Financial support for this study was provided by The Thai Research Fund (TRF) and Commission
on Higher Education (CHE) under grant no. MRG4780084. We want to thank the Faculty of Science at Silpakorn University, Nakhon Pathom Province for giving wonderful opportunities. Finally, we would like to thank the Department of Environmental Science at Silpakorn University for all their great support and to let our group do a nitrogen and phosphorus removal on wastewater project.