The Performance Study of a Wastewater Treatment Plant through Equipment Upgrading

• Main Authors: CHEN ZAI XING, 陳在興
• Other Authors: CHEN SHI YU
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/wg73nf

碩士 === 輔英科技大學 === 環境工程與科學系碩士班 === 107 === The purpose of this study is to understand the characteristics of wastewater from hotel and to evaluate the performance of wastewater treatment plant before and after hardware upgrading, and to explore and verify the removal efficiencies of various water pollutants. The treatment processes in this study included floatation, pretreatment, primary treatment, secondary treatment, and tertiary treatment. After the upgradation, the water quality of effluent meets the water quality standard value of hotel industry (COD: 150 mg/L, BOD: 50 mg/L, SS: 50 mg/L). The reasons for hardware upgradation are: (1) the COD removal ratio reduced, (2) there is no nitrogen and phosphorus removing function, (3) SS in effluent did not meet the standard, (4) the effluent is able to be recylced. After upgradation, there are some units installed: (1) oil-water separation system, (2)sedimentation unit of primary sedimentation tank and biological sedimentation tank, (3) nitrogen, phosphorus and COD removal system, (4) UV equipment. The water quality of influent and effluent was compared each other before and after treatment system upgradation. The average removal efficiency of COD and SS was 57.87% and 91.06% before upgradation, respectively. And it was achieved to 86.33% and 97.15% after upgradation, respectively. The treatment performance obviously increased. The reason is presumed to be as bellow:(1) new vegetable residue interceptor was installed, (2) original iv contact oxidation pool was modified into an anoxic tank to remove nitrogen and total phosphorus in wastewater, (3) The filter medium in the contact oxidation tank was updated and upgraded, (4) inclined tubes were mounted in sedimentation tank, (5) UV-Fenton equipment was set up to assist COD degradation.