Water Science & Technology: Water Supply Vol 1 No 2 pp 217–223 © IWA Publishing 2001
Experience in controlling Asellus aquaticus in water distribution systems
A Oleszkiewicz*, M Geringer d'Oedenberg** and J Chapman***
*
Saur Neptun Gdańsk S A, ul. Wałowa 46, 80-858 Gdańsk,
Poland
**
Saur Neptun Gda´sk S A, ul. Wałowa 46, 80-858 Gdańsk,
Poland
***
Dynamco, 22-30 Sturt Road, Frimley Green, Camberley, Surrey GU16 6HZ, UK
ABSTRACT
Asellus aquaticus is one of the nuisance organisms found in water
distribution systems. Case studies of operations aimed at control of this
crustacean and its disinfestation, carried out in two water distribution
networks: in Pevensey Bay (Eastbourne, UK) and in Gdansk (Poland), are
presented. Raw water reservoir receiving surface water was the source of
infestation in Pevensey Bay. In Gdansk A. aquaticus probably penetrated
the water distribution system with surface water getting into a leaky
collecting well receiving groundwater from a chalk aquifer. The presence
of organic matter in water entering the systems seemed to favour the
infestation. Chemical treatment with pyrethrins (Pevensey Bay) and
peracetic acid/hydrogen peroxide preparation (Gdansk) was used. The
concentration of pyrethrins was 10 (g/dm3 and the average dose
of peracetic acid was 4 mg/dm3. Both chemical treatments were
found quite effective, however, some sections of the (much larger than
Pevensey Bay) distribution network in Gdansk were not completely cleaned
of the infestation.
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