Wastewater treatment process

A wastewater treatment and process technology, which is applied in the process of wastewater treatment, adsorbed water/sewage treatment, oxidized water/sewage treatment, etc., and can solve the problems of high operating costs, high technical content, and large investment.

Inactive Publication Date: 2010-03-31
杜小青
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  • Summary
  • Abstract
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Problems solved by technology

At present, domestic and foreign paper industry wastewater treatment methods mainly include alkali recovery method, electrodialysis, biochemical method, etc., but the above methods have problems such as high technical content, large investment, and high operating costs.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0004] Take 1000mL of water sample, add lime emulsion and stir, add Dy1 coagulant to stir, add 0.1% PAM solution to stir, then settle and separate, take supernatant 910mL, oxidize, record time, current, voltage, add medicine to coagulate, The supernatant was taken for sand filtration and carbon adsorption, and the CODCr and pH value of the effluent were measured. Seven kinds of coagulants, such as ferrous sulfate, polyferric sulfate, polyaluminum chloride, and Dy1, were selected successively. The coagulation experiment was carried out, and finally it was determined that the self-developed Dy1 had the best effect and was the most economical, so Dy1 was selected as the experiment. coagulant. The use of Dy1 coagulant has a better effect on papermaking wastewater, and the removal rates of CODCr and SS are higher. Dy1 coagulant is iron-magnesium composite organic compound solution, its concentration is 5%, and its molecular formula can be expressed as FexMgy(SO4)n-R.

[0005] The...

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PUM

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Abstract

The invention discloses a wastewater treatment process which comprises the following steps: sampling 1000mL of water, adding lime milk liquid and stirring, then adding Dyl coagulant and stirring, thenadding 0.1 percent PAM solution, stirring and then settling and separating, taking 910mL of supernate, oxidizing, recording the time, the electric current and the voltage, then dosing for coagulation, and taking the supernate for sand filtration and carbon adsorption. The wastewater is treated by adopting the treatment methods of coagulating, oxidizing, coagulating again, sand-filtering and carbon-adsorbing, therefore, the removal rate of CODCr is higher, and all indexes reach national discharge standards; and the method has simple process and small coverage area of a device.

Description

technical field [0001] The invention relates to wastewater treatment, in particular to a wastewater treatment process in the papermaking industry. technical background [0002] The paper industry is an industry with a large amount of water and drainage, and the discharged wastewater has a high pollution load and is one of the sources of pollution that needs to be resolved urgently. At present, domestic and foreign paper industry wastewater treatment methods mainly include alkali recovery method, electrodialysis, biochemical method, etc., but the above methods have problems such as high technical content, large investment, and high operating cost. It is difficult to popularize and popularize medium and small paper mills in my country. Therefore, the chemical coagulation oxidation method is selected to treat the pulping and papermaking wastewater. After the experiment, the experimental operating conditions were optimized and selected, and the dynamic test was carried out on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/72C02F1/28C02F103/28
Inventor 杜小青
Owner 杜小青
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