[Report 1938] / Medical Officer of Health, West Lancashire R.D.C.
- West Lancashire (England). Rural District Council.
- Date:
- 1938
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: [Report 1938] / Medical Officer of Health, West Lancashire R.D.C. Source: Wellcome Collection.
52/138 page 46
![The proposal is that the sewage should pass down a 9 inch pipe into a deflector box fixed in the middle of each tank and discharge into channels around the four walls. Certain alterations have been found necessary at the humus tanks and to the desludging arrangements. It is proposed to abandon the existing sludge beds which consist of underdrained clinker beds with earth banks. When sludge is pumped onto the beds the sludge liquor percolates through these banks and runs off over the surrounding ground, only a small amount finding its way to the sludge liquor drain. Under the new proposals all sludge both from the existing works and the proposed extension is to drain to a sludge pumping station from which it is to be pumped to the proposed sludge digestion tanks, except for a small amount of activated sludge which will be returned to the aeration unit as previ¬ ously mentioned. Considerable difficulty has been found in disposing of sludge from the present works, and with the rapidly increasing population a sludge digestion plant has been considered essential. The close proximity of dwelling houses has a considerable bearing on the matter. The sludge digestion tank will have a capacity of 25,000 cubic feet, and is to be fitted with mechanism supplied by the Dorr-Oliver Co., Ltd. Sludge liquor will overflow and discharge by gravity to the screening chamber at the inlet to the works. The sluge itself will be discharged under hydrostatic head along a 6 inch main to the sludge beds. These consist of 10 shallow concrete basins filled with an average of 15 inches of clinker and underdrained with agricultural tiles, their cross area being 1,250 sq. yds., or 1 sq. yd. to 10 persons. The sludge liquor return drain connects to the main outfall sewer to the works. It is anticipated that the completed extension of the works will be opened in June, 1939. Certain houses in Little Altcar are connected to the Formby sewerage system. At the time when the Formby sewerage system was being carried out certain land was required for disposal works, and the owner of the said land sold it on condition that certain areas of his land situate in Little Altcar, should drain into the Formby sewerage system. A small installation serves the greater part of Rufford village. Treatment is by means of septic tank and revolving sprinklers over ])ercolating filters. 'I'he following conversions have been effected during the year :— Privies to waterclosets . . 47 Privies to pails . . . . 15 Pails to water-clo.sets . . . 7 hdxed receptacles to metal bins. . 74](https://iiif.wellcomecollection.org/image/b30261648_0052.jp2/full/800%2C/0/default.jpg)
