Grey water footprint as an indicator of sustainable waste wa-ter discharge - Ohře River Basin case study
DOI:
https://doi.org/10.35933/ENTECHO.2019.12.001Keywords:
water footprint assessment, grey water footprint, sustainable development goals, wastewater treatment plantsAbstract
The Sustainable Development Goals (SDGs), adopted by all United Nations Member States in 2015, call, among others, for the improvement of water quality by reducing water pollution, avoiding waste disposal in water and minimizing hazardous chemicals discharge into water. One of the tools that can be used for the sustainability assessment of pollution discharge into water is the water footprint. The paper calculates the grey water footprint of large municipal wastewater treatment plants in the Ohře River basin, located in the Czech Republic. Municipal wastewater treatment plants listed by the state-owned enterprise Povodí Ohře in Water Balance Management reports were selected for the analysis. The receiving body assimilation capacity for individual pollutants was determined and the grey water footprint at the inlet and outlet of the WWTP was calculated. Subsequently, the sustainability assessment of the WWTP discharges were carried out and related to the long-term average flow rates in the receiving water body. The analyses showed that the assimilation capacity of the watercourse is mostly utilized by the discharge of total phosphorus and ammonia nitrogen. The analysis also showed that (with some exceptions) the wastewater treatment plants treat water sufficiently and the assimilation capacity of the watercourse is not exhausted.
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Copyright (c) 2019 Libor Ansorge, Lada Stejskalová, Jiří Dlabal, Jiří Kučera
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