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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![Estuaries Sample. Samples from estuaries in Essex : Sour S <. Severn Estuary, Mon- mouthshire : Severn 1,. ” Percentage of mud settled through Concentration | Concentration Sit, alten: of mud (gm. of settled dry weight sewage per 100 litres).| (per cent.). 10 20 30 50 70 90 min. | min. | min. | min. | min. | min. 21:2 0 2 6 12 39 62 78 20-9 0 2 6 13 38 59 75 20-9 0 3 6 12 32 49 62 21-7 5:0 3 7 17 50 69 83 20-5 5:0 ys 6 Li 51 70 84 21-4 5:0 Z $j 19 55 76 92 2a 0 + 8 12 25 44 56 B22 0 3 ey 12 5 47 61 25°4 5:0 3 9 26 54 63 67 24-8 5°0 5 it 34 63 72 76 23°7 0 3 6 11 40 70 87 24-0 0 3 6 11 38 67 85 24-7 0 3 6 12 36 64 80 26:6 5:0 2 6 26 64 ry) 84 26°8 5:0 2 5 24 61 75 83 26:6 5:0 3 8 30 77 95 | 104 30-0 0 6 11 yi 40 58 75 30-0 5:0 6 11 18 53 72 86 = Volume of bacterial suspension added (per cent. of volume of mud suspension). Sample. SM 130 bo = ooooCoOm- SE) 2110 Fi] SOM Caenrean) (es) See) Si) (eee) ouooouLpy, poued ; 9 ft. after : Concentration of mud (gm. dry weight per 100 litres). 10 min. | 20 min. | 30 min. | 50 min. | 70 min. | 90 min. 15-8 6 12 17 30 40 53 > 6 10 15 24 34 46 re 6 10 16 a) at 4] *: 5 9 14 24 on 49 29 8 13 18 28 40 52 2 5 10 15 ae 38 53 a 7 13 18 a3 48 60 i 5 9 14 30 45 59 2755 4 8 i 34 56 Te “3 2 7 11 29 52 67 “ 4 9 13 35 == == © 4 9 14 36 62 76 . 4 8 12 ol 56 69 Fs 2. 5 10 a2 Bs 70 * 2 6 12 36 60 72 . 2 6 12 35 57 70](https://iiif.wellcomecollection.org/image/b32171869_0323.jp2/full/800%2C/0/default.jpg)
