Managing taste and odour metabolite production in drinking water reservoirs: The importance of ammonium as a key nutrient trigger

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:244

Article

Perkins, R. G.^1,3  Slavin, E. I.²  Andrade, T. M. C.³  Blenkinsopp, C.²  Pearson, P.⁴  Froggatt, T.³  Godwin, G.³  Parslow, J.³  Hurley, S.⁶  Luckwell, R.⁵  Wain, D. J.^2,7,8 

[1] Cardiff Univ, Sch Earth & Ocean Sci, Pk Pl, Cardiff CF10 3AT, S Glam, Wales

[2] Univ Bath, Dept Architecture & Civil Engn, Bath BA2 7AY, Avon, England

[3] Dwr Cymru Welsh Water, Catchment Team, Pentwyn Rd, Nelson CF46 6LY, Treharris, Wales

[4] Dwr Cymru Welsh Water, Water Serv Sci, Pentwyn Rd, Nelson CF46 6LY, Treharris, Wales

[5] Bristol Water Plc, Bridgwater Rd, Bristol BS13 7AT, Avon, England

[6] Wessex Water, Operat Ctr, Claverton Rd, Bath BA2 7WW, Avon, England

[7] 7 Lakes Alliance,137 Main St, Belgrade Lakes, ME 04918 USA

[8] Colby Coll, Mayflower Hill Dr, Waterville, ME 04901 USA

关键词: 2-MIB;    Geosmin;    Taste and odour;    Reservoir;    Catchment management;    Drinking water;   

DOI  :  10.1016/j.jenvman.2019.04.123

来源: Elsevier

【 摘 要 】

Taste and odour (T&O) compounds (most commonly 2-MIB and Geosmin) in drinking water are becoming an increasingly global problem for water management. Here, the trigger(s) for 2-MIB and Geosmin production were investigated in Plas Uchaf reservoir (North Wales, UK) with detailed water sample analysis between 2015 and 2016. Historical abstraction data from this reservoir and 4 reservoirs in Somerset (England, UK) were compared statistically using Self-Organising Map (SOM) analysis. In-reservoir measurements (2015-2016) revealed an 85% reduction in ammonium from the primary external loading source led to lower 2-MIB and Geosmin concentrations, with peak concentrations of 2-MIB declining from 60 to 21 ng(-1) and Geosmin declining from 140 to 18 ng(-1). No other measured water chemistry parameter showed a significant difference between years. The SOM results support the in-reservoir findings, revealing 2-MIB and Geosmin to be associated with high ammonium relative to nitrate for all 5 reservoirs. We conclude that ammonium is key for stimulating cyanobacterial productivity and production of T&O compounds. Whilst it is well understood that adequate availability of phosphorus is required for rapid growth in cyanobacteria, and hence should still be considered in management decisions, we suggest that monitoring sources and concentrations of ammonium is key for managing T&O outbreaks in drinking water reservoirs.

【 授权许可】

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