Sewer rivers : minute of Committee on the practicability of purifying the water flowing from the River Medlock into the Duke of Bridgewater's Canal / Manchester and Salford Sanitary Association.

  • Manchester and Salford Sanitary Association.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: Sewer rivers : minute of Committee on the practicability of purifying the water flowing from the River Medlock into the Duke of Bridgewater's Canal / Manchester and Salford Sanitary Association. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Inches. Inches. Inches. 1? it 14 li If if if if n it li Height of the water as it passed over the weir. Experiment No. 5. Inches. Put 10 cwt. of lime in each lime tank. Began at 7-15. Worked until 9-0, when was obliged to stop, in order that the wheel in the warehouse might be worked. Besumed work at 11-10, and worked with both lime tanks until 5-0. Was obliged to stop for want of water to mix lime. Lime not nearly ex- hausted. Gauge at 7-15 lj Gauge at 12-0 If Gauge at 4-0 If Result. Good, especially in the afternoon, when the beams under the water near the weir were clearly visible. Experiment No. 6. Plugholes having been substituted for the paddles in the lime tanks, greater command over the delivery of the lime was obtained. This experiment was made to see how they would work. Gauge 2 10 cwt. of lime were worked for three and a half hours. Lime not exhausted. Good results. Experiment No. 7. 10 cwt. of lime put in the lime tank. Began at 11-0. Gauge all time 2 Took samples of water from river, mixing tank, and weir at 2 0. Stopped at 3-15. Water used to mix lime, 6,620 gallons. Water purified, 467,606 gallons. Result. Water so far purified that all the impurity was sepa rated as a flocculent precipitate, but all was not deposited at the weir. Experiment No. 8. Used 10 cwt. of lime. Began at 10-0. Stopped at 2-0. Gauge all time If Used 6,270 gallons of water to mix lime. Amount of water purified, 349,634 gallons. If li If If li If If 1 Result. Water clearer than in No. 7, but all impurity not sub- sided. The object of this experiment, as also that of Nos. 10 and 11, was to try to completely remove the impurity from the water by using excess of lime and diminishing the amount of water. It was found, however, that the settling tank was not long enough to allow all the precipitate to subside, and therefore this trial, and Nos. 11 and 12, must be considered as experiments.