Sammanfattning

The issues of diffuse and point source phosphorus (P) pollution in river systems are presented using a catchment model to assess nutrient behaviour, seasonal effluent standards and biosolid substitution. A process-based, dynamic water quality model (INCA-P) has been applied to four UK catchments, namely, the Rivers Tywi, Wensum, Lunan and Hampshire Avon, to simulate water fluxes, sediments, total phosphorus and soluble reactive phosphorus (SRP) concentrations. The model has been used to assess impacts of both agricultural runoff and point P sources from wastewater treatment plants (WWTPs) on water quality. With increasing costs for P fertilizer and P reduction at WWTPs, a strategy of recycling P from WWTPs as biosolids to substitute for fertilizers in vulnerable catchments has been investigated. Significant reductions in P concentrations are achieved if this substitution were implemented on a large scale. Reductions in SRP of between 6% and 41% can be achieved using this strategy. The effects of implementing new WWTP standards are shown to reduce SRP by 30%. Seasonal consent standards applied in only summer months could reduce SRP by 53% and achieve a substantial reduction in treatment costs year round.

Nyckelord

biosolid substitution; catchment model; phosphorus management; WWTP seasonal effluent

Publicerad i

Hydrology research
2015, Volym: 46, nummer: 3, sidor: 313-324
Utgivare: IWA PUBLISHING

SLU författare

• Futter, Martyn

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    

Globala målen

SDG6 Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla
SDG12 Säkerställa hållbara konsumtions- och produktionsmönster


UKÄ forskningsämne

Oceanografi, hydrologi, vattenresurser
Miljöledning


Publikationens identifierare

DOI: https://doi.org/10.2166/nh.2014.100

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/76176