Abstract:
Wastewater, generated from the Silpakorn University, Sanamchandra Palace Campus, includes soil, kitches, gray as well as laboratory and painting wastewater. This campus is divided into 2 parts, western and eastern parts of Sa Kaew pond. Wastewater flow rate and organic loading from the west part were 1,469.29 m3/day and 243.90 kg_BOD/day respectively whereas those form the eastern part were 187.14 m3/day and 31.07 kg_BOD/day respectively. Percentage of organic loading of the west and east pasts were 87.26 and 12.74% of total organic loading. The result showed that wastewater from the western part was pre-treated by septic tank or grease trap before pumped to the central wastewater treatment system. Finally, effluent was drained to canals in the campus. For eastern part, there was no central wastewater treatment system. Wastewater from certain buildings was treated by their onsite wastewater treatment systems but some was drained to the canals without any treatment. There are ten onsite wastewater treatment systems in this campus. However, these systems were not properly maintained. Six systems were out-of-order whereas only four systems were operated, which were systems at Science building 1, Silpa Bhirasri building 2 (Faculty of Decorative Arts), Soamsawali building (main building) and Somsawali building (canteen section) (Faculty of Education). As Compared to the effluent standards for the communities (2010), The value of BOD, TKN, TP and SS of effluents at all four onsite systems exceeded the standards, In order to reduce water pollution problem in this campus, all ten onsite wastewater treatment systems should be regularly maintenance in order to achieve their efficiencies.