Journal
WATER
Volume 14, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/w14111821
Keywords
sewage treatment plant; sewage sludge; anaerobic digestion; reduction; energy
Categories
Funding
- Korea Ministry of Environment (MOE) as Waste To Energy-Recycling Human Resource Development Project [2020-0300]
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By conducting material flow analysis on STP, the introduction of Co-AD can significantly reduce the amount of sludge generated, improve energy production efficiency, and reduce greenhouse gas emissions.
As the amount of sewage sludge (SS) is increasing worldwide, anaerobic digesters (ADP) are being distributed to reduce it and treat it in an environmentally friendly way. In Korea, 20 years have passed since the introduction of ADP, but the number of sewage treatment plants (STP) installed with ADP is only about 10% of the total STP. Accordingly, problems and improvements were examined through material flow analysis targeting STP, and the effect of introducing anaerobic digestion (AD) was analyzed as a way to solve them. As a result of the analysis, the amount of SS generated by the STP (SS-ADP + Co-ADP) installed and operated by an AD was 0.54 kg/m(3), and the facility without it was 0.77 kg/m(3), showing a reduction effect of about 31%. The SS reduction effect of the facility that only used SS-AD was found to be reduced by 21-24% TOE (Ton Of Equivalent))/day, which has the effect of reducing 794,867 kg-CO2/day of greenhouse gas. In terms of energy efficiency, Co-AD was 86% higher than SS-AD, and biogas production yield was 90% higher than that of SS-AD. Therefore, it is necessary to introduce Co-AD into STP in terms of reducing SS, energy production, and greenhouse gas reduction.
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