| Assessing the Grey Water Footprint of a Municipal Wastewater Treatment Plant: a case study in Chaharmahal and Bakhtiari province |
| کد مقاله : 1653-IWWA |
| نویسندگان |
|
محمدمهدی فوزی *1، علیرضا راد2، حامد ولی پور2، فرناز فرامرزیان2، مهسا حیدری2 1دانشگاه اصفهان 2شرکت مهندسین مشاور جامع کار سپاهان |
| چکیده مقاله |
| Conventional wastewater treatment plant (WWTP) assessments primarily focus on pollutant removal efficiencies, potentially overlooking the environmental implications of residual pollutant loads and receiving water quality requirements. This study evaluated the grey water footprint (GWF) of a municipal WWTP employing an aerated lagoon system in Chaharmahal and Bakhtiari Province, Iran. Nine wastewater samples, including seven grab samples and two composite samples, were collected from the influent and effluent in February 2026. BOD, COD, TSS, TKN, and TP were analyzed. The results showed that COD was the critical pollutant in influent grab samples, with a maximum GWF of 45,315 m³/month, whereas TKN determined the maximum effluent GWF at 22,445 m³/month. For composite samples, COD was the critical pollutant in both influent and effluent, with maximum GWF values of 40,802 and 15,627 m³/month, respectively. The GWF reduction efficiencies were 50.47% for grab sampling and 61.70% for composite sampling. Regarding conventional treatment performance, TSS exhibited the highest removal efficiency in both grab and composite samples, at 81.8% and 77.6%, respectively, while TP showed the lowest removal efficiencies, at 8.8% and 5.8%, respectively. These findings demonstrate that GWF provides a complementary perspective on WWTP performance by identifying critical pollutants based on their loads and applicable water quality criteria. The differences between sampling approaches further highlight the importance of sampling strategy in GWF assessment. Integrating GWF into municipal wastewater management can support pollutant prioritization, treatment optimization, and the protection of receiving water resources. |
| کلیدواژه ها |
| Water quality management, Municipal wastewater, Water footprint, Pollution load, Aerated lagoon |
| وضعیت: پذیرفته شده برای ارائه شفاهی |
