Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . ill be stillfurther reduced to liquid form by bacterial solution. The processof disintegration that goes on evolves a considerable amount ofcarbon dioxide and ammonia which filters through the process that now goes on in the tank is that of liquefying theorganic matter and changing it from organic to the inorganicstate. The bacteriologist recognizes in the process of sewage disin-tegration the work of two classes of bacteria, the aerobic or those SEWAGE DISPOSAL 173 bacter
Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . ill be stillfurther reduced to liquid form by bacterial solution. The processof disintegration that goes on evolves a considerable amount ofcarbon dioxide and ammonia which filters through the process that now goes on in the tank is that of liquefying theorganic matter and changing it from organic to the inorganicstate. The bacteriologist recognizes in the process of sewage disin-tegration the work of two classes of bacteria, the aerobic or those SEWAGE DISPOSAL 173 bacteria that work by reason of air and do their work only in itspresence and the anaerobic or those that work in the absence ofair. In the action of the sewage-disposal plant both kinds ofbacteria are at work. If, in the final stage where the sewagepasses into the filter, air can be carried into the earth the actionwill be hastened. It is evident that, since the sewage entering the tank isalmost entirely dissolved, under ideal action this system wouldgive very little trouble, but actually as the sewage enters the. Fig. 152.—Section of the septic tank in Fig. 151 showing details of construction. tank the disturbance caused by the incoming water forces someof the undigested matter into the outlet and being carried intothe filter bed it will be deposited at the first opportunity. Thiswill cause the filter bed to fill up with undigested sewage at thepoint nearest the entrance, and in course of time it will stop thepipe because of this accumulation. To avoid such an occurrence, tanks have been built in which anautomatic siphon discharges the effluent whenever a certainquantity has collected. Such a tank is shown in Fig. 153. Withthis arrangement, the sewage enters the first tank at -4, and passes 174 MECHANICS OF THE HOUSEHOLD into the second tank at B. At S is shown an automatic siphon,so made that when the effluent has collected to the height of thewater line, the siphon automaticall
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkmcgrawhillb
