A Case Study of Operating Subsidies and Basic Treatment Unit Costs for Public Wastewater Treatment Facilities in Seafood Processing

초록

This study analyzes the operating subsidies provided by local governments and the basic treatment unit costs in public wastewater treatment facilities dedicated to seafood processing to generate fundamental reference data. Public wastewater treatment facilities for seafood processing in three local governments in Gangwon Province were selected for this analysis. The characteristics of wastewater from seafood processing revealed that the annual discharge quantity remained relatively stable after 2021, with minimal seasonal fluctuations. This stability suggests no significant difference between the peak and off-peak seasons in the seafood processing industry, likely due to the decrease in domestic fishery catch and increased import dependence. The analysis of the total operating costs revealed that the sludge treatment expenses were the highest, accounting for 33.4% of the costs in local government A. Labor costs were the most significant expenses in local governments B and C, at 28.6% and 39.9%, respectively. Regarding local government subsidies, 34.0% of the total operating costs were covered by local government A, 38.0% by local government B, and 50.5% by local government C. Furthermore, the unit cost of wastewater treatment per ton was calculated to be KRW 5,316/ton for local government A, KRW 3,988/ton for local government B, and KRW 2,051/ton for local government C. Regarding organic matter, the treatment unit cost was the highest for local government C at 1,659 KRW/kg BOD, followed by 1,334 KRW/kg for local government A and 1,177 KRW/kg BOD for local government B. © 2024, Korea Society of Waste Management. All rights reserved.

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