Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Water quality matrix for domestic wastewater Classifi Dissolved Suspended cation 0.45um BOD Oog ● 35% 65% 80% 20% 导 50% P Oooo TNKey Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology