2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/22/2019 | 9:30 AM - 9:45 AM | INPUTS FROM WASTEWATER TREATMENT PLANT EFFLUENTS INFLUENCE THE TEMPORAL VARIATION OF NUTRIENT UPTAKE IN A TEMPORARY STREAM | 151 G

INPUTS FROM WASTEWATER TREATMENT PLANT EFFLUENTS INFLUENCE THE TEMPORAL VARIATION OF NUTRIENT UPTAKE IN A TEMPORARY STREAM

Effluents from wastewater treatment plants (WWTP) are sources of nutrients, organic matter, emergent contaminants, and bacteria for receiving streams. WWTP inputs affect stream chemical conditions as well as in-stream nutrient uptake capacity, altering the amount and fate of nutrients exported. In regions with water scarcity, such as the Mediterranean region, the influence of WTTP inputs on receiving streams can vary broadly over seasons because the stream hydrological regime is intermittent while WWTP inputs remain relatively constant over time. Our aim was to examine the influence of inputs from a WWTP on the temporal variation of nutrient uptake of a temporary receiving stream. To do so, we analyzed data collected during a 10-year period that encompassed a wide range of hydrological conditions. Results showed higher in-stream bioreactivity for nitrogen than for phosphorus. In particular, the stream was a hot spot of nitrification. We also found a high temporal variation of nitrogen uptake, which was lower during low flow conditions when the WWTP influence was higher. Management strategies should consider the interplay between WWTP operation and stream biogeochemical functioning and its temporal variation to improve stream water quality in urban landscapes.

Intermittency
Temporal
Nutrients

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Presenters/Authors

Eugènia Martí (), Center for Advanced Studies of Blanes (CEAB-CSIC), Spain, eugenia@ceab.csic.es;