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Flocculant for sewage treatment

A sewage treatment and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high price and high sewage treatment cost, and achieve the effect of low price, good flocculation effect and favorable growth

Inactive Publication Date: 2005-03-16
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Commercially available sewage treatment flocculants include polyferric sulfate aqueous solution, polyaluminum chloride aqueous solution or mixed aqueous solution of polyferric sulfate and polyaluminum chloride, etc. The disadvantage is that the price is relatively high, resulting in high sewage treatment costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: 99Kg sea water, 0.5kg polyferric sulfate, 0.5kg20 nanometer montmorillonite are stirred evenly, join in 1 ton of urban domestic sewage, stir 1 minute, leave standstill 5 minutes, its flocculation time ratio is with 100Kg Containing 0.5Kg polyferric sulfate and 0.5Kg polyaluminum chloride mixed aqueous solution for 1 minute, after 48 hours, the total nitrogen of the experimental group treated with this flocculant was reduced from 195mg / l to 160mg / l; while the control experimental group, That is to say, 100KG mixed aqueous solution containing 0.5Kg polyferric sulfate and 0.5Kg polyaluminum chloride is added to 1 ton of urban domestic sewage, stirred for 1 minute, left to stand for 5 minutes, and after 48 hours, its total nitrogen is reduced from 195mg / l to After 48 hours, the total phosphorus in the sewage of the experimental group decreased from 0.203mg / l to 0.05mg / l; the total phosphorus in the control experimental group decreased from 0.203mg / l to 0.150mg / ...

Embodiment 2

[0007] Example 2: Mix 99.4Kg of seawater brine, 0.5kg of polyaluminum chloride, 0.05kg of 20nm silicon dioxide and 0.05Kg of 50nm kaolin into 1 ton of chrome-plating waste water and stir for 1 minute , stand still for 45 minutes, and measure the content of hexavalent chromium in the sewage of this experimental group to drop from 320mg / l to 0.50mg / l. Control group: add 100 kg of aqueous solution containing 0.5 kg of polyaluminum chloride to 1 ton of chrome-plating wastewater, stir for 1 minute, and let it stand for 45 minutes. The content of hexavalent chromium in the wastewater is reduced from 320 mg / l to 64 mg / l.

Embodiment 3

[0008] Embodiment 3: the brine after 50kg seawater salt making and 48.9kg underground brine, 0.7kg polyaluminum sulfate, the talcum powder of 0.4kg7nm, stir evenly, add in 1 ton of food sewage, stir 1 minute, leave standstill 45 Minutes, the average value of sewage COD in the experimental group dropped from 21897mg / l to 166mg / l; while in the control group, 100Kg aqueous solution containing 0.5kg polyferric sulfate was added to 1 ton of food sewage, stirred for 1 minute, and left to stand for 45 minutes, the sewage The average value of COD decreased from 21897mg / l to 542mg / l; the average value of BOD5 in the experimental group sewage decreased from 11464mg / l to 98mg / l; and the average value of BOD5 in the control group decreased from 11464mg / l to 249mg / l.

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PUM

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Abstract

The invention provides a flocculant for sewage treatment comprising, one or two of seawater, underground bittern water, bittern water after salt preparation from seawater, one or two of poly ferric sulfate, polyaluminium chloride, and the mixture of poly ferric sulfate and polyaluminium chloride, one or two of silica, montmorillonite, kaolin, and talcum powder, wherein the weight percentage for each component is 98-99.5 : 0.03-1 : 0.03-1.

Description

technical field [0001] The invention relates to a novel sewage treatment flocculant. Background technique [0002] Commercially available sewage treatment flocculants include polyferric sulfate aqueous solution, polyaluminum chloride aqueous solution or mixed aqueous solution of polyferric sulfate and polyaluminum chloride, etc. The disadvantage is that the price is relatively high, resulting in high sewage treatment costs. Contents of the invention [0003] The purpose of the present invention is to provide a novel sewage treatment flocculant, which can overcome the above-mentioned shortcomings of the prior art. [0004] A new type of sewage treatment flocculant, which is characterized by mixing one or two of seawater, underground brine, brine after seawater salt production, polyferric sulfate, polyaluminum chloride, polyferric sulfate and polyaluminum chloride One or two kinds of silica, montmorillonite, kaolin, and talcum powder of 2-100 nanometers, and the weight perc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 李兰生
Owner OCEAN UNIV OF CHINA
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