The assessment of domestic waste-water quality for the guideline of water treatment and remediation in urban area

Abstract

The purposes of this research aim to survey the water quality and to construct effective domestic wastewater treatment system of Wat-pracharabuetam and Saphan-kesakomol community, Dusit district in Bangkok. The
observation of water quality in daily load of representative 24 hr composite samples for 5 months (January 2015- May 2015) is described. The dissolved oxygen (DO), biochemical oxygen demand (BOD), Total nitrogen, Total
phosphorus, Total solids (TSS), Suspended solids (SS) and pH have been analyzed. However, the effluent of wastewater such as DO and BOD exceeded the average of effluent standard at 1-1.5 and 84-87 mg/l, respectively.
The results showed that the sources have caused water pollution in those areas including domestic market, household sewage and industrial factory with an average of 161,600 l/day, 1,616 m3/day or 6.73 m3/h (BOD loading
average of 0.58 kg/h). The questionnaire concerning knowledge participation of wastewater management was conducted through the samples, drawn from population sampling technique. The samples were ranged in the pretraining (n = 500 people) and the post-training (n = 200 people). The results revealed that their knowledge participation was at a good level (35%, 83.15%), a moderate level (23%, 16.85%), and a needs improvement level (42%, none), respectively. Furthermore, we suggest an Aerobic-anaerobic facultative pond model, which is an appropriate method in the selected urban area because pH and BOD values can be monitored on this system. However, this system requires cooperation from Dusit district office and Department of drainage and sewerage in planning to eliminate obstructions and to control the opening of floodgates. The water resource has been developed and improved in the appropriate criteria of effluent-quality standard in this study.