Seasonal water footprint assessment for a paint industry wastewater treatment plant

Paint manufacturing industries have many unfavorable environmental impacts such as freshwater consumption. Especially, paint industry wastewater treatment plants consume huge water volumes. Water footprint is described as the total volume of water required for a concept. The main aim of the study is to determine the seasonal variation of water footprint for a full-scale paint industry wastewater treatment plant which locates in Turkey. Grey water footprint was evaluated by Water Footprint Network methodology. Chemical Oxygen Demand (COD), Total Suspended Solids (TSS) and Oil and Grease (O&G) are the pollutant parameters to detect it. Water consumption of the plant contains sludge treatment, process water usage and other residential activities are defined as the component of blue water footprint. According to the results, maximum grey water footprint was measured in May as the value of 2455.840352 m3.month-1. The least total grey water footprint is related to August as 536.7118464 m3.month-1. Total blue water footprint is 4866.9 m3.year-1 and the peak value is 421.7 m3.month-1 in March. According to the study, the grey water footprint is higher than blue footprint. The results reveal that for decreasing water footprint, COD removal efficiency should be increased and wastewater reuse alternatives should be implemented.

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