Title

日月潭周遭污水廠處理效能對水體水質之可能影響

Translated Titles

The effect of wastewater treatment plant operation on the water quality of Sun Moon Lake area.

DOI

10.6845/NCHU.2013.00468

Authors

楊國輝

Key Words

遊客水量水質 ; 污水廠 ; 削減率 ; 監測站 ; 優養化 ; Tourist water quantity and quality ; wastewater treatment plant ; reduction rate ; monitoring station ; eutrophication.

PublicationName

中興大學環境工程學系所學位論文

Volume or Term/Year and Month of Publication

2013年

Academic Degree Category

碩士

Advisor

洪俊雄

Content Language

繁體中文

Chinese Abstract

日月潭水庫兼具水力發電、觀光旅遊及民生用水等用途,在近幾年遊憩人口快速成長,餐旅業林立下,觀光客所產生民生廢污水量與日俱增,污水中污染源如BOD、氮、磷等,若直接逕排至日月潭,將使水庫水體環境負荷加大,加速優養化的現象,進而影響水體多功能之用途。本研究依據交通部觀光局國家風景區遊客調查報告—遊客人數推估之研究調查,及根據日月潭國家風景區污水下水道收集管線系統與污水處理廠營運操作資料,分析環潭地區實際上由遊客所產生生活污水水量水質,並探討污水處理廠BOD、總氮與總磷之削減量及削減量佔日月潭水體所須削減量之比例,最後彙整行政院環境保護署監測站監測資料,分析污水廠處理效能對潭體BOD、總氮、總磷及優養化之影響。 兩污水廠之處理效能以BOD削減率為最高,總氮次之,總磷最低。其中水社污水廠99年至101年BOD削減量分別為7,658、15,576、17,536 kg/year,各年度削減率達95 %以上;總氮削減量分別為2019、2659、2883 kg/year,削減率介於80~86 %;總磷削減量分別為221、467、344 kg/year,削減率介於65~83 %。日月污水廠99年至101年BOD削減量分別為7,905、12,563、15,236 kg/year,各年度削減率達93 %以上;總氮削減量分別為1453、1222、2619 kg/year,削減率介於74~82 %;總磷削減量分別為171、271、162 kg/year,削減率介於45~84 %。 依據研究顯示日月潭水庫現況負荷量BOD為1,334,343 kg/year、總氮為520,547 kg/year、總磷為9,927 kg/year。為達貧養及甲類水體水質,目標負荷量BOD為831,965 kg/year、總氮為283,997 kg/year、總磷為5,660kg/year,則集水區每年所須削減污染量BOD為502,387 kg/year、總氮為236,550 kg/year、總磷為5,660kg/year。兩集污區(水社及日月地區)污水經污水下水道收集及污水廠處理後,99年至101年合計BOD污染削減量為15,564、28,139、32,773 kg/year、總氮為3,473、3,881、5,503 kg/year、總磷為393、738、507 kg/year,合計削減量佔日月潭水體每年須削減污染量之比例以總磷約9 % ~ 17 %為最高,BOD約3 % ~ 6 % 次之,總氮約2 %以下為最低。 就日月潭水體監測數據整體而言,位於水社及日月污水廠放流口處之監測站(監測站一及監測站三)所監測之各項污染源濃度,於兩污水廠開始營運操作後(99年至101年),所測得之總磷、氨氮、硝酸鹽氮濃度及葉綠素a皆有降低之趨勢。 日月潭水體水質從94年至101年大致呈現貧養等級,水質狀況良好。 本研究顯示位於水社及日月地區之日月潭水體優養化情形與兩區污水廠營運操作前後無明顯差別,此一現象說明日月潭水體優養化之影響因子來自其他集水區,特別是武界引水,其BOD、總氮及總磷污染量遠遠超過遊客及住戶所產生之污染量。

English Abstract

Sun Moon Lake plays a role to generate hydroelectric power, serves as a tourist resort, provides water for domestic uses and other functions. However, a rapid growth in recreational population and the hospitality industry in recent years have generated an increasing amount of general household wastewater from tourists. Among the contaminants found in wastewater are BOD, nitrogen and phosphorous, etc. If the wastewater is directly discharged into Sun Moon Lake, it will add extra burden to the reservoir water environment and accelerate the eutrophication phenomenon, thereby causing impacts to the diversified applications and purposes of the water. This study was conducted in accordance with a Tourist Population Estimation Survey on the scenic area visitor survey report done by the Tourism Bureau, and data collected from the wastewater pipeline system and the operations of wastewater treatment plants at Sun Moon Lake National Scenic Area. Follow-up processes were then performed: analyzing the actual quantity and quality of wastewater generated from livelihood by the surrounding lake areas, and reviewing the reduction amount of the BOD,total nitrogen and total phosphorous from wastewater treatment plants. In addition, the study is going to probe the ratio of reduction amount intended to reduce and the proportion it accounted for in Sun Moon Lake water. Finally, the monitoring data from the monitoring stations of Environmental Protection Administration, Executive Yuan was compiled, and the efficiency of wastewater treatment plants analyzed to find out the impacts they imposed on BOD, total nitrogen, total phosphorous and the eutrophication condition. The BOD reduction rate from two wastewater treatment plants were found to be the highest, followed by total nitrogen, and that total phosphorous being the lowest.About Suei-She wastewater treatment plant, the BOD reduction was 7,658 kg/year in 2010,2011 was 15,576 kg/year and 2012 was 17,536 kg/year,the annual total BOD reduction rate was discovered to be higher than 95%;The total nitrogen reduction was 2,019 kg/year in 2010,2011 was 2,659 kg/year、2012 was 2,883 kg/year,the annual reduction rate on total nitrogen was 80% to 86%;The total phosphorous reduction was 221 kg/year in 2010,2011 was 467 kg/year and 2012 was 344 kg/year,the reduction rate of total phosphorous was 65% to 80%. About Sun-Moon wastewater treatment plant, the BOD reduction was 7,905 kg/year in 2010,2011 was 12,563 kg/year and 2012 was 15,236 kg/year,the annual total BOD reduction rate was discovered to be higher than 93%;The total nitrogen reduction was 1453 kg/year in 2010,2011 was 1,222 kg/year and 2012 was 2619 kg/year,the annual reduction rate on total nitrogen was 74% to 82%;The total phosphorous reduction was 171 kg/year in 2010,2011 was 271 kg/year and 2012 was 162 kg/year,the reduction rate of total phosphorous wasv45% to 84%. Accroding reserches,the BOD loading of sun moon lake reservoir is 1,334,343 kg/year,the TN loading is 520,547 kg/year and the TP loading is 9,927 kg/year。To achieve oligotrophic and group A water quality that the target loading of BOD is 831,965 kg/year,the TN is 283,997 kg/year and the TP is 5,660kg/year, the BOD from the effluent collection areas must reduce about 502,387 kg/year,the TN about 236,550 kg/year and the TP about 5,660kg/year. After the wastewater from the two effluent collection areas (Suei She and Sun Moon area) were collected by the wastewater pipeline system and treated by the wastewater treatment plants, the annual total BOD reduction was 15,564,28,139 and 32,773 kg/year from 2010 to 2012,the annual TN was 3,473,3,881 and 5,503 kg/year,the annual TP was 393,738 and 507 kg/year.The proportion of annual contaminant capacity it accounted for in the entire Sun Moon Lake water, i.e. the total pollution reduction amount that it intended to reduce was recorded by total phosphorous with a highest rate of approximately 9%~17%, followed by BOD of approximately 3%~6%, and the lowest by total nitrogen of approximately 2%. Taking the Sun Moon Lake water monitoring data as a whole, the various pollution source concentrations monitored at the discharge outlets of monitoring stations (monitoring station 1 and monitoring station 3) located at Shui She and Sun Moon wastewater treatment plants were no longer getting bad after the they have started operation from 2010 to 2012. Among them, the concentrations of total phosphorous, ammonia nitrogen, nitrate nitrogen and chlorophyll a have a tendency to drop. From 2005 to 2012, the water quality of Sun Moon Lake was generally rated as oligotrophic level, in other words, good water quality condition. The research findings show that there are no significant differences on Sun Moon Lake’s eutrophication condition before and after the operation of wastewater treatment plants at Shui She and Sun Moon areas. Such phenomena explain that the impact factors of Sun Moon Lake’s eutrophication condition come from other water catchment areas, in particularly from Wu-Jie channel, where its contaminant capacity of BOD, total nitrogen and total phosphorous has far exceeded the contaminant capacity generated by tourists and households.

Topic Category 工學院 > 環境工程學系所
工程學 > 土木與建築工程
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