TY  - BOOK
AU  - Chiraphorn Kornsitthikul
AU  - Samorn Muttamara,
AU  - Takizawa,Satoshi
AU  - Dahl-Madsen,Karl Iver
ED  - Government of the United Kingdom,
TI  - Alternative treatment of petrol station wastewater
T2  - Thesis
PY  - 1998///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Sewage
KW  - Purification
KW  - Ozonization
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master  of Science, School of Environment, Resources and Development; Thesis (M.Sc.) - Asian Institute of Technology, 1998
N2  - Three treatment systems, namely ozonation, activated sludge and combination of  preozonation and activated sludge were investigated for the removal of COD, BOD, Oil &  Grease and TSS from petrol station wastewater. All experiments were run in batch mode.  The application of ozone in petrol station wastewater was effective to oil removal.  Three ozone dosages of 4. 63, 10.30 and 14.08 mg 0 3/L 0 2 were used in this study. The  optimum conditions were accomplished at ozone dosage of 14.08 mg 0 3/L 0 2, contact time  of 60 minutes and at neutral pH. The removal efficiencies of COD, BOD, TSS and Oil &  Grease were be 60.713, 69.103, 53.443 and 65.593 respectively. The pH of wastewater  showed great influence on the efficiency of ozonation. Ozonation can promote  biodegradability and also destabilize the suspension of wastewater. However, in some cases,  ozonation gave negative effect on biodegradability.  Biological treatability of this wastewater was also carried out in this study. The  activated sludge systems were operated with two organic loading levels (F/M ratio) of 0.25  and 0.38. The removal efficiencies of COD and Oil & Grease with F/M ratio of 0.25 were  found to be higher than those of 0.38, but detention time of the former was twice higher than  that of the later.  Further investigations on effect of preozonation at different pH on perfo rmance of  the sequential activated sludge treatment system were also made. The results indicated that  the pH conditions of the preozonation step played a significant role in the subsequent  biological treatment processes. BOD removal efficiency of preozonation at low pH was  higher than that of individual treatment.
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B12748
ER  -