degradable substances in the printing and dyeing wastewater, the wastewater chroma removal rate of a UASB reaches 80%, the COD and BOD removal rate of a BAF reaches 78%, and treatment device has the advantages of being stable in treatment effect, low in sludge production volume, simple in operation and management and the like and has a popularization value.

Description

technical field [0001] The technical solution of the invention belongs to the field of wastewater treatment, and specifically relates to a treatment device and method for enhancing the removal effect of refractory substances in printing and dyeing wastewater. Background technique [0002] With the development of the printing and dyeing industry, various textiles, dyes and dyeing processes began to appear, and a large number of refractory substances were discharged into the water environment, such as surfactants, PVA, EG, etc. Most of the components of dyes are toxic and harmful components, which are difficult to remove in the conventional sewage treatment process of printing and dyeing wastewater. [0003] In recent years, different technologies have been researched and invented at home and abroad to treat the refractory substances in printing and dyeing wastewater. In terms of physical and chemical treatment processes, such as coagulation-precipitation, Fenton oxidation, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/00C02F3/02C02F103/30
CPCC02F3/00C02F3/02C02F3/28C02F3/2846C02F2103/30C02F2303/14Y02W10/10
Inventor 李超周仕华操家顺冯骞薛朝霞方芳费罗兰虞筠霄
Owner HOHAI UNIV
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