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Lead-zinc smelting wastewater treatment method

A wastewater treatment, lead-zinc technology, applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems affecting the cleaning cycle and life of microfiltration and nanofiltration equipment, microfiltration, nanofiltration Serious pollution of filtration equipment, microfiltration and nanofiltration effects are not obvious, etc., to achieve obvious removal effect, convenient management, and reduce the degree of corrosion

Inactive Publication Date: 2016-10-12
SCI RES ACADEMY OF GUANGXI ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The workshop waste water of this method directly carries out microfiltration, nanofiltration after pressure filtration, does not remove the sludge, suspended matter, colloid and chloride ion etc. The pollution of nanofiltration equipment is serious, which seriously affects the cleaning cycle and life of microfiltration and nanofiltration equipment

Method used

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  • Lead-zinc smelting wastewater treatment method

Examples

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Effect test

Embodiment 1

[0029] Processing scale: 400m 3 / d.

[0030] Wastewater from a lead-zinc beneficiation plant contains harmful pollutants such as SS, zinc, lead, cadmium, iron, manganese, nickel, arsenic, antimony, mercury, etc. The wastewater is acidic, and the total discharge of initial rainwater and production wastewater is about 400m per day 3 / d, according to the requirements of the environmental protection department, it needs to be treated to the Class III water quality standard of the "Surface Water Environmental Quality Standard" (GB3838-2002).

[0031] The processing method includes the following steps:

[0032] A. Initial treatment of influent water: The total amount of high-concentration production wastewater collected in a lead-zinc beneficiation plant's rainwater collection tank 1 in one day and high-concentration production wastewater in a day is about 400m 3 , the rainwater and the production waste water are slowly flowed into the first regulating pond 3 together, and at the ...

Embodiment 2

[0042] Processing scale: 310m 3 / d.

[0043] Wastewater from a lead-zinc beneficiation plant contains harmful pollutants such as SS, zinc, lead, cadmium, iron, manganese, nickel, arsenic, antimony, mercury, etc. The wastewater is acidic, and the total discharge of initial rainwater and production wastewater is about 310m per day 3 / d, according to the requirements of the environmental protection department, it needs to be treated to the Class III water quality standard of the "Surface Water Environmental Quality Standard" (GB3838-2002).

[0044] The processing method includes the following steps:

[0045] A. Primary treatment of influent water: The total amount of initial rainwater collected in one day by the rainwater collection tank 1 of a lead-zinc beneficiation plant and the high-concentration production wastewater collected by the waste water collection tank 2 by one day is about 310m 3 , the rainwater and the production waste water are slowly flowed into the first regu...

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Abstract

The invention provides a lead-zinc smelting wastewater treatment method, which comprises the following steps: A, initial treatment of inflow; B, primary flocculation with an iron-based flocculating agent; C, secondary flocculation with polyacrylamide; D, filtration; E, adsorption with activated carbon; F, PH value regulation; G, membrane treatment: pumping water in a second regulation tank into a micro-filtration membrane device in a water pump pressurization form, pumping clear liquid filtered by the micro-filtration membrane device into a nanofiltration membrane device in the water pump pressurization form, pumping clear liquid filtered by the nanofiltration membrane device into a reverse osmosis device in the water pump pressurization form, and discharging or recycling clear liquid obtained by reverse osmosis of the reverse osmosis device after the clear liquid is detected to be qualified. According to the method, the iron-based flocculating agent and the polyacrylamide are adopted for performing flocculation twice, so that complete flocculation precipitation can be ensured; a filtration method combining micro-filtration, nanofiltration and reverse osmosis is adopted to deeply remove heavy metal ions such as lead and zinc ions in wastewater layer by layer, so that good removal effects are achieved.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for treating wastewater from lead-zinc smelting. Background technique [0002] The wastewater produced by lead-zinc smelting production enterprises mainly comes from the initial rainwater and high-concentration production wastewater in the factory area. Water and plant cleaning water, etc. The main pollution factors of wastewater from lead-zinc smelting enterprises are lead, zinc, cadmium, arsenic, antimony, etc. Because heavy metals cannot be degraded in the environment, they are easy to combine with various ligands in the environment to enhance their migration and diffusion capabilities, and then absorb them through plants and produce biomagnification, thereby endangering human health through the food chain. It is very harmful, and the country's efforts to control heavy metal pollution are increasing. According to the requirements of the nati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/18C02F101/20
CPCC02F9/00C02F1/001C02F1/283C02F1/441C02F1/442C02F1/444C02F1/5245C02F1/56C02F1/66C02F11/122C02F2101/20C02F2103/18
Inventor 陈志明黄喜寿唐丽黄月英谢鸿何建锋文麒麟蔡辉东王得迎梁潇栩梁国懿丁毅恒
Owner SCI RES ACADEMY OF GUANGXI ENVIRONMENTAL PROTECTION
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