Design of Experiment Equipment for Treating Low Temperature Domestic Sewage Using Biological Contact Oxidation Process

2011 ◽  
Vol 71-78 ◽  
pp. 4765-4769
Author(s):  
Ying Li ◽  
Jing Zhou
Keyword(s):  
Low Temperature ◽  
High Latitude ◽  
Oxidation Process ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Oxidation Method ◽  
Treatment Processes ◽  
Contact Oxidation ◽  
Biological Contact Oxidation

According to the biodegradability of wastewater and better adaptability of biological treatment processes, and advantages of using biological contact oxidation process to treat sewage, biological contact oxidation method was used to study the removal conditions of domestic sewage treatment in high latitude area, and a set of experimental device of biological contact oxidation method applied in treating domestic sewage in low temperature was designed, to solve the serious pollution of domestic wastewater and its higher treatment cost in high latitude area.

Application of Biological Contact Oxidation Process of Sewage Treatment in a Hospital Study

2015 ◽  
Vol 727-728 ◽  
pp. 123-125
Author(s):  
Lei Sun
Keyword(s):  
Oxidation Process ◽  
Sewage Treatment ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Complex Chemical Composition ◽  
Contact Oxidation ◽  
Hospital Sewage ◽  
Biological Contact Oxidation ◽  
Hospital Study ◽  
Water Waste

Hospital sewage effluentwater quality similar to that of its integrated waste water, waste watercontent than the more complex chemical composition, the use of this treatmentis a biofilm of bio-contact oxidation process for the management of hospitalWaste water to run effective and save operating costs, facilitatethe management of operations, and achieved satisfactory economic benefits,social benefits and environmental benefits.

Anaerobic and Aerobic Submerged Bio-Filter System for Small Scale On-Site Domestic Sewage Treatment

1993 ◽  
Vol 27 (1) ◽  
pp. 51-57 ◽  
Author(s):  
T. Watanabe ◽  
K. Kuniyasu ◽  
H. Ohmori
Keyword(s):  
Water Pollution ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Small Scale ◽  
Sewerage System ◽  
Black Water ◽  
Treatment Processes ◽  
Gray Water ◽  
Domestic Wastewater Treatment

In order to prevent water pollution and satisfy the demands for flush toilets in regions where a public sewerage system has not been in service, some on-site small scale domestic wastewater treatment processes called GAPPEI JOHKASOU have been developed to treat black water and gray water together in an individual house. Prior to its technical development, the characteristics of wastewater discharged from individual houses should be measured. The possibility of application of anaerobic filter is examined for processing organic wastewater at low concentration like in domestic wastewater, and an anaerobic filteris successfully developed to lengthen the sludge removal interval, since the flow rate of wastewater from individual houses is characterized by a large variation. It is difficult to serve the centralized treatment systems in many regions. Thus, a small GAPPEI JOHKASOU has been developed and propagated for by individual houses in such regions.

Behaviour of pathogenic E. coli and Salmonella enteritidis in small domestic sewage treatment apparatus (“Johkasou”)

2001 ◽  
Vol 43 (12) ◽  
pp. 191-193 ◽  
Author(s):  
M. Kaneko ◽  
T. Nambu ◽  
M. Tokoro
Keyword(s):  
Water Temperature ◽  
Salmonella Enteritidis ◽  
Sewage Treatment ◽  
Reduction Rate ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
E Coli ◽  
Log Reduction ◽  
Sewage System ◽  
Pass Through

“Johkasou” is a small sewage treatment apparatus commonly used in Japan which can effectively treat domestic wastewater in places where a public sewage system is difficult to supply. The behaviour of enterohaemorrhagic E. coli 0157 and Salmonella enteritidis in a “Johkasou” was studied. Their reduction rates depended significantly on the water temperature in the “Johkasou” with minimal decrease in numbers at 10°C within 48 h. The reduction rates increased at 20°C and 30°C where 4 log reduction could be expected. The reduction rates were influenced by the BOD of the solutions that contained the pathogens with the lower the BOD the higher the reduction rate. The reduction rates were about the same between both pathogens. The result showed that it was necessary to disinfect the effluent as some pathogens can pass through the apparatus when some users of the apparatus excrete pathogens.

Influence of Alkalinity on Partial Nitrification Treating Domestic Sewage and the Microbial Community in MBR

2013 ◽  
Vol 807-809 ◽  
pp. 1564-1569
Author(s):  
Xiao Jing Zhang ◽  
Dong Li ◽  
Yu Long Zhang ◽  
Yong Ping He ◽  
Jie Zhang
Keyword(s):  
Microbial Community ◽  
Low Temperature ◽  
Membrane Bioreactor ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Partial Nitrification ◽  
Ammonia Conversion

Partial nitrification (PN) was rapidly started-up in a sequencing batch membrane bioreactor (MBR) treating domestic wastewater with low temperature (11~15°C), the influence of alkalinity on PN process and the feasibility to control the ratio of nitrite to ammonia in effluent were investigated through changing the ratio of Alkalinity/ammonia in influent. Results showed that effluent ratio can be controlled flexibly with the liner relationship between ammonia conversion and the ratio of alkalinity to ammonia when alkalinity is insufficient, whereas, that could be effectively achieved by the indicator role of alkalinity on nitrite. Phylogenetic results indicated the predominance ofNitrosomonasand the absence of theNitrosospirain the condition of insufficient alkalinity, which was consistent with the SEM results. FISH results suggested that lack of alkalinity presented little impact on the relative quantity of AOB.

Treatment of linear alkylbenzene sulfonate (LAS) wastewater by internal electrolysis – biological contact oxidation process

2011 ◽  
Vol 64 (1) ◽  
pp. 147-154 ◽  
Author(s):  
X. Z. Cao ◽  
Y. M. Li
Keyword(s):  
Linear Alkylbenzene Sulfonate ◽  
Oxidation Process ◽  
Treatment Method ◽  
Combined Processes ◽  
Optimal Conditions ◽  
Linear Alkylbenzene ◽  
Internal Electrolysis ◽  
Alkylbenzene Sulfonate ◽  
Contact Oxidation ◽  
Biological Contact Oxidation

Surfactant wastewater is usually difficult to treat due to its toxicity and poor biodegradability. A separate physico-chemical or biochemical treatment method achieves a satisfactory effect with difficulty. In this study, treatment of the wastewater collected from a daily chemical plant by the combination processes of Fe/C internal electrolysis and biological contact oxidation was investigated. For the internal electrolysis process, the optimal conditions were: pH = 4–5, Fe/C = (10–15):1, air–water ratio = (10–20):1 and hydraulic retention time (HRT) = 2 h. For the biological contact oxidation process, the optimal conditions were: HRT = 12 h, DO = 4.0–5.0 mg/L. Treated by the above combined processes, the effluent could meet the I-grade criteria specified in Integrated Wastewater Discharge Standard of China (GB 8978-1996). The results provide valuable information for full-scale linear alkylbenzene sulfonate wastewater treatment.

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