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Sains Malaysiana 44(12)(2015): 1715–1720 Streamlined Life Cycle CO2 Emission Assessment of Sewage Treatment in Taiwan (Penyelarasan Kitaran Hidup Penilaian Pembebasan
CO2 Perawatan Kumbahan di Taiwan)
YU-SHENG
CHANG*
Department of Environmental Information and Engineering,
Chung Cheng Institute of Technology National Defense University
No.75 Shiyuan Rd., Daxi Township, Taoyuan County 33551, Taiwan Received: 1 September 2014/Accepted: 23 June 2015 ABSTRACT Sewage treatment is an important issue in a country for public health
and environmental protection. The treatment process not only consumes
energy but also emits CO2. In this research, the idea of streamlined
life cycle assessment was applied. The CO2 emission
from sewage treatment was assessed from direct energy consumption
of four major sewage treatment plants in Taiwan. The results showed
that the CO2
emission at in-plant sewage treatment stage takes
more than 95% of total CO2
emission for most plants. The results suggested that
CO2 emission
of sewage treatment can be calculated from energy consumption at
in-plant sewage treatment stage to simplify the calculation. The
CO2 emission
of sewage treatment was then assessed from sewage plants in Taiwan
using in-plant electricity consumption. The unit CO2 emission
of sewage treatment in Taiwan is 0.216 kg-CO2/m3.
This database will be an important reference for water resource
research and future government environmental policies. Keywords: CO2 emission; life cycle assessment (LCA);
sewage treatment
ABSTRAK Rawatan kumbahan merupakan isu yang penting dalam negara untuk kesihatan
umum dan perlindungan alam sekitar. Proses rawatan ini tidak hanya
menggunakan tenaga tetapi juga membebaskan CO2. Dalam
kajian ini, idea kitaran hidup yang diselaraskan telah diaplikasikan.
Pembebasan CO2 daripada rawatan kumbahan telah dinilai daripada penggunaan
tenaga langsung daripada empat pusat rawatan kumbahan yang utama
di Taiwan. Keputusan menunjukkan bahawa pembebasan CO2 di
peringkat dalam pusat rawatan kumbahan merangkumi 95% daripada jumlah
pembebasan CO2 di kebanyakan pusat. Keputusan mencadangkan bahawa pembebasan
CO2 daripada rawatan kumbahan dapat dikira daripada penggunaan
tenaga di peringkat dalam rawatan kumbahan untuk memudahkan pengiraan.
Pembebasan CO2 daripada rawatan kumbahan kemudiannya
dinilai daripada pusat kumbahan melalui penggunaan elektrik dalam
pusat. Unit pembebasan CO2 daripada rawatan kumbahan di
Taiwan adalah 0.216 kg-CO2/m3. Pangkalan
data ini akan menjadi rujukan penting untuk kajian sumber air dan
polisi alam sekitar kerajaan pada masa hadapan. Kata kunci: Kitaran hidup
yang dilaraskan; pembebasan CO2; rawatan kumbahan
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