Purity and turbidity separation collection method of printing and dyeing wastewater with conductivity as index

Abstract

The invention discloses a separation collection method of printing and dyeing wastewater with conductivity as an index and relates to separation collection and classification treatment of the printing and dyeing wastewater. For the problems of serious pollution and increasing treatment loads caused by concentrated discharge of the printing and dyeing wastewater, the printing and dyeing wastewater is divided into "light wastewater" and "heavy wastewater" which are respectively collected through two pipelines. The separation collection method specifically comprises the steps of: mounting an online conductivity meter on a discharge pipe orifice; utilizing the online conductivity meter in combination with an electromagnetic valve; controlling on and off of the electromagnetic valve by setting conductivity so as to realize automatic separation collection of the printing and dyeing wastewater. A separation standard is determined by investigating a workshop and monitoring process drainage water; when the conductivity of wastewater is not less than 3000 us/cm, the wastewater is divided into "heavy wastewater"; when the conductivity of wastewater is less than 3000 us/cm, the wastewater is divided into "light wastewater". By adopting the method to collect the wastewater, the subsequent treatment process load can be effectively reduced, the pollution rate of deep treatment of a double-membrane method is decreased, and the requirements of stable up-to-standard discharge of "heavy wastewater" and recycling of "light wastewater" are satisfied; the mounting is convenient, the operation is simple, the separation efficiency is high and the separation accuracy is 98%.

Description

technical field [0001] The invention belongs to a waste water treatment and collection method, in particular to a printing and dyeing waste water turbidity separation collection method with electrical conductivity as an index. Background technique [0002] Printing and dyeing wastewater has always been the focus and difficulty of wastewater treatment process research due to its large discharge volume and high difficulty in treatment. According to the survey, there are nearly 3,000 textile printing and dyeing enterprises in the Taihu Lake Basin, and the annual discharge of printing and dyeing wastewater is 350 million tons. One of the key polluting industries. [0003] As we all know, a large amount of dyes and auxiliaries are used in the printing and dyeing process, resulting in complex components of printing and dyeing wastewater and high content of refractory organic matter. According to the specific production process, printing and dyeing wastewater can be divided into ...

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Problems solved by technology

[0011] Technical problem to be solved: the present invention overcomes the shortcomings of low quality separation efficiency, lo

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