Unlock instant, AI-driven research and patent intelligence for your innovation.

Deep treatment method of heavy metal waste water

It is an advanced treatment and heavy metal technology, which is applied in water/sewage treatment, multi-stage water/sewage treatment, biological water/sewage treatment, etc. It can solve the problems of complex water quality components, high operating costs, and large dosage of heavy metal sewage. Achieve the effects of separation and recovery, increase degradation rate, and reduce power consumption

Active Publication Date: 2018-09-04
山东国辰实业集团机电设备有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal sulfide precipitation also tends to form colloidal precipitates, causing separation problems during precipitation and filtration
[0004] In addition, the water quality of heavy metal sewage is complex, usually with high suspended solids and turbidity, high salt content, high chemical oxygen demand, and many types of heavy metals
At present, heavy metal sewage treatment mainly uses physical methods, chemical methods and biological methods; physical methods include multi-effect evaporation, ionization, reverse osmosis, ultrafiltration, nanofiltration, etc., which require a large amount of power resources and are expensive to operate; The method usually adds polymer oxidants and chemical flocculants to the water, which has the disadvantages of large dosage, long standing time, and secondary pollution; the biochemical method has the advantages of stability and low cost in domestic sewage treatment, but it cannot handle High heavy metal content, high organic matter concentration and high salinity sewage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Deep treatment method of heavy metal waste water
  • Deep treatment method of heavy metal waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for advanced treatment of heavy metal sewage, the steps of which are as follows:

[0038] (1) Pretreatment: The heavy metal sewage is sorted by coarse mechanical grids, and then crushed impurities by fine mechanical grids, and then enters the cyclone grit chamber for treatment to remove sundries, some organic matter, sand, cinder and other dense inorganic substances. Particles, so as to prevent these impurities from affecting the normal progress of the subsequent treatment process;

[0039] (2) Enhanced coagulation: the effluent of the cyclone grit chamber is passed into the coagulation air flotation machine, and 0.2kg of biological flocculant is added per ton of water to drive away grease, colloid and solid suspended matter, and reduce BOD and COD in sewage content;

[0040] (3) Pulse discharge plasma-photocatalytic synergistic degradation of organic matter: adjust the pH value of the effluent of the coagulation air flotation machine to 6.8, and pass it into ...

Embodiment 2

[0052] A method for advanced treatment of heavy metal sewage, the steps of which are as follows:

[0053] (1) Pretreatment: The heavy metal sewage is sorted by coarse mechanical grids, and then crushed impurities by fine mechanical grids, and then enters the cyclone grit chamber for treatment to remove sundries, some organic matter, sand, cinder and other dense inorganic substances. Particles, so as to prevent these impurities from affecting the normal progress of the subsequent treatment process;

[0054] (2) Enhanced coagulation: the effluent of the cyclone grit chamber is passed into the coagulation air flotation machine, and 0.3kg of biological flocculant is added per ton of water to drive away grease, colloid and solid suspended matter, and reduce BOD and COD in sewage content;

[0055] (3) Pulse discharge plasma-photocatalytic synergistic degradation of organic matter: adjust the pH value of the effluent of the coagulation air flotation machine to 7.2, and pass it into ...

Embodiment 3

[0067] A method for advanced treatment of heavy metal sewage, the steps of which are as follows:

[0068] (1) Pretreatment: The heavy metal sewage is sorted by coarse mechanical grids, and then crushed impurities by fine mechanical grids, and then enters the cyclone grit chamber for treatment to remove sundries, some organic matter, sand, cinder and other dense inorganic substances. Particles, so as to prevent these impurities from affecting the normal progress of the subsequent treatment process;

[0069] (2) Enhanced coagulation: the effluent of the cyclone grit chamber is passed into the coagulation air flotation machine, and 0.5kg of biological flocculant is added per ton of water to drive away grease, colloid and solid suspended matter, and reduce BOD and COD in sewage content;

[0070] (3) Pulse discharge plasma-photocatalytic synergistic degradation of organic matter: adjust the pH value of the effluent of the coagulation air flotation machine to 9.0, and pass it into ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a deep treatment method of heavy metal waste water. The method comprise the following steps of (1), pretreatment; (2), enhanced coagulation; (3) organic matter degradation through pulsed discharge plasma-photocatalysis synergy; (4) nanoscale zero-valent iron treatment; (5) wire mesh cage frame cellulose aerogel adsorption and (6) ultrafiltration / nanofiltration-hyperfiltration integrated membrane treatment. The deep treatment method of the heavy metal waste water has the advantages that the technology is simple, the operational cycle is short, the waste water recovery rate is high, the removal efficiency for various heavy metal waste water is better, suspended solids, organic matters, salts and other pollutants contained in the heavy metal waste water can be thoroughly removed, the removal of heavy metals has universality, the recovery rate of the heavy metals is high, the economic benefit is good, the technology flexibility is high, the shock resistance load capacity is high, and the method is suitable for the heavy metal waste water treatment in electricity, photovoltaic, photo-electricity, semiconductor, electron, pharmacy, metallurgy, petrochemical and other fields.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for advanced treatment of heavy metal sewage. Background technique [0002] The absolute discharge of heavy metals in sewage discharge accounts for about 71.23% of the total sewage discharge, and its impact on the environment is no less than that of COD discharge from the paper industry. Taking electroplating wastewater as an example, in addition to cyanide (CN - ) wastewater and acid-base wastewater, it also contains heavy metal ions such as chromium (Cr), nickel (Ni), cadmium (Cd), copper (Cu), zinc (Zn), resulting in complex components of electroplating wastewater. Disposal and direct discharge into the environment will cause great harm to land and water pollution. These heavy metals discharged into the environment can only be changed in form or transferred, diluted, and accumulated, and cannot be degraded, and eventually accumulate in animals and plants th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
CPCC02F1/001C02F1/24C02F1/286C02F1/32C02F1/38C02F1/441C02F1/442C02F1/444C02F1/705C02F1/78C02F3/34C02F9/00C02F2305/023C02F2305/10
Inventor 许欠欠
Owner 山东国辰实业集团机电设备有限公司