Title: Biological investigation of the Common Lake Stream
Author: J.B. Fowler
Document Type: Monograph
Annotation: EA additional title info: February 1987
Abstract:
Following a request from the Pollution Inspector, a biological survey of the Common Lake Stream was undertaken on 10 February 1987. The object of the survey was to determine the effect of effluent discharged from North Devon Meat Abbatoir on the aquatic macroinvertebrate fauna of the Common Lake Stream. Surveys carried out in 1981 (1) and 1982 (2) indicated the effluent from North Devon Meat Limited was having a severe impact on the invertebrate fauna of this stream. North Devon Meat Limited has since made modifications to its effluent treatment and this now involves the following; air flotation, after which effluent passes to a large oxidation ditch, (a derivative of the Pasveer system with rotors to maximise aeration), this is followed by secondary settlement before passing to two lagoons. Finally the effluent is sprayed on to land. A survey undertaken in 1985 (3) after these modifications were made, concluded that the invertebrate community of the Cannon Lake Stream had undergone an improvement in terms of diversity and abundance, however, the fauna observed still indicated the presence of organic pollution, although it was no longer of a severe nature.
Publisher: National Rivers Authority
Publication Date: 1987
Publication Place: [Exeter]
Subject Keywords: Biological surveys; Effluents; Industrial pollution; Macroinvertebrates; BMWP; Runoff
Geographic Keywords: Devon; Torridge
Extent: n.p. [10]
Permalink: http://www.environmentdata.org/archive/ealit:2776
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