Method for treating chrome tanning wastewater with flocculant

A flocculant and chrome tanning technology, which is applied in the field of flocculant treatment of chrome tanning wastewater, can solve the problems of high production cost and high toxicity of residual monomers, and achieve the effects of reducing treatment cost, good water purification effect and broad spectrum of methods

Active Publication Date: 2016-08-17
SHANDONG HUASHENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its production cost is relatively high, and the synthetic organic polymer flocculant is highly toxic due to the residual monomer

Method used

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  • Method for treating chrome tanning wastewater with flocculant

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0019] The preparation method of PAFS is: take ferric sulfate (Fe 2 SO 4 ·7H 2 O), aluminum sulfate (Al 2 (S0 4 ) 3 ,·18H 2 0), stirring, heating, until ferrous sulfate and aluminum sulfate are all melted, until the brownish-red product is obtained. The mass ratio of Fe / Al in PAFS is 11.

[0020] Make PAFS into a 50g / L flocculant solution, add it to the chrome tanning wastewater, react for 15 minutes, and let it stand for 24 hours.

[0021] After PAFS was dried and pulverized in a drying oven at about 55°C, the potassium bromide tablet method was used to measure the infrared spectrum of the product with an infrared spectrometer. Using VECTOR-22 Fourier transform infrared spectrometer (Germany BRUKER company). As attached in the manual figure 1 shown.

[0022] From 3650-3200cm -1 It can be seen from the area of ​​the absorption peak that the hydroxyl content in PAFS is relatively high, which is caused by OH - produced by group stretching vibrations. OH contained ...

Embodiment 2

[0026] The preparation method of PAFS is: take ferric sulfate (Fe 2 SO 4 ·7H 2 O), aluminum sulfate (Al 2 (S0 4 ) 3 ,·18H 2 0), stirring, heating, until ferrous sulfate and aluminum sulfate are all melted, until the brownish-red product is obtained. The mass ratio of Fe / Al in PAFS is 13.

[0027] Make PAFS into a 50g / L flocculant solution, add it to the chrome tanning wastewater, react for 15 minutes, and let it stand for 24 hours.

[0028] In the experiment, the treated chrome tanning wastewater was left to stand for 24 hours and then subjected to low-speed centrifugation. The amount of sediment was obtained by subtraction. The supernatant was taken and the absorbance was measured with a 7230G spectrophotometer (Shanghai Precision Scientific Instrument Co., Ltd.) to determine the flocculant. Chromium removal in wastewater;

[0029] Calculated by precipitation, the amount of precipitation was 1.25 g, and the absorbance was 0.045. The calculated residual amount of chro...

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Abstract

The invention discloses a method for treating chrome tanned wastewater with a flocculant. The chrome tanned wastewater is added to the flocculant PAFS, reacted for 15 minutes, and then left to stand for 24 hours. The Fe / Al mass ratio in PAFS is 8-15. The invention treats chrome tanned wastewater The waste water method has broad spectrum, low toxicity, low raw material cost, good treatment effect and simple operation.

Description

technical field [0001] The invention relates to a chrome tanning wastewater treatment technology, in particular to a method for treating chrome tanning wastewater with a flocculant. Background technique [0002] At present, environmental pollution and its prevention and control have become a hot issue of global concern. With the rapid development of industry, the discharge of chromium-containing wastewater is increasing year by year, which directly threatens human health. Industries such as leather, electroplating, pigments, chemicals, refractory materials, and electronic screen panels are the main sources of chromium-containing wastewater, especially manufacturing In the leather industry, the chromium-containing wastewater produced by chrome tanning has the characteristics of large discharge and high chromium content, and the treatment of chrome tanning wastewater is an urgent problem to be solved. The treatment methods of chromium-containing wastewater at home and abroad ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 胡康马学军张佳
Owner SHANDONG HUASHENG CHEM TECH
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