Evolution of biochemical processes in coking wastewater treatment: A combined evaluation of material and energy efficiencies and secondary pollution

2021 ◽  
pp. 151072
Author(s):  
Zhi Qin ◽  
Cong Wei ◽  
Tuo Wei ◽  
Zemin Li ◽  
Zijun Pang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Coking Wastewater ◽  
Biochemical Processes ◽  
Secondary Pollution ◽  
Combined Evaluation

Research Advances on Medical Wastewater Disinfection Technologies

2012 ◽  
Vol 550-553 ◽  
pp. 2210-2214
Author(s):  
Xue Hong Yang ◽  
Bo Yu ◽  
Chun Wu
Keyword(s):  
Wastewater Treatment ◽  
New Technologies ◽  
Environmental Safety ◽  
Pathogenic Microorganisms ◽  
Electrochemical Disinfection ◽  
Secondary Pollution ◽  
Main Technique ◽  
Wastewater Disinfection ◽  
Ultraviolet Ray

Disinfection is essential for medical wastewater treatment. Concerns about environmental safety, pathogenic microorganisms need to be killed by qualified disinfectant without secondary pollution from medical wastewater treatment. Traditional chlorination is a main technique among current disinfection technologies. However, due to the hazardous byproducts, it is likely to be replaced by new technologies such as ultraviolet ray. In addition, membrane disinfection and electrochemical disinfection are emerging techniques with prosperous market.

Coking Wastewater Physico-Chemical Treatment Technology Evolvement Review

2013 ◽  
Vol 864-867 ◽  
pp. 88-95 ◽  
Author(s):  
Zhi Jiao Liu ◽  
Yun Lng Yang
Keyword(s):  
Wastewater Treatment ◽  
Water Oxidation ◽  
Photocatalytic Oxidation ◽  
Recovery Process ◽  
Coking Wastewater ◽  
Fenton Reagent ◽  
Treatment Technology ◽  
Gas Treatment ◽  
Physico Chemical ◽  
Treatment Research

Coal coking wastewater is generated from coking, coal gas purification and coking product recovery process, its composition is complex and difficult to degrade. By introducing the coking wastewater treatment research and application, such as adsorption,coagulation and sedimentation, flue gas treatment and other physical methods, as well advanced oxidation, wet oxidation, Fenton reagent method, photocatalytic oxidation, ultrasonic oxidation, ozone oxidation method, electrochemical oxidation, supercritical water oxidation, incineration and plasma technology, this paper puts forward the trend of coking wastewater treatment technology.

scholarly journals Isolation and characterization of organic matter-degrading bacteria from coking wastewater treatment plant

2018 ◽  
Vol 78 (7) ◽  
pp. 1517-1524 ◽  
Author(s):  
Riqiang Li ◽  
Jianxing Wang ◽  
Hongjiao Li
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Removal Rate ◽  
Treatment Plant ◽  
Coking Wastewater ◽  
Naphthalene Degradation ◽  
Isolation And Characterization ◽  
Degrading Bacteria

Abstract As a step toward bioaugmentation of coking wastewater treatment 45 bacteria strains were isolated from the activated sludge of a coking wastewater treatment plant (WWTP). Three strains identified as Bacillus cereus, Pseudomonas synxantha, and Pseudomonas pseudoaligenes exhibited high dehydrogenase activity which indicates a strong ability to degrade organic matter. Subsequently all three strains showed high naphthalene degradation abilities. Naphthalene is a refractory compound often found in coking wastewater. For B. cereus and P. synxantha the maximum naphthalene removal rates were 60.4% and 79.8%, respectively, at an initial naphthalene concentration of 80 mg/L, temperature of 30 °C, pH of 7, a bacteria concentration of 15% (V/V), and shaking speed of 160 r/min. For P. pseudoaligenes, the maximum naphthalene removal rate was 77.4% under similar conditions but at 35 °C.

The occurrence and fate of phenolic compounds in a coking wastewater treatment plant

2013 ◽  
Vol 68 (2) ◽  
pp. 433-440 ◽  
Author(s):  
Wanhui Zhang ◽  
Chaohai Wei ◽  
Chunhua Feng ◽  
Yuan Ren ◽  
Yun Hu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phenolic Compounds ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Coking Wastewater ◽  
Sludge Sample ◽  
Physical Chemical ◽  
Mass Flows ◽  
Dewatered Sludge

The occurrence of 14 phenolic compounds (PCs) was assessed in the raw, treated wastewater, dewatered sludge and gas samples from a coking wastewater treatment plant (WWTP) in China. It was found that 3-cresol was the dominant compound in the raw coking wastewater with a concentration of 183 mg L−1, and that chlorophenols and nitrophenols were in the level of μg L−1. Phenol was the dominant compound in the gas samples, while 2,4,6-trichlorophenol predominated in the dewatered sludge sample. The anaerobic and aerobic tanks played key roles in the elimination of chlorophenols and phenols, respectively. Analysis of daily mass flows of PCs in WWTP showed that 89–98% of phenols and 83–89% of nitrophenols were biodegraded, and that 44–69% of chlorophenols were adsorbed to sludge, indicating that the fate of PCs was highly influenced by their biodegradability and physical–chemical property.

Preparation of a New Adsorption Material and its Application in Wastewater Treatment

2011 ◽  
Vol 356-360 ◽  
pp. 498-501
Author(s):  
Wen Jie Jin ◽  
Fan Chao Zeng ◽  
Han Xue ◽  
Ying Wang
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Biochemical Process ◽  
Effluent Water ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
New Material

A kind of new adsorption material for wastewater treatment was made of fly ash as the main composition, with addition of sodium silicate, cement and pore forming material as the accessory materials, etc. Three kinds of practical wastewater were treated by using the new material, they were printing and dyeing wastewater, papermaking wastewater and coking wastewater, respectively. The results showed that removal COD efficiencies of the three kinds of wastewater were 57.89%, 71.43%, 80%, respectively, removal color efficiencies were 90%, 92%, 92%, respectively. The new developed material was mainly used for advanced treatment of the effluent water after biochemical process. It will be a substitute for activated carbon materials and have preferable application prospect.

Evaluation of the Combined Process of Aammonia Distillation-Evaporation Concentration - Supercritical Water Gasification - Supercritical Water Oxidation for Coking Wastewater Treatment

2013 ◽  
Vol 763 ◽  
pp. 191-194 ◽  
Author(s):  
Yu Zhen Wang ◽  
Shu Zhong Wang ◽  
Yang Guo ◽  
Dong Hai Xu
Keyword(s):  
Wastewater Treatment ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Coking Wastewater ◽  
Supercritical Water Oxidation ◽  
Combined Process ◽  
Whole Process ◽  
Evaporation Concentration ◽  
Supercritical Water Gasification ◽  
Operation Cost

A combined process of ammonia distillation - evaporation concentration - supercritical water gasification (SCWG) supercritical water oxidation (SCWO) was proposed for coking wastewater treatment. The NH3 in wastewater was first recovered in ammonia distillation section. The deammoniated wastewater was concentrated in the evaporation concentration section, in which the quantity of the wastewater was decreased accordingly. Then the concentrated wastewater entered into the SCWG section to produce the syngas such as H2, CO, CH4, and liquid effluent entered into SCWO section, where the pollutants were completely degraded. The operation parameters of the combined process were simulated by Aspen Plus software and the investment and the operation cost were also analyzed. For a wastewater of 5000kg/h, the investment of the combined process is 6000000 ¥. The profit from byproduct of ammonia, syngas and steam is 70¥/t. For the whole process, it can gain a profit of 5.1 ¥/t (wastewater).

Improving the effluent of small wastewater treatment plants by bacteria reduction and nutrient removal with an algal biofilm

2003 ◽  
Vol 48 (2) ◽  
pp. 373-380 ◽  
Author(s):  
G. Schumacher ◽  
I. Sekoulov
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
High Potential ◽  
High Quality ◽  
Secondary Pollution ◽  
Algal Biofilm ◽  
Biofilm Process ◽  
Suspended Algae

In wastewater ponds, bacteria numbers decrease considerably in the case of raised algae concentrations in the effluent. This shows that algae have a high potential for bacteria reduction in wastewater. Simultaneously, algae remove nutrients from the water for the formation of biomass. However, suspended algae also cause a high secondary pollution in the effluent of wastewater treatment plants. By using attached algae, as they are frequently observed as an algal biofilm in the effluent of wastewater treatment plants, the problem of separation of algae and water can be avoided. Furthermore, the algae can be removed simply from the water. In this study the possibilities for bacteria reduction and nutrient removal were examined with the aid of an algal biofilm. The results show that an algal biofilm process can be used for cases where small amounts of wastewater should be treated and a high quality of the effluent should be attained.

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