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Definition: Primary treatment (of waste water)
Category: Environment
Treatment of wastewater by a physical and/or chemical process involving settlement of suspended solids, or other process in which the BOD5 of the incoming wastewater is reduced by at least 20% before discharge and the total suspended solids of the incoming wastewater are reduced by at least 50%. https://ec.europa.eu/eurostat/ramon/statmanuals/files/OECD_ESTAT_JQ_Manual_version_4_2018.pdf
Source:
Eurostat, "Data Collection Manual for the OECD/Eurostat Joint Questionnaire on Inland Waters and Eurostat regional water questionnaire", version 4 (2018), Luxembourg, 2018
Eurostat, "Data Collection Manual for the OECD/Eurostat Joint Questionnaire on Inland Waters and Eurostat regional water questionnaire", version 4 (2018), Luxembourg, 2018
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