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Biological composite flocculating agent for adsorbing heavy metal ions in heavy metal wastewater and applications thereof

A composite flocculant and heavy metal ion technology, which is applied in water pollutants, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of increasing desalination process, high investment cost, secondary pollution, etc., to achieve Enhanced application range, simple treatment method, and enhanced adsorption capacity

Inactive Publication Date: 2018-06-29
水友环保技术(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the inorganic and organic flocculants used in large quantities can meet the industrial requirements to a certain extent, the dosage is large and the investment cost is high, and the inorganic flocculants are easy to bring a large amount of inorganic ions into the treated liquid in practical applications, which increases the desalination process. , easy to cause secondary pollution

Method used

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  • Biological composite flocculating agent for adsorbing heavy metal ions in heavy metal wastewater and applications thereof
  • Biological composite flocculating agent for adsorbing heavy metal ions in heavy metal wastewater and applications thereof
  • Biological composite flocculating agent for adsorbing heavy metal ions in heavy metal wastewater and applications thereof

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Effect test

Embodiment 1

[0036] Apply the biological composite flocculant of the present invention to the adsorption of heavy metal ions in heavy metal wastewater, and the treated water samples mainly contain Cr3 + , Zn 2+ 、Ni 2+ and Cu 2+ Several ions, the processing results are shown in the table below, unit mg / L, pH6.1:

[0037]

[0038]

Embodiment 2

[0040] Apply the biological composite flocculant of the present invention to the adsorption of heavy metal ions in heavy metal wastewater, and the treated water samples mainly contain Cr3 + , Zn 2+ 、Ni 2+ and Cu 2+ Several ions, the processing results are shown in the table below, unit mg / L, pH6.1:

[0041] water type

Embodiment 3

[0043] Apply the biological composite flocculant of the present invention to the adsorption of heavy metal ions in heavy metal wastewater, and the treated water samples mainly contain Cr3 + , Zn 2+ 、Ni 2+ and Cu 2+ Several ions, the processing results are shown in the table below, unit mg / L, pH6.1:

[0044] water type

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Abstract

The invention relates to a biological composite flocculating agent for adsorbing heavy metal ions in heavy metal wastewater and applications thereof. The composite flocculating agent is prepared by compounding polyglutamic acid, polymeric aluminum chloride, and poly(aspartic acid) according to a weight ratio of 1: 4-6: 15-17. When the flocculating agent is used, at first, the pH value of heavy metal wastewater is adjusted to 6-9; then the biological composite flocculating agent is added into the heavy metal wastewater, the system is vibrated and stirred for 15 to 20 minutes, after vibration and stirring, centrifugal separation or static settlement is performed, and the flocculent precipitates that adsorb heavy metal ions are recovered and processed. The adsorbing performance and application range of the biological composite flocculating agent are both enhanced. The processing mode is simple and environmentally friendly. Furthermore, polyglutamic acid and poly(aspartic acid) can be easily degraded by organisms and will not generate secondary pollution; the preparation and application are convenient, and the cost is low.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a biological composite flocculant used for heavy metal ion adsorption in heavy metal wastewater and its application, belonging to the technical field of sewage treatment. Background technique [0002] Polyglutamic acid (PGA) is a water-soluble biodegradable biopolymer. The flocculant has the characteristics of non-toxic, environment-friendly and high efficiency. It can effectively adsorb heavy metal ions in heavy metal wastewater, and is an excellent green water treatment reagent. [0003] Polyaspartic acid (PASP) is a water-soluble amino acid degradable polymer, which can chelate multivalent metal ions such as calcium, magnesium, copper, iron, etc., especially can change the crystal structure of calcium salt to form soft scale, Therefore, it has good adsorption of heavy metal ions and anti-scaling properties. [0004] Polyaluminum chloride (PAC) is an inorganic polymer coagulant, non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/28B01J20/26C02F101/20
CPCB01J20/0248B01J20/0288B01J20/262C02F1/281C02F1/285C02F1/5236C02F1/56C02F2101/20
Inventor 迟波谈火英戴玲
Owner 水友环保技术(苏州)有限公司
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