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Water quality detecting method for tannery wastewater treatment process

A treatment process and water quality detection technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of unreported wastewater purification effect, and achieve the effect of low analysis cost, high sensitivity, and easy operation

Active Publication Date: 2015-04-01
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

However, at present, there is no report on the use of DOM in the tannery wastewater treatment process to characterize the wastewater purification effect.

Method used

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  • Water quality detecting method for tannery wastewater treatment process
  • Water quality detecting method for tannery wastewater treatment process
  • Water quality detecting method for tannery wastewater treatment process

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with drawings and embodiments.

[0021] In the first step, the tannery wastewater sample was centrifuged at 4000-5000 r / min for 5-10 minutes, and the supernatant was passed through a 0.45 μm filter membrane to obtain a dissolved organic matter (DOM) solution, which was stored for future use.

[0022] Tannery wastewater is a mixture of wastewater from the preparation section, tanning section and finishing section. The water quality characteristics of the water inlet samples are shown in Table 1. Tannery wastewater COD Cr It is 3696mg / L, mainly from the skin washing, hair removal, trimming, softening and other processes in the preparation section. The total chromium (31mg / L) is produced from the chrome tanning agent added in the tanning section, mainly trivalent chromium. The source of sulfide is the (liming) dehairing process in the preparation section, and the sodium sulfide added in this section is ...

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Abstract

The invention discloses a water quality detecting method for a tannery wastewater treatment process. The water quality detecting method comprises the following steps: firstly, centrifuging a water sample in the tannery wastewater treatment process, treating liquid supernatant with a 0.45-micron filter membrane to obtain a DOM solution sample; then, analyzing three-dimensional fluorescence spectrum of DOM in the sample, calculating total fluorescence intensity of DOM of the wastewater at different treatment sections; and representing the removal rate of organic pollutants in wastewater by the total fluorescence intensity of DOM of the wastewater. The water quality detecting method disclosed by the invention can be used for making up the defects in the prior art, has the characteristics of high sensitivity, good repeatability, simple operation, low analysis cost and the like, has a parental popularization and application value, and is beneficial to deeply analyzing a purifying mechanism of tannery wastewater.

Description

technical field [0001] The invention relates to the field of water quality detection in wastewater treatment process, in particular to a method for water quality detection in tannery wastewater treatment process with dissolved organic matter (DOM) as the evaluation target. Background technique [0002] Tannery wastewater is comprehensive wastewater discharged from the leather production process. It has the characteristics of deep color, high salinity, strong alkalinity, and large water volume. It is also called "three major wastewaters" together with papermaking wastewater and printing and dyeing wastewater. There are nearly 30,000 leather enterprises in my country (including more than 2,000 tanning enterprises), with an annual wastewater discharge of more than 200 million tons, and the wastewater treatment compliance rate is generally low. In recent years, the country has increasingly stringent requirements for wastewater discharge. In this environment, in addition to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 范春辉
Owner SHAANXI UNIV OF SCI & TECH