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Treatment method of heavy metal waste water

A treatment method and technology for heavy metals, which are applied in water treatment parameter control, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of limited promotion, low removal rate of heavy metals, etc. Effect

Active Publication Date: 2018-11-30
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current removal rate of heavy metals by biological methods is low, which limits the promotion of this method.

Method used

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  • Treatment method of heavy metal waste water
  • Treatment method of heavy metal waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The initial content of COD in heavy metal wastewater is 600mg / L, Ni 2+ The initial content is 100-150mg / L, and the initial content of SS is 200mg / L;

[0040] The heavy metal wastewater is first homogenized through the regulating tank, and the hydraulic retention time of the heavy metal wastewater in the regulating tank is 10h;

[0041] The heavy metal wastewater treated in the regulating tank enters the anaerobic-aerobic integrated membrane bioreactor (hereinafter referred to as AOMBR). The membrane filaments filled in the reactor are hollow fiber membranes containing quinone groups. The sludge concentration in the AOMBR reactor It is 3000m g / L; AOMBR operates according to the following parameters: anaerobic treatment without aeration, hydraulic agitation for 1h, redox potential of -450mv; then aerobic treatment for 1h, aerobic treatment with aeration, no agitation, dissolved oxygen Controlled at 1mg / L, the aerobic treatment process passes through the membrane filament...

Embodiment 2

[0048] The initial content of COD in heavy metal wastewater is 310mg / L, Zn 2+ The initial content is 40mg / L, and the initial content of SS is 50mg / L;

[0049] The heavy metal wastewater is first homogenized through the regulating tank, and the hydraulic retention time of the heavy metal wastewater in the regulating tank is 12h;

[0050] The heavy metal wastewater treated in the regulating tank enters the anaerobic-aerobic integrated membrane bioreactor (hereinafter referred to as (AOMBR), the membrane filaments filled in the reactor are hollow fiber membranes containing quinone groups, and the sludge in the AOMBR reactor The concentration is 3000m g / L; AOMBR operates according to the following parameters: anaerobic treatment without aeration, hydraulic stirring for 50min, redox potential of -400mv; then aerobic treatment for 50min, aeration during aerobic treatment, no stirring, dissolved Oxygen is controlled at 2mg / L, and the aerobic treatment process passes through the memb...

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Abstract

The invention provides a treatment method of heavy metal waste water. The treatment method comprises the following steps: firstly homogenizing heavy metal waste water, so that the water quality of theheavy metal waste water from different procedures can be balanced, performing the anaerobic-aerobic circular treatment for the heavy metal waste water after the anaerobic treatment in a membrane bioreactor, reducing the heavy metal ions under the effect of microorganisms in the anaerobic treatment process, wherein the membrane bioreactor is filled with hollow cellulose comprising benzoquinonyl, the benzoquinonyl in the cellulose is used as an electron medium to accelerate the enzymatic reduction reaction of the heavy metal ions in the anaerobic process, so that a purpose of efficiently removing the heavy metal ions can be achieved; and in the aerobic treatment process, COD and SS in the waste water can be further removed, so that the produced water can reach the grade-A emission standard.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for heavy metal wastewater. Background technique [0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metal (such as cadmium, nickel, mercury, zinc, etc.) wastewater is one of the most serious environmental pollution and one of the most harmful industrial wastewater to humans, and its water quality and quantity are related to the production process. Heavy metals in wastewater generally cannot be decomposed and destroyed, but can only transfer their existing positions and change their physical and chemical forms. The treatment method is to first reform the production process, use no or less toxic heavy metals, and use chemical precipitation and ion exchange methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/20
CPCC02F3/1273C02F3/2853C02F3/301C02F2101/20B01D63/02B01D2325/02834B01D69/08B01D69/02B01D71/34B01D71/82C02F2209/04C02F2209/22Y02W10/10B01D2325/02833
Inventor 严滨
Owner XIAMEN UNIV OF TECH
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