Estuary of the River Mersey : The effect of the discharge of crude sewage into the estuary of the River Mersey on the amount and hardness of the deposit in the estuary.
- Great Britain. Water Pollution Research Board
- Date:
- 1938
Licence: Public Domain Mark
Credit: Estuary of the River Mersey : The effect of the discharge of crude sewage into the estuary of the River Mersey on the amount and hardness of the deposit in the estuary. Source: Wellcome Collection.
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![Experi- vere ig Moisture (per cent.). ea Snipes sewage | Method of | (<7 Sh Period of Nie! added | drying. of dry ‘| drying. ae : weight). A | B C | Mean i Mersey mud S 462 in 0 Soxhlet 3:9 0 81 81 81 81 (A, B, C) Estuary water SM thimbles. 1d hrs 50 52 a2 51 158. Concn. 30 parts ee 48 50 49 49 per 100,000. Stirred Gees; 45 47 46 46 3 days. 234 ,, 30 32 32 31 30. os 25 26 25 48 ,, Te 13 14 13 O44, 8 10 11 10 FA es 3 4 4 4 PS ee, Z 1 2 Dt Z As experiment 1 1 Soxhlet 4-2 0 — 81 81 81 (B, C) thimbles. 1ghrs. | — 52 50 51 O fs — 50 48 49 Ob ss — 47 45 46 234 ,, = Bi 31 32 302; — 25 24 25 48 _s,, — 13 12 13 SA ere — 10 9 10 7) Reve — 3 3 3 FSe ye — 1 pe wy 3 As experiment 1 5 Soxhlet 4-9 0 81 81 81 81 (A, B, C) thimbles. lghrs.| 48 48 48 48 Tere 46 46 46 46 Gans, 43 43 43 43 23505 29 28 29 29 SU ee, a) De 23 23 48> ., 11 12 11 11 i 7 7 6 7 Lanes, 1 1 1 1 TEs 0 0 0 0 6 Mersey mud S$ 462. 0 In —— 0 62 62 62 62 (25.5, C) 1 kg. wet mud in crucibles. 7 hrs 59 59 59 59 60 litres sea water. Ue 55 56 55 55 30 litres mud a 54 53 53 53 suspension with 432 ss: 50 50 50 50 (6) 30 litres tap water SG. 4] 41 39 40 (7) 30 litres sewage. 144 ,, 36 35 32 34 Settled 2 days. io 27 Ae) 23 25 Sludge filtered on 2A Oe 17 19 15 17 Buchner funnel and transferred to crucibles. 7 As experiment 6 Added In — 0 65 63 64 64 (A, B, C) crucibles. 7 hrs 61 61 61 61 DAS. 58 57 57 57 See, 56 55 55 55 48, 52 St 51 51 06, <5 42 41 4] 41 144 es, 33 35 34 34 LO 2 ae 25 25 25 25 240, 15 16 16 16 8 2 kg. Mersey mud 0 ine Petr 4-]J a8, 73 73 73 73 (A, B, C) | S462in 80 litres sea dishes. 1 day 67 68 68 68 water. 40 litres of 2days| 61 62 61 61 suspension mixed Saat: 55 56 55 55 with AS A, 48 49 48 48 (8) 40 litres tap water Sees 40 42 40 4l (9) 40 litres sewage. on 32 33 32 32 Settled overnight. OME. 25 25 24 24 Sludge stood a further 3 days in a beaker, and water then re- moved. Transferred to Petri dishes. o 16972 a4](https://iiif.wellcomecollection.org/image/b32171869_0363.jp2/full/800%2C/0/default.jpg)
