Contribution of Wastewater Treatment Plant Effluents to Nutrient Dynamics in Aquatic Systems: A Review
- 21 May 2009
- journal article
- review article
- Published by Springer Science and Business Media LLC in Environmental Management
- Vol. 44 (2), 205-217
- https://doi.org/10.1007/s00267-009-9309-5
Abstract
Excessive nutrient loading (considering nitrogen and phosphorus) is a major ongoing threat to water quality and here we review the impact of nutrient discharges from wastewater treatment plants (WWTPs) to United States (U.S.) freshwater systems. While urban and agricultural land uses are significant nonpoint nutrient contributors, effluent from point sources such as WWTPs can overwhelm receiving waters, effectively dominating hydrological characteristics and regulating instream nutrient processes. Population growth, increased wastewater volumes, and sustainability of critical water resources have all been key factors influencing the extent of wastewater treatment. Reducing nutrient concentrations in wastewater is an important aspect of water quality management because excessive nutrient concentrations often prevent water bodies from meeting designated uses. WWTPs employ numerous physical, chemical, and biological methods to improve effluent water quality but nutrient removal requires advanced treatment and infrastructure that may be economically prohibitive. Therefore, effluent nutrient concentrations vary depending on the particular processes used to treat influent wastewater. Increasingly stringent regulations regarding nutrient concentrations in discharged effluent, along with greater freshwater demand in populous areas, have led to the development of extensive water recycling programs within many U.S. regions. Reuse programs provide an opportunity to reduce or eliminate direct nutrient discharges to receiving waters while allowing for the beneficial use of reclaimed water. However, nutrients in reclaimed water can still be a concern for reuse applications, such as agricultural and landscape irrigation.Keywords
This publication has 110 references indexed in Scilit:
- Long‐Term Effects of Recycled Wastewater Irrigation on Soil Chemical Properties on Golf Course FairwaysAgronomy Journal, 2005
- A comparative evaluation of money-based and energy-based cost–benefit analyses of tertiary municipal wastewater treatment using forested wetlands vs. sand filtration in LouisianaEcological Economics, 2004
- Assessing the soil quality of long-term reclaimed wastewater-irrigated croplandGeoderma, 2003
- A FUTURE PERSPECTIVE ON NORTH AMERICA'S FRESHWATER ECOSYSTEMSEcological Applications, 2000
- Effect of operating conditions on biological phosphorus removalWater Environment Research, 1998
- Environmental Impact and Mechanisms of the Biological Clogging of Saturated Soils and Aquifer MaterialsCritical Reviews in Environmental Science and Technology, 1998
- NUTRIENT CONCENTRATIONS IN WASTEWATER TREATMENT PLANT EFFLUENTS, SOUTH PLATTE RWER BASIN1Jawra Journal of the American Water Resources Association, 1997
- Algal-Available Phosphorus in Suspended Sediments from Lower Great Lakes TributariesJournal of Great Lakes Research, 1981
- Ecological perspective on water quality goalsEnvironmental Management, 1981
- Microbiological basis of phosphate removal in the activated sludge process for the treatment of wastewaterMicrobial Ecology, 1975