KWR Kees Roest by KWR Kees Roest
08 March 2019

Phosphorus removal at small sewage treatment plants

This review summarises technologies available and perspectives for phosphorus (P) removal for small sewage treatment plants (STPs; ...

A Review of Phosphorus Removal Technologies and Their Applicability to Small-Scale Domestic Wastewater Treatment Systems

Introduction Phosphorus (P) releases due to anthropogenic activity promote eutrophication in aquatic ecosystems. For example in the UK, the main sources of P entering rivers are sewage effluent and agricultural run-off (Bowes et al., 2015) with up to 70% being attributed to sewage discharges (EA, 2015). This reality has resulted in tightening P discharge standards and increased pressure on the water industry to reduce P loads entering rivers, particularly to ecologically sensitive locations (EC, 2000; UKTAG, 2013). As such, targeted P-removal has become increasingly common in large, urban wastewater treatment plants (WWTPs). However, sensitive watercourses also can be in more remote locations, receiving P discharges from smaller WWTPs. Further, wastewater from smaller communities is often treated less rigorously (Molinos-Senante et al., 2014; Lutterbeck et al., 2017) and the potential negative impacts of P release from small treatment works may be underestimated (Bowes et al., 2015; May et al., 2015). The removal of P from wastewater can be performed using physico-chemical methods, biological treatment, and/or combinations of both, and many large-scale techniques are well established (Yeoman et al., 1988). However, translating such technologies to effective use at smaller scales has rarely been done and, as such, there is little information regarding the implementation...

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