Treatment method for coking wastewater
A technology for coking wastewater and water quality, which is applied in the field of water treatment and can solve the problems of inability to discharge directly, high effluent COD, and easy fouling and blocking of membrane modules.
Active Publication Date: 2017-02-22
BAOWU CHARCOAL MATERIAL TECH CO LTD
View PDF2 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, when it is applied to the field of coking wastewater treatment, there are still problems such as high effluent COD, which cannot be discharged directly; membrane modules are prone to fouling and blockage, which increases operating costs
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] Aiming at the composition characteristics and treatment difficulties of coking wastewater, the present invention creatively adds complex biological enzymes related to refractory components of coking wastewater into the AO+MBR system that replaces the traditional biochemical sedimentation tank with membrane separation technology, increasing the efficiency of biochemical reactions, Strengthen the microbial action and impact resistance, so that the COD and total cyanide indicators of the effluent will continue to decrease; when the biological enzyme system is established, the micellar bacteria will take the lead, the soluble oil will be effectively degraded, the viscosity of the activated sludge will be reduced, and the membrane fouling will be reduced The possibility of plugging, while retaining the advantages of low sludge production, low operating costs, good effluent quality, and small footprint of the membrane separation technology system, and also using the membrane's ...
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
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a treatment method for coking wastewater. The method comprises the steps of: making coking wastewater enter an anoxic tank for denitrification reaction, performing stirring to homogenize mixed water quality and prevent activated sludge from depositing, adjusting the pH of coking wastewater to 7.5-8.5, and adding composite common bio-enzyme into the anoxic tank; letting the anoxic tank effluent water enter an aerobic tank for nitration reaction, and adding composite common bio-enzyme and special enzyme into the aerobic tank; conveying aerobic tank effluent water by sludge reflux pump in 2 paths, wherein one path returns to the anoxic section for further removal of T-N, and the other path is led into a membrane separation tank; subjecting the mixed liquid to solid-liquid separation by a water production pump in a suction filtering way, intercepting activated sludge in a biochemical system, and subjecting the filtered effluent water to follow-up process to reach up-to-standard discharge. The method provided by the invention can degrade the effluent water COD to less than 70mg / l, T-CN to less than 0.5mg / l and turbidity to less than 1NTU, and through subsequent simple physicochemical treatment, the effluent water can achieve the direct emission standard of ''Emission standard of pollutants for coking chemical industry'' (GB16171-2012).
Description
technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a novel and efficient method for treating coking wastewater. Background technique [0002] Coking wastewater is the wastewater formed during high-temperature and medium-temperature dry distillation of coal, gas purification and chemical product refining, which contains organic pollutants such as phenols, benzene series, polycyclic aromatic hydrocarbons, and nitrogen-containing heterocyclic compounds, as well as ammonia, cyanide, sulfur, etc. Inorganic pollutants such as cyanide have complex components, a wide variety of components, high concentration of organic pollutants and high chroma of sewage, high toxicity, and very stable properties. It is a typical refractory complex toxic industrial organic wastewater. It is difficult and costly to meet the discharge standards. If the treatment is not done properly, it will cause great harm to the national water envir...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 陶军王君婷刘畅沈振华周超裘慕贤
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD