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Paper making waste water disposal method by coagulant precipitation and coke filtration disposal

A papermaking industry wastewater, coagulation and sedimentation technology, applied in the direction of flocculation/sedimentation water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. High performance problems, to achieve the effect of low processing cost, simple process and wide application

Inactive Publication Date: 2007-09-19
朱龙
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can achieve a certain effect, it has a large investment and high energy consumption, and the effluent after treatment cannot meet the discharge standard, so its promotion and application are limited.

Method used

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  • Paper making waste water disposal method by coagulant precipitation and coke filtration disposal

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Embodiment Construction

[0018] Example 1. Take 1000 mL of wastewater from an industrial paper mill, and use 1# dosing system to mix by weight. Based on 2000 mL of water, add 40 g of 95% aluminum sulfate and 10 g of 95% iron sulfate. 40g of 95% magnesium sulfate, 6g of 95% manganese sulfate, and 4g of Lithopone with a purity of 90% are formulated into a "sewage treatment agent" with a concentration of 5wt% (developed by the inventor, patented and authorized). When the wastewater passes through the 1# pipeline reactor, the amount of "sewage treatment agent" added is 6mL according to the weight of the wastewater. While the wastewater passes through the 2# pipeline reactor, a polyacrylamide solution with a concentration of 0.1 wt% prepared by the 2# dosing system is added, and the addition amount is 3 mL. The 1# and 2# pipeline reactors are all pipe reactors with left, right, and left spiral structures, which can make the passing waste water and medicament mix uniformly. The wastewater passing through the re...

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Abstract

The papermaking waste water treating process includes first grate filtering waste water to eliminate floated matter, treating in regulating pond, pumping into No. 1 and No. 2 transfer line reactor, depositing in the depositing pond, dewatering sludge in a belt pressure filter, coke filtering of the clear water from the upper layer of the depositing pond inside the filtering coke tower. The key points of the papermaking waste water treating process includes adding 2-10 wt% concentration sewage treating agent comprising aluminum sulfate, ferric sulfate, magnesium sulfate and lithopone into waste water in the No. 1 transfer line reactor, and adding 0.05-0.2 wt% concentration polyacrylamide solution into waste water in the No. 2 transfer line reactor, with the added amount of the sewage treating agent and the polyacrylamide solution each being 0.03 % waste water weight. The present invention may be used widely in various kinds of papermaking waste water.

Description

Technical field [0001] The invention relates to a method for processing industrial wastewater, in particular to a method for processing wastewater from the papermaking industry. Background technique [0002] Water is a precious natural resource, the basic element of nature, and the material foundation on which humans and all living things depend for survival. With the development of industry and agriculture and the increase of population, the discharge of wastewater has increased rapidly. A large amount of wastewater is directly discharged into natural water bodies, causing serious water body pollution. The treatment of wastewater is urgent. [0003] The paper industry is a major polluter. According to statistics in 1995, the total drainage volume of China’s paper industry was 2.39 billion m2. 3 / a, second only to the annual discharge of the chemical industry and the steel industry, ranking third, the chemical oxygen consumption CODcr is 3.214 million t / a, accounting for 1 / 3 of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/52
Inventor 朱龙
Owner 朱龙
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