Phosphorus and emerging micro-pollutants in surface waters: challenges and prospects for water quality improvement

An oversupply of Phosphorus in water bodies accelerates growth of algae and higher forms of plant life to produce undesirable impacts on overall water quality. Phosphorus inputs to surface waters arise from a variety of point and nonpoint sources. However much of the P is contributed by agricultural runoff and outfall of treated (or untreated) wastewater in receiving water-bodies. Point sourced-P inputs to waters have considerably decreased in recent years, at least partly driven by regulatory requirements, e.g. the EU Water Framework Directive. This has largely been achieved by removing P from treated wastewaters at sewage treatment works (STWs). Studies have shown that introducing an additional treatment step (“P-stripping”) can significantly reduce P in STW outfalls. Given P deposits are depleting, there is much interest in phosphorus recovery from wastewaters. A few STWs have already started to recover P as struvite (NH4MgPO4.6H2O) mineral – a substitute for commercially produced P-fertilizers. This requires major investment and is not economically viable at small STWs. Nonetheless it is a major breakthrough in terms of P recovery and its use. Effluents from sewage treatment works (STW) can often contain a complex mixture of residual microcontaminants, not removed during wastewater treatment. Organic micro-pollutants have been found in rivers receiving STW effluents. Such residual contaminants have become the focus of an emerging field of water quality study and are collectively referred to as pharmaceuticals and other personal healthcare products, PPHCPs. Many of these chemicals have the ability to effect the hormonal signaling of organisms and are called endocrine disrupting compounds (EDC). Such chemicals have shown some of the most damaging biological effects in aquatic organisms. Biological effects in the aquatic environment are typically related to the development of intersex in fish. Recent research shows the use of STW practices such as upgrading from using a combined trickling filter contact process to activated sludge treatment, ozonation, membrane filtration and use of suspended biofilm reactors reduces the amount of EDCs in waste effluent. It is thus possible to remove contaminants from STW effluents, but it will not be possible without major infrastructure improvements. This paper presents the challenges and prospects of P and micro-organic pollutants in surface waters.

[1]  L. Barber,et al.  Reproductive disruption in fish downstream from an estrogenic wastewater effluent. , 2008, Environmental science & technology.

[2]  A. Sharpley,et al.  The environmentally-sound management of agricultural phosphorus , 1994, Fertilizer research.

[3]  P. Hooda,et al.  Phosphorus Loss in Drainflow from Intensively Managed Grassland Soils , 1999 .

[4]  P. Hooda,et al.  A review of water quality concerns in livestock farming areas. , 2000, The Science of the total environment.

[5]  A. Ledin,et al.  Suspended biofilm carrier and activated sludge removal of acidic pharmaceuticals. , 2012, Water research.

[6]  Paul J. A. Withers,et al.  Relating soil phosphorus indices to potential phosphorus release to water. , 2000 .

[7]  P. Jjemba.  Excretion and ecotoxicity of pharmaceutical and personal care products in the environment. , 2006, Ecotoxicology and environmental safety.

[8]  S. Weigel,et al.  Determination of selected pharmaceuticals and caffeine in sewage and seawater from Tromsø/Norway with emphasis on ibuprofen and its metabolites. , 2004, Chemosphere.

[9]  A. Pollio,et al.  Erratum to “Ecotoxicological impact of pharmaceuticals found in treated wastewaters: study of carbamazepine, clofibric acid, and diclofenac”: [Ecotoxicol. Environ. Saf. 55 (2003) 359–370] , 2003 .

[10]  Akio Koizumi,et al.  Polyfluorinated telomers in precipitation and surface water in an urban area of Japan. , 2009, Chemosphere.

[11]  M. Bowes,et al.  How green is my river? A new paradigm of eutrophication in rivers. , 2006, The Science of the total environment.

[12]  William A. Jury,et al.  The Emerging Global Water Crisis: Managing Scarcity and Conflict Between Water Users , 2007 .

[13]  Constance Elizabeth Hunt,et al.  Thirsty Planet: Strategies for Sustainable Water Management , 2004 .

[14]  A. Breeuwsma,et al.  Phosphorus fertilisation and environmental effects in The Netherlands and the Po region ( Italy ) , 2015 .

[15]  Alden K Henderson,et al.  Persistence of pharmaceutical compounds and other organic wastewater contaminants in a conventional drinking-water-treatment plant. , 2004, The Science of the total environment.

[16]  Assessing the impact of nutrient enrichment in estuaries: susceptibility to eutrophication. , 2007, Marine pollution bulletin.

[17]  T. Heberer.  Occurrence, fate, and removal of pharmaceutical residues in the aquatic environment: a review of recent research data. , 2002, Toxicology letters.

[18]  Seasonal export of phosphorus from a lowland catchment: upper River Cherwell in Oxfordshire, England. , 2001, The Science of the total environment.

[19]  H. Tsuno,et al.  Advanced sewage treatment process with excess sludge reduction and phosphorus recovery. , 2005, Water research.

[20]  Dwayne R. Edwards,et al.  Relating Extractable Soil Phosphorus to Phosphorus Losses in Runoff , 1996 .

[21]  G. Gruau,et al.  The oxygen isotope composition of dissolved anthropogenic phosphates: a new tool for eutrophication research? , 2005, Water research.

[22]  P. Hooda,et al.  Manuring and fertilization effects on phosphorus accumulation in soils and potential environmental implications , 2001 .

[23]  S. Ryding,et al.  Swedish Agricultural Nonpoint Source Pollution: A Summary of Research and Findings , 1990 .

[24]  B. Joern,et al.  Phosphorus loss in agricultural drainage: historical perspective and current research , 1998 .

[25]  K. Carroll,et al.  Exposure to 17 alpha-ethinylestradiol and bisphenol A--effects on larval moulting and mouthpart structure of Chironomus riparius. , 2003, Ecotoxicology and environmental safety.

[26]  Sören Thiele-Bruhn,et al.  Pharmaceutical antibiotic compounds in soils – a review , 2003 .

[27]  J. W. Fletcher,et al.  Phosphorus utilization in rainbow trout (Oncorhynchus mykiss) fed practical diets and its consequences on effluent phosphorus levels , 2003 .

[28]  A. Hoekstra,et al.  The economic impact of restricted water supply: a computable general equilibrium analysis. , 2007, Water research.

[29]  L. Migliore,et al.  Effect of sulphadimethoxine contamination on barley (Hordeum distichum L., Poaceae, Liliposida) , 1996 .

[30]  Chris P Mainston,et al.  Phosphorus in rivers--ecology and management. , 2002, The Science of the total environment.

[31]  N. Skoulikidis,et al.  Analysis of factors driving stream water composition and synthesis of management tools--a case study on small/medium Greek catchments. , 2006, The Science of the total environment.

[32]  P. Hooda,et al.  The impact of treated sewage wastewater discharges on the phosphorus levels and hydrology of two second order rivers flowing into the Thames. , 2010, Journal of environmental monitoring : JEM.

[33]  E. Thurman,et al.  Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams, 1999-2000: a national reconnaissance. , 2002, Environmental science & technology.

[34]  C. Neal,et al.  Sewage-effluent phosphorus: a greater risk to river eutrophication than agricultural phosphorus? , 2006, The Science of the total environment.