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An Analysis of the Use of Biosludge as an Energy Source and Its Environmental Benefits in Taiwan
Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
Received: 2 July 2012; in revised form: 25 July 2012 / Accepted: 2 August 2012 / Published: 14 August 2012
Abstract: The objective of this paper was to provide a preliminary analysis of energy utilization from biological wastewater treatment sludge (biosludge) in Taiwan, a densely populated country (estimate 640 persons/km2) with a high dependence (over 99%) on imported energy. The discussion focused on the status of biosludge generation and its management in the years 2004–2010. Findings showed that the main types of combustible waste (i.e., biosludge) produced by the industrial and agricultural sectors of Taiwan included food processing sludge, wine brewery sludge and agricultural sludge which may be reused as auxiliary fuel in the utilities (e.g., generator, boiler and incinerator). Furthermore, two conceptual biosludge-to-energy systems have been addressed with regard to the thermochemical conversion processes. One is to adopt direct combustion for power generation in the combined heat and power system. Another system uses pyrolysis and gasification for producing biochar (solid fuel), bio-oil (liquid fuel) and syngas (gas fuel). Based on their thermochemical properties and reported generation quantities, the energy potential and the environmental benefits of mitigating CO2 emissions were also analyzed in the study, showing around 1.1 × 103 TJ/year and 57 Gg CO2/year, respectively.
Keywords: biological wastewater treatment; sludge; waste-to-energy; regulatory promotion; benefit analysis
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Tsai, W.-T. An Analysis of the Use of Biosludge as an Energy Source and Its Environmental Benefits in Taiwan. Energies 2012, 5, 3064-3073.
Tsai W-T. An Analysis of the Use of Biosludge as an Energy Source and Its Environmental Benefits in Taiwan. Energies. 2012; 5(8):3064-3073.
Tsai, Wen-Tien. 2012. "An Analysis of the Use of Biosludge as an Energy Source and Its Environmental Benefits in Taiwan." Energies 5, no. 8: 3064-3073.