Methods of chemical analysis as applied to sewage and sewage effluents.

  • Great Britain. Ministry of Health.
Date:
1929
Catalogue details

Licence: Public Domain Mark

Credit: Methods of chemical analysis as applied to sewage and sewage effluents. Source: Wellcome Collection.

    68/86 (page 56)
    APPENDIX 1. * Changes undergone by Sewage when kept in a full bottle (not in the dark). On Monday, 9th June, 1902, at 11 a.m., three Winchesters of Ealing Sewage were drawn. At 5 p.m. in the laboratory their contents were poured into a large pail, and any large pieces of paper and other coarse solids were rejected. The pail was then kept constantly stirred, and four half Winchesters were filled from it by pouring into each a beakerful in turn, 7.e., every bottle received one beaker before the second beakerful was poured into any. So far as could be judged, the samples were very even. The bottles were filled completely and kept at laboratory temperature. Novalis No, 2. No. 3. No. 4. Analysed 10th June, 1902 11th June, 1902. 12th June, 1902. 16th June, 1902. Parts per 100,000 by wetzht. Ammoniacal nitro- gies 9°98 10-21) Two drops of | !9°°8) two drops of |!1°78 ) six drops of So's Na, CO, Aq. \ Na, CO, Aq. Na, CO, Aq. Albuminoid nitro- es i ie es een ey fas 1-79 | added.t Str J added. 0-72 | added. Nitrous nitrogen .. 0-0 —— — Ae Nitric nitrogen * Not tested for. aa Ss got Total nitrogen by Kjeldahl method 13-56 13-48 13-49 13-57 Blank es (0-33 in 10-19) (0-33 in 10-13) (0°33 in 10-14) (0-33in 10-20) “X nitrogen 1-76 1-48 1-27 1-07 Total Organic nitrogen oh 3-58 3-27 2°81 1-79 “Oxygen absorbed”’ from N/8 perman- ganate at 26:7° C. (80° F.) at once... 3-00 3-39 3-93 5-10 *‘Oxygen absorbed” from N/8 }erman- ganateat 26:7° C. (80° F.) after 4 R hours .. 16-87 15:77 15-23 14-53 (a) (8)t (Cc) Chlorine 10-60 10-60 10-54 10-66 10°50 10:30 Total solids (gravi- 7 {56-4 Volatile 7 J§ 53°6 Volatile 1 J 53:4 Volatile .q {55-8 Volatile. metrically) .. | !19°7 {een Non-Vol.|!!5°7 462-1 Non-Vol.| 14! 1607 Non-Vol.|!!2°3 | 56-5 Non-Vol. Solidsin suspension 1 f 289 Vol. in [eer Vals 19 J 34-1 Vol. ‘qo § 29:4 Vol. 4211 {13.9 Nonvol, [403 Te Non-Vol,| 492 { 6-1 Non-Vol.| 369 } 7:5 Non-Vol. Solids in solution ..} o5,, §27°5 Vol. 4 { 23:4 Vol. ‘o J 19:3 Vol. a f 264 Vol. ze { 50-1 Non-Vol.| 7°* 152-0 Non-Vol.| 739 (54-6 Non-Vol.| 75°4 1 49-0 Non-Vol. Parts per 100,000 by Volume. Solids by centrifuge 289 244 257 199 Remarks .. Rather more turbid than the preceding ——_—_—_———| samples. There was now a smell of sulphuretted hydrogen along with that of sewage. Not appre- ciably blackened. Alkaline. Much the same as Nos. 1 and 2. The samein charac- ter as Sample No. J Turbid and brown. Not a very large amount of brown sediment. Sewage smell. Alkaline. first instance.