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Monitoring of greenhouse gas emissions from farm-scale anaerobic piggery waste-water digesters

Published online by Cambridge University Press:  19 September 2018

Jung-Jeng Su*
Affiliation:
Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan, ROC Bioenergy Research Center, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan, ROC
Yen-Jung Chen
Affiliation:
Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan, ROC
*
Author for correspondence: Jung-Jeng Su, E-mail: jjsu@ntu.edu.tw

Abstract

Pig manure management systems in Taiwan differ from the model representing the Asian region developed by the Intergovernmental Panel on Climate Change (IPCC). The current study was undertaken to update greenhouse gas (GHG) emission factors of anaerobically treated piggery waste water by operating the conventional three-step piggery waste-water treatment system from selected pig farms located in northern, central and southern Taiwan. Biogas mass flow meters were installed to the outlet of anaerobic basins prior to the biogas pressure stabilizers for direct and reliable biogas measurement. The analytic results showed that average GHG emissions were 0.088, 0.128 and 0.066 m3/head/day in the northern, central and southern pig farms, respectively. Thus, the average emission levels of methane and nitrous oxide were 14.38 and 0.055 kg/head/year, respectively, from anaerobic digestion of piggery waste water for the three pig farms. The average removal efficiency of chemical oxygen demand, biochemical oxygen demand and suspended solids by anaerobic digestion process from the three pig farms was about 77, 93 and 70%, respectively.

Type
Climate Change and Agriculture Research Paper
Copyright
Copyright © Cambridge University Press 2018 

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