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Seasonal species composition, density and role of nematodes in activated-sludge effluent treatment works


Woombs, M and Laybourn-Parry, J, Seasonal species composition, density and role of nematodes in activated-sludge effluent treatment works, Water Research, 21, (4) pp. 459-467. ISSN 0043-1354 (1987) [Refereed Article]

DOI: doi:10.1016/0043-1354(87)90194-1


The species composition, seasonal distribution and role of the nematode communities in two oxidation ditch activated-sludge effluent treatment works in Cumbria, U.K. were investigated for a 12 month period (1982/83). The Diplogasteridae, and Diplogasteritus nudicapitatus in particular, dominated the nematode community in the mixed liquor, with lesser numbers of the family Rhabditidae. No correlation was apparent between seasonal patterns of nematode species composition and densities and COD, ammonia, nitrate, nitrite, chloride or inorganic phosphate in the sewage; there was a correlation with BOD5. Maximum numbers occurred at suboptimal temperatures indicating that temperature is overriden by a combination of other factors related to sewage quality and loading. Total daily energy contributions by the nematodes indicate that their role in bacterial grazing and decomposition processes in activated sludge is negligible. This is attributable to the unstable nature of the mechanical environment and an unfavourable relationship between nematode doubling time and sewage retention times. © 1987.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Other biological sciences
Research Field:Other biological sciences not elsewhere classified
Objective Division:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:Laybourn-Parry, J (Professor Johanna Laybourn-Parry)
ID Code:49490
Year Published:1987
Web of Science® Times Cited:14
Deposited By:Research Division
Deposited On:2007-12-14
Last Modified:2011-11-30

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