| Summary: | 碩士 === 國立臺北大學 === 自然資源與環境管理研究所在職專班 === 105 === This study integrates calculating methods of GHG emissions according to domestic and foreign WWTPs, formulating a comprehensive assessment for GHG emissions from WWTPs in Taiwan. Take Dihua WWTP as an example, quantifying GHG emissions from each unit facility and putting forward countermeasures and suggestions to reduce GFG in accordance with the key factors.
For the method of assessing GHG emissions in Dihua WWTP, the process of treating sewage and studying domestic and foreign related references, defining the sources of GHG emissions and dividing into direct and indirect parts according to the type of emissions to estimate the WWTP GHG emissions. The direct emissions are from the origin defined. The GHG coefficient is based on the actual value from the references. The indirect emissions are assessed only from the consumption of electricity designed and consumption of chemicals. The GHG coefficient is based on domestic and foreign information announced.
The result is that the direct GHG emissions are 15,889,300 kg CO2 / day in Dihua WWTP. And its main source is from the first aerobic tank within T01-4 activated sludge aeration tank. Then the indirect emissions from the consumption of electricity and consumption of chemicals are 112,200 and 12,773 kg CO2 / day. Based on this study, the total GHG emissions are 16,014,273 kg CO2 / day. However, with the IPCC and ITRI models of assessing, the total GHG emissions are as follows: this study(16,014,273 kg CO2/day)＞IPCC(1,253,740 kg CO2/day)＞ITRI(611,670 kg CO2/day). The reason of the difference is that the IPCC and ITRI models of assessing are suitable for overall assessment, not for single assessment. Therefore, it is necessary to study suitable methods of assessing GHG emissions of WWTPs in Taiwan.
Measures to adapt GHG can be dominated by direct sources of larger emissions and be supplemented by indirect sources of smaller emissions. If Dihua WWTP wants to reduce the direct emissions of GHG, it is recommended to monitor the quality of sewage and to adopt the split system of concentration. The reduction measures of indirect emissions can be set by the energy-saving mode and operation, the energy-saving pump with high efficiency, intelligence control, frequency control and aeration efficiency.
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