Environmental health situation and potential factors influencing wastewater effluent qualities of gasoline stations in Bangkok areas

สถานการณ์ด้านอนามัยสิ่งแวดล้อมและปัจจัยที่มีผลต่อคุณภาพน้ำทิ้งจากสถานีบริการน้ำมันเชื้อเพลิงในเขตกรุงเทพมหานคร

Name: Doungkamon Phihusut

LCSH: Gasoline -- Environmental aspects

LCSH: Water Pollution

LCSH: Water quality management -- Bangkok

Abstract: The objectives of this cross-sectional research were to specify the situation and potential factors including activities, sizes, environmental health operation level and wastewater treatment operation level which influenced gasoline station effluent wastewater qualities, focusing on pH, Chemical Oxygen Demand (COD), Suspended Solids (SS) and Fat, Oil, and Grease (FOG). 29 gasoline stations were randomized from 3 zones of BMR: inner city, urban fringe, and suburb. The data were collected by interview, inspection survey, and environmental sampling. The environmental health operations were considered in relation to 8 issues: general sanitation, solid waste management, toilet sanitation and sewage management, wastewater treatment operation, pest and rodent control, water consumption and drinking water, safety condition, and employees’ hygiene. They were scored and finalized as environmental health operation levels. The correlation between wastewater qualities, environmental health and wastewater treatment operation levels were determined by Kruskal Wallis and Mann-Whitney test. The results showed that gasoline stations usually provide a refueling service, office and toilet while other special activities found were lubricant changing service, carwash service, convenience shop, engine repair service, tire and battery changing service, and food corner. Size classification of gasoline station was done according to the provided activities and services: most of them were classified as medium size. They mostly had environmental health and wastewater treatment operation at a good level, as compiled from guidelines. The wastewater quality of every sample was unacceptable when compared with standard values, especially the FOG value. The medians of pH were 7.47, COD 252.00 mg/L, SS 106.00 mg/L and FOG 1046.25 mg/L. The statistical analysis demonstrated that convenience shop and size of gasoline station had relation to COD values. The COD values were worse in gasoline stations which provided a convenience shop and were classified as large gasoline stations. The environmental health and wastewater treatment operation levels had no significant differences with the effluent wastewater qualities. The findings showed that the recommended criteria of environmental health and wastewater treatment operations could reflect a rough picture of the environmental health situation in gasoline stations and are insufficient to control the quality of effluent wastewater from gasoline stations. Additional procedures for wastewater contaminant reduction, efficient waste management, installing effective fat, oil and grease treatment system and consistent monitoring wastewater quality are necessary for application. The Polluters Pay Principle policy should be practically used to increase awareness of gasoline station companies and owners.

Mahidol University. Mahidol University Library and Knowledge Center

Address: NAKHONPATHOM

Email: liwww@mahidol.ac.th

Name: Siranee Sreesai

Role: Thesis Advisors

Created: 2009

Modified: 2553-07-15

Issued: 2010-07-15

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: TH D738e 2009

eng

Spatial: Bangkok

DegreeName: Master of Science

Level: Master's Degree

Descipline: Environmental Sanitation

Grantor: Mahidol University

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