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A method for treating heavy metal wastewater by removing complexes from granular sludge and ceramic membranes

A wastewater treatment system and heavy metal technology, which is applied in special compound water treatment, water/sludge/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of large sludge production, and achieve the reduction of sludge production and heavy metal pollution. Effect of high purity and reduced footprint

Inactive Publication Date: 2019-12-20
深圳市康源环境纳米科技有限公司 +1
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Problems solved by technology

[0007] The main purpose of the present invention is to overcome the deficiencies of the prior art, provide a heavy metal wastewater treatment system and method for removing complexes, effectively remove complexed heavy metal ions, and avoid the existing technology due to the addition of flocculants and coagulants The problem of large mud production caused by

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  • A method for treating heavy metal wastewater by removing complexes from granular sludge and ceramic membranes
  • A method for treating heavy metal wastewater by removing complexes from granular sludge and ceramic membranes

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Embodiment Construction

[0038] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0039] refer to figure 1 , In one embodiment, a heavy metal wastewater treatment system for removing complexes includes a stirred reactor 2 and a membrane separation tank 7 . The stirred reactor 2 has a stirrer 3, and the stirred reactor 2 is used for mixing and reacting the sludge wastewater containing complexed heavy metals, the pH adjusting liquid and the complex breaking agent under stirring, and making at least part of them under an appropriate pH value environment The complexed heavy metal ion is converted into a granular state; the membrane separation tank 7 is connected to the stirred reactor 2, and the membrane separation tank 7 is provided with a retention membrane, preferably a nano-ceramic membrane 8, and the nano-ceramic membrane 8 is used...

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Abstract

The invention relates to a heavy metal wastewater treatment system and method by removing complexes. The system comprises a stirring reactor and a membrane separation tank, wherein the stirring reactor is used for mixing complex-state heavy metal sludge wastewater, a pH regulation solution and a complex breaking agent to perform reaction in the stirring state, so that at least part of complex-state heavy metal ions are converted into the granular state; the membrane separation tank is connected with the stirring reactor; an interception membrane is arranged in the membrane separation tank, and used for intercepting granules in the mixed solution after reaction, the sludge granular layer formed by interception and the interception membrane further capture the granular-state heavy metal granules and the complex-state heavy metal ions which do not sufficiently react under the synergic actions, and the captured substance becomes the part of the sludge granular layer and participates in interception; and clear water passes through the interception membrane and is sent to a clear water tank by a membrane suction pump. The method can effectively remove the complex-state heavy metal ions and avoid the problem of high sludge output caused by the addition of the flocculant and coagulant aid.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a method for treating heavy metal waste water by removing complexes from granular sludge and ceramic membranes. Background technique [0002] According to data, my country produces about 40 billion tons of industrial wastewater every year, of which heavy metal wastewater accounts for about 60%. Heavy metal pollutants seriously pollute surface water and groundwater, and enter the human body through the food chain, endangering human health. Therefore, the state has formulated the "Twelfth Five-Year Plan" for the Comprehensive Prevention and Control of Heavy Metal Pollutants, and the treatment of heavy metal wastewater is urgent. [0003] With the development of surface treatment technology, electroplating and electroless plating are widely used. A large amount of complexing agents are used in these processes, which makes the composition of heavy metal wastewater more complex. Taking the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/52C02F1/66C02F101/20
CPCC02F1/44C02F1/52C02F1/66C02F9/00C02F2101/20C02F2305/04C02F2305/08
Inventor 苏子杰范小江张锡辉
Owner 深圳市康源环境纳米科技有限公司
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