Investigation of Specific Water Pollution Indicators for Domestic Sewage and Waste Water

• Main Authors: LIN, YI-CHIAN, 林宜謙
• Other Authors: CHIN-CHENG CHOU
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/13821290698430916964

碩士 === 國立臺灣大學 === 獸醫學系研究所 === 85 === The aims of this study were first to differentiate the specific indicators of swine waste water from domestic sewage, and then to evaluate the possibili ty of utilizing these indicators as tools to estimate river pollution by swine waste. Thirty-four sewage samples（8 original domestic sewage(A1), 9 inflow w aste water(A2), 9 outflow waste water(A3), and 8 downstream river water(A4)）, were collected from Taipei Di-huah waste water treatment plant and its downst ream. Swine waste samples were collected separately from Pig Research Institut e of Taiwan（PRIT）and Tai-chung swine farms. They were 11 solid liquid separa tion samples(B1), 11 post-anaerobic fermentation samples(B2), 6 inter-aerobic treatment samples(B3), 11 overflow of final clarifier samples(B4), and 8 downs tream samples(B5) from PRIT, and twenty-four samples from Tai-chung as compari son purpose. Conventional water pollution indicators－BD5, COD, SS, and pH, an d specific bacterial indicators－FC, FS, FC/FS, and flora of Enterococcus were investigated. BOD5, COD and SS had no source specificity and influenced by di lution factor and treatment ability easily. Thus, they cannot be used as sourc e identification purposes. The results of FC/FS for A3 and A4 were 52.58＋/－3 9.52 and 38.61＋/－44.49 respectively. All were significantly higher than FC/F S of B4（0.81＋/－0.66）, and of B5（1.71＋/－2.42）（P＝0.0002）. X ratio, de fined as（Enterococcus durans/E. hirae）／（Enterococcus faecalis/E. faecium） , of A3 and A4 was 0.90, and were lower than X ratio of B4 and B5（5.55）. Sim ilar FC/FS and X ratio were also noticed from other swine water samples. This indicated FC/FS and X ratio were suitable of distinguishing swine and domestic source of waste water. On the assessment of the Kao-Ping river, the pollution declined after the FMD outbreak, and the FC/FS and X ratio indicated that ups tream is in heavy polluted by swine waste water. However, the method is still in early stage to be used as a tool to predict the weigh of contribution from different sources. A mathematical model involved variables, such as different animal sources, pollutant amount, water temperature, and water volume, etc., w as needed for future research to estimate the proportion of different pollutio n sources.