오수정화시설 및 정화조 방류수의 수질오염도에 관한연구

Studìes on the Contamìnation Degree of Effiuent from the Sewage Purification System and Septic Tank

This study was performed to investigate the contamination degree of effluent from the sewage purification system and septic tank. The 711 samples. were collected from the large size tank located in Seoul from Mar. to ]une 1991. The results were as follows ; 1. The pH va1ues of effluent were largely neutra1 of 6.96 in sewage and 7.43 in septic ta‘- 2. The average concentration of BOD was 48. 18 mgjl in sewage and 127.0mgjl in septic tank. 3. The average concentration of SS was 40.8mgjl in sewage and 90. 5 mgjl in septic ta. 4. 1n the analysis of nutrient salts. the average concentration of NH3-N was 31.62mgjl in sewage and 88. 79 mgjl in septic tank. 5. 1n the analysis of correlation among items. BOD. SS. NH3-N and P04-P were higly correlated beween items. 6. As a results of above analysis. it is considered as desirable evaluation method of effluent not through the only item but through the integrated items.