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Compound agent for removing lead from waste water

A technology for compounding chemicals and wastewater, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effects of secondary pollution, high lead removal efficiency and remarkable treatment effect

Inactive Publication Date: 2013-04-17
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for living organisms, such as microorganisms, their application is greatly limited due to their long action time and low reaction efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] (1) Adding polyaluminum chloride and polyacrylamide flocculants to the lead-containing wastewater to carry out flocculation and sedimentation treatment of the wastewater; (2) Adding 50 ppm of organic acid and inorganic salt composite agents to the wastewater for removing suspended particles, in which nicotinic acid 15ppm, 15ppm citric acid, 10ppm cyclopropaneacetic acid, and 10ppm copper sulfate are fully stirred evenly, so that the lead in the waste water exists in the form of divalent; (3) The waste water is lifted into the pressure dissolved air tank with a steam-water mixing pump, and then the air valve is released. The soda-water mixture is released, and rises with the tiny bubbles until a layer of greasy substance is formed on the surface of the wastewater; (4) scrape off the upper layer of greasy substance with a slag scraper, which can reduce the lead in the wastewater from 397mg / L to 0.2mg / L, lead removal rate reached 99.94%.

example 2

[0022] (1) Adding polyaluminium chloride and polyacrylamide flocculant to wastewater containing lead to carry out flocculation and sedimentation treatment; (2) Adding 65ppm organic acid and inorganic salt composite agent to wastewater for removing suspended particles, wherein 2- Amino-6-methylbenzoic acid 20ppm, vinyl sulfonic acid 20ppm, sodium sulfide 25ppm are fully stirred evenly, lead in the waste water is with the form of bivalence; Release the air valve again, the steam-water mixture is released, and rises along with the tiny bubbles, until a layer of greasy substance is formed on the surface of the wastewater; (4) scrape off the upper layer of greasy substance with a slag scraper, which can make the lead in the wastewater from 425mg / L dropped to 0.085mg / L, lead removal rate reached 99.98%.

example 3

[0024] (1) Adding polyaluminum chloride and polyacrylamide flocculant to wastewater containing lead to carry out flocculation and sedimentation treatment; (2) Adding 80ppm organic acid and inorganic salt composite agent to wastewater for removing suspended particles, wherein citric acid 25ppm, vinyl sulfonic acid 15ppm, and ferrous sulfate 40ppm are fully stirred evenly, so that the lead in the waste water exists in the form of divalent; (3) The waste water is lifted into the pressure dissolved air tank by the soda-water mixing pump, and then the air valve is released, and the soda-water mixture Released, along with the tiny bubbles rise up until a layer of greasy substance is formed on the surface of the wastewater; (5) Scrape off the upper layer of greasy substance with a slag scraper, which can reduce the lead in the wastewater from 378mg / L to 0.038mg / L , Lead removal rate reached 99.99%.

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PUM

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Abstract

The invention discloses a compound agent for removing lead from waste water, and belongs to the field of sewage treatment in environmental protection. The compound agent is formed by compounding organic acid and inorganic salt, wherein organic acid is two or more of nicotinic acid, citric acid, cyclopropylacetic acid, 2-amino-6-methyl benzoic acid and ethylenesulfonic acid; and inorganic salt is one or two of copper sulfate, sodium sulfide, magnesium sulfide and ferrous sulfate. The compound agent has the characteristics that raw material sources are extensive; the price is low; the agent dosage is smaller; the operating cost is low; no secondary pollution is generated in a treatment process; the lead removal efficiency is high; and the removal rate can reach above 99.9%.

Description

technical field [0001] The invention relates to a compound agent for removing lead in waste water, which belongs to the field of waste water treatment in environmental protection. Background technique [0002] Lead-containing wastewater mainly comes from mineral processing, petroleum processing, electroplating and other industries. Lead and its compounds are non-degradable environmental pollutants, which can flow into the environment in large quantities through waste water, waste gas, and waste residues, and directly or indirectly enter the human body through the food chain, soil, water, and air, causing damage to the hematopoietic system, causing anemia, nervous system failure, etc. Slight neuritis can also flow into the brain tissue with the blood, damage the cerebellum and cerebral cortex cells, interfere with metabolic activities, and cause brain damage. [0003] At present, chemical precipitation and ion exchange methods are generally used in the industry to treat heav...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F9/04
Inventor 汪巍
Owner CHANGZHOU UNIV