[Report 1913] / Medical Officer of Health, Lanark County Council.

  • Lanarkshire (Scotland). County Council
Date:
1913
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1913] / Medical Officer of Health, Lanark County Council. Source: Wellcome Collection.

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    Samples Examined in the Chemical Laboratory Classified according to Administrative Authority under which they were Obtained. Year. Rivers Pollution. Public Health Department. Food and Drugs. Total. Sewage Works. Trade Effluents. Streams. Water Supplies. Public. Private. Special. 1902 49 87 180 18 16 350 1903 77 101 78 35 35 4 330 1904 55 54 85 40 38 8 34 314 1905 130 53 105 16 35 1 55 395 1906 69 7 20 1 32 10 37 176 1907 275 47 38 116 44 240 1 j 761 1908 61 52 77 101 41 418 6 756 1909 420 41 65 117 39 387 30 1,099 1910 77 49 83 187 55 375 115 941 1911 84 76 60 84 47 365 77 793 1912 30 30 69 100 35 379 1,635 2,278 1913 26 47 93 63 29 430 1,424 2,112 Samples o-f Sewage. i Sewage Works.—Total samples, 26. During the year systematic sampling has only been carried out at one sewage work, viz., Bellshill. Sampling has, however, been made over a period of 6 hours on three occasions, and it is intended to take such samples once a month for a year, when it is hoped, through examination of the sewage under all conditions, to arrive at a definite idea of what purification may be looked for from a complete installation consisting of septic tanks and single continuous filters. The percentage degree of purification, calculated on albuminoid nitrogen and oxygen absorbed, for these samplings has been as follows :— May. Nov. Dec. Albuminoid Nitrogen, 64 65 84 Oxygen Absorbed, ... 61 64 74 Average, 62*5 64-5 79 While it may be claimed that the degree of purification at these works is good, the result in December of 79 per cent, being very good, j it has to be pointed out that the effluent is not satisfactory when compared with a “ standard effluent ” as defined by the Royal Com- missioners on Sewage Disposal in their final report. A filter effluent.
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