Leicester. 



The ratio of effluent to brook at 

 Effluent and ^^^ tj^g ^f sampling was 1 to 1. 



' The volume of water in this small 

 brook is sometimes less than that of the combined 

 effluents from the farm in summer. The samples 

 tested varied somewhat, as was to be expected with 



In three samples drawn in November the dissolved 

 oxygen averaged fully 5 c.c. per litre — this was 

 evidently due to the lower temperature. None of the 

 other effluents showed more than about 1 c.c. when 

 they came to be analysed, and in a good many of 

 them it was apparently absent altogether. But the 



such a small flow of water, and they contained 

 appreciable amounts of suspended solids, no doubt 

 from the effluent drain pipes ; but, taking the 

 existing circumstances of small dilution into account, 

 the condition of the brook might be regarded as 

 fairly satisfactory from a chemical point of view. 

 The Anstey Brook at the time of the visits to the 

 farm appeared to be in a clean state. The stream 

 has a fairly rapid current in places, with a gravelly 

 bottom and an abundance of weeds and green 



copper chloride method for oxygen determination is 

 not at all suitable for brown-coloured effluents like 

 those from Leicester, and the results are doubtless 

 therefore distinctly too low. Of samples of water 

 from the stream one maintained its aeration fairly 

 well (brook low), one had its dissolved oxygen 

 nearly exhausted (brook very low), and one lost very 

 little of its dissolved oxygen (brook normal) — as this 

 was jointed ten days in September it was a severe 

 test. 



growths. Holes occur in places from 3 ft. to 6 ft. 

 deep, and some of these contain fish. The brook 

 had a fair amount of dissolved oxygen, and there was 

 no smell or sewage fungus noticeable. The effluent 

 from another small farm close by runs into the brook 

 below the Leicester outfall. 



Nuleanoo 

 and Difficulties. 



The operations attending the 

 removal of the sludge from the 

 settling tanks take some time, 

 and are attended by considerable smell, and this 

 nuisance is accentuated in hot weather ; the smell, 

 however, does not reach to a g^reat distance from the 



39 



