Study on susceptibility of domestic sewage to biodegradation under laboratory conditions

摘要

Three lab.tests were used for studying a sewage susceptibility to aerobic biodegradn.The O2 intake rate was detd.by measuring the O cone,in the sewage each 30 s for 7 min.The fractionation of org.matter was carried out by filtration (0.45 mu m filter) to separate suspension and detn.of BOD and COD in the filtrate and filter cake.The respirome-tric test was carried out for 28 days to det.the O2 amount consumed for oxidn.of org.matter in the sewage.The detn.of COD in sewage fractions was fund the most perspective method for assessment of sewage quality in respect to designing the systems for biolog.treatment of sewage.