DOMESTIC WASTEWATER POLLUTION ASSESSMENT IN TERMS OF ORGANIC LOADING IN PATHUM THANI PROVINCE

Abstract

The study aims to assess the organic matter loading of domestic wastewater that was released into natural water in Pathum Thani Province in 2020 and forecast to 2040. The organic matter loading is estimated in term of Biochemical Oxygen Demand (BOD) in three different scenarios based on the BOD values:  untreated wastewater, treated wastewater that doesn’t meet the effluent quality standards, and treated wastewater in accordance with the effluent quality standards. A forecast of the organic matter loading in the next 20 years is projected based on the forecast population. The results found that in the year 2020, the organic matter loading values are 52,085.35, 24,584.28 and 4,166.83 kg/day for the three scenarios above, respectively. These values will increase by about 15.64 % to the values of 61,738.64, 29,140.64 and 4,939.09 kg/day in the year 2040. The wastewater treatment system in strict compliance to the effluent quality standards can help to reduce the organic matter loading effectively. The information obtained from this assessment could be useful in planning the wastewater treatment plant capacities, guidelines, and measures to reduce water pollution of Pathum Thani Province.