城镇居民人均日生活污水污染物产生量测算之产污规律

选择常州市某居民楼宇开展居民生活污水污染物的源头产生量及规律研究。检测日的居民生活污水人均日排放量为216 L/(人·d),在06:30—10:30和19:00—21:30两个时段分别出现较高值,最大时排放量和日均时排放量的比值为1. 92;楼宇排水口COD、BOD₅、NH₃-N、TN和TP日均浓度分别为549、259、45. 43、79. 23和7. 45 mg/L,也出现了两个较高值,其中第一个高峰时段提前至凌晨,最大浓度与日均浓度的比值分别为1. 63、1. 56、2. 15、2. 01和2. 03;人均日污染物产生量分别为121、59、9. 5、17. 0和1. 6 g/(人·d),同样在06:30—10:30和19:00—21:30出现两个高峰时段,但污染物产生量的时变化更加显著,最大值和最小值的比值分别达到15. 68、19. 68、9. 22、14. 16和14. 20; BOD₅/COD、BOD₅/NH₃-N、BOD₅/TN和BOD

Emission Regularity of Daily Domestic Sewage Pollutant Production of Urban Residents Per Capita

A residential building in Changzhou was selected for the research of quantity of raw domestic sewage pollutant production and time changes,and the data of 24 hours was analyzed.The daily production of domestic sewage per capita was 216 L/(p·d),with the higher value periods of 06:30 to 10:30 and 19:00 to 21:30,and the ratio of maximum hourly to daily average hourly was 1.92.The daily average COD,BOD5,NH3-N,TN and TP concentrations of raw domestic sewage discharged from the building were 549,259,45.43,79.23 and 7.45 mg/L respectively,also with two higher value periods,but the first higher period appeared earlier,and the ratios of the maximum concentration to the average daily concentration were 1.63,1.56,2.15,2.01 and 2.03,respectively.Accordingly,the daily domestic sewage pollutants production per capita were 121,59,9.5,17.0 and 1.6 g/(p·d),respectively,with also two higher value period of 06:30 to 10:30 and 19:00 to 21:30;but hourly variation of pollutants production was more obvious,with ratios of maximum to minimum value of 15.68,19.68,9.22,14.16 and 14.20,respectively.Daily average concentration ratios of BOD5/COD,BOD5/NH3-N,BOD5/TN and BOD5/TP were 0.47,5.71,3.27 and 34.82,the fluctuation of BOD5/COD was not obvious with maximum to minimum ratio of only 1.63,but fluctuation of BOD5/NH3-N,BOD5/TN and BOD5/TP was obvious,with higher value period of 08:30 to 20:30.