02292nas a2200241   450000500170000000800410001703500150005810000300007324501020010326000520020530000160025749000270027350001560030050200580045652011970051465000480171170000350175970000400179470000480183471000440188281000590192685600650198520260818173929.0271098s1981    th      r     000| 0eng d  a.b105214341 aRicarte, Hilario P.,cJr.10aPretreatment alternatives for wastewater from oil tank farm and related oil product manufacturing  aBangkok :bAsian Institute of Technology,c1981  a121 :bill.1 aThesis ;vno. EV-81-16  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1981  aShell CNS 'oil installation was utilized as a case study for its oily  waste problem. Investigations were carried out on the existing treatment  system believed to be ineffective. Sources and characteristics of waste~  water from oil tank farm and related oil product manufacturing were evalu-  ated. Treatability studies of discharges with very high oil concentrations  (mainly free oil and tempOrary emulsions) ranging from 70 to 2,240 mg/l  were conducted using two types of 6il separators, namely, oil interceptor  and compact plate separator (CPS).  Performance of the oil interceptor~ a very simple form of gravity  separator ·for oil-water mixtures,revealed a removal efficiency as high as  90% with effluent concentration of less than 15 mg/l oil and grease for a  properly designed and maintained unit.  Pilot-plant o~eration of the compact plate separator at the optimum  flow rate of 2.5 m /h demonstrated an oil removal efficiency of more than  90% even without external heating. -However, better effluents were observed  when it was coupled with an oil interceptor.serving as auxiliary unit.  Both treatment systems are inexpensive from the point of view of a  wealthy industry. 0aSewagexPurificationxRotating disc process0 aSamorn Muttamara,eChairperson1 aNguyen, Cong Thanh,eCo-Chairperson1 aWatanabe, Yoshimasa,eExamination Committee2 aGovernment of Japan,eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-81-16  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B21613