Report of the Highway and Sewerage Committee of the Local Board of Health.

  • Leicester (England). Local Board of Health. Sewerage and Highway Committee.
Date:
1852
Catalogue details

Licence: Public Domain Mark

Credit: Report of the Highway and Sewerage Committee of the Local Board of Health. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    It docs not appear, therclbre, that in this respect much credit is due to the lime, because at page 69, they state of a compound fluid, mixed of equal portions of sewage water (No. 1 to 7) ^rtth four measm-es of water, but wdthout any application of lime, the oflensive odoius had, to a great extent, disappeared, after water had been exposed to the air twenty-four hours. This second series consisted of sewer waters, marked No. 1 to 7 s. Mh. Wicksteed’s Statements. P. 31 “Upon this mixture of waters the chemists report, that the offensive odour was entirely removed, in a few minutes, bj a small quantity of lime, but not by chloride of zinc, even when used in lar/,'e quantities; and they subsequently found that this fluid had less power of removing the offensive effluvia than a small quantity of lime.” P. JO. (Written Report.) 'Liming and Deodorising. It is proposed that the sewage water be deodorising by mixture with lime, by which means the noxious eflBuvia from the reservoirs will be destroyed.” P. 31. (Mr. Wicksteed, quoting the chemists’ report.) “ That most noxious gas, the sulphuretted hydrogen, is entirely removed from it, and it may be fairly as ■ serted that seven-eighths of the offensive effluvia of the water are entirely removed by the employment of lime.” Chemists’ St.vtements. P. 66. “ The oflensive odour was en- tirely removed in a few minutes, by a small quantity of chloride of lime; but not by chloride of zinc, even when used in large quantities, and the mixture was preserved for a month. It was subsequently found that this so -called deodorising fluid had less power of removing the oflensive effluvia than a small quantity of lime.” P. 67. “ Deposit by li?ne water. The mixed water was heated with one third of its volume of a saturated solution of lime in water. The solid matters began to be pre- cipitated in five minutes, and the precipita- tion was complete in half an hour.” P. 67. “ The residuary tvater of the lime process retains a fishy and disagreeable odour. It contains ammonia and sulphur {the latter combined with the lime as sulphu- ret of calcium'): that most noxious gas, the sulphuretted hydrogen, is entirely removed frturtET^nd perhaps it may be fairly as- serted that sevp.n-p.ighth.s of the offensive eflluvia of the water are entlrbly removed byTn^employment of lime in the propor- tion advised.” A Of the compound and diluted sewage waters intended to represent the sewage, as it will be with a systematic water supply, and after the comple- tion of the drainage works, we have the foUondng;— Mr. Wicicstbed’s Statement. P. 32. “ The effect of the lime process would be to preeipitate both the earthy salts and organic matter contained in the river water, as well as in the sewer water, to which it was added.” P. 15. “ The water flowing from the reservoirs into the river will be pure.” Chemists’ Statejients. P. 69. “ The offensive odour had, to a great extent, disappeared after the w'ater had been exposed to the air twenty-four hours.” P. 70. Deposit by Z,i?ne ^ater.—“The sewage water was mixed with one-third of its volume of lime water. The offensive smell was in great part removed. There was no trace of sulphuretted hydrogen, and the residuary water contained no sulphnret of calcium.” There is so much careful and ingenious liypothesis in ]\Ir. Wicksteed’s statements, at pages 22 and 23, respecting tlie application of sewage manure by pipes, &c., that 1 find it useless to discuss the question. If liis remarks lie approved, lie will be able to take the credit; but if dis- approved, there is uotliiug to prevent him from repudiating the opinions cxprcssctl here. After having thus, to his own salisfaction, disposed of
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