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Preparation method of flocculant capable of removing phosphate from red mud

A flocculant, red mud technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Simple, mild reaction conditions

Inactive Publication Date: 2011-07-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a phosphorus removal flocculant and its production process in view of the deficiencies of the existing urban sewage and industrial wastewater phosphorus removal technology and the shortcomings of the high production cost of the flocculant used

Method used

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  • Preparation method of flocculant capable of removing phosphate from red mud

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Experimental program
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Effect test

Embodiment 1

[0035] Put 100kg of hydrochloric acid into the reaction kettle, pass steam to 80°C, add 25kg of bauxite, stir and react for 4 hours, then dilute to Baume density 17 (specific gravity about 1.13-1.14); then pass steam to 80°C, and add red mud at the same time Granules 70kg, stirring reaction, keep boiling for 4h. After the reaction, the brown high-efficiency phosphorus removal flocculant can be prepared by standing still for 24 hours.

[0036] Take the phosphorus removal flocculant prepared by the present invention, add it into the experimental wastewater with a phosphorus concentration of 1mg / L and 0.2mg / L, first stir it at 300rpm for 2min, then stir it at 100rpm for 30min, settle for 30min and then remove it. The supernatant was analyzed for phosphorus concentration, and the results are shown in the table below.

[0037]

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PUM

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Abstract

The invention provides a preparation method of a flocculant capable of removing phosphate from red mud, belonging to a preparation process of a flocculant for feed water and waste water treatment and relating to the field of sewage treatment in environment conservation. The preparation method comprises the following steps: adding alumyte and red mud particles in industrial hydrochloric acid, and performing the steps of mixing, reacting, aging and the like, so as to obtain the flocculant capable of removing phosphate. The flocculant produced by the preparation method is good in stability, and is suitable for the purification treatment of feed water and waste water; the effect of the flocculant is superior to that of the common polyaluminium chloride; and the preparation method is simple, is easy to achieve industrial production and has a wide open application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to the phosphorus removal technology in sewage treatment. technical background [0002] Phosphorous compounds are one of the causes of eutrophication in rivers and lakes. Phosphorus-containing compounds come from a wide range of sources, including urban domestic sewage, industrial wastewater, and phosphorus loss in soil. Therefore, taking effective measures to control the phosphorus content in urban domestic sewage and industrial wastewater can largely avoid the eutrophication of water bodies. [0003] At present, there are two main methods for the removal of phosphorus in wastewater: biological method and chemical method. Among them, biological phosphorus removal is based on the principle of phosphorus uptake and release by phosphobacteria, and phosphorus removal is achieved through aerobic-anaerobic alternating operation. Biological phosphorus removal is a relatively e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/58
Inventor 栾兆坤王琪贾智萍赵颖
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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