... 1974 tons of BOD, 766 tons of TSS, 8.4 tons of phosphorus and 52.5 tons of nitrogen annually; Trang An JSC can release 64.8 tons of BOD, 48.6 tons of TSS, 0.6 ton of phosphorus, 1.6 tons of nitrogen ... 766 tons of TSS, 8.4 tons of phosphorus and 52.5 tons of nitrogen; Trang An JSC - 64.8 tons of BOD, 48.6 tons of TSS, 0.6 tons of total phosphorus, 1.6 tons of nitrogen and 25 tons of oil and ... Journal of Science, Earth Sciences 26 (2010) 174-178 174 A study of waste water impacts of main factories on water quality of To Lich river, Ha Noi Tran Van Quy*, Tran Van Son Faculty of Environmental...