Public works . as suspected that in somecases the settlement of matter in the mains which hadpassed through breaks in the filter mat have been in-correctly attributed )by the oi)erators to secondarychemical reactions. At any rate, it is believed thatfloe passing the filters will settle and accumulate inmains and reservors and be occasionally picked upby temporarily increased velocities and make turbidthe water delivered to the consumers. Ai)out two years ago efforts were made at theMontebello filters to design a device that would de-tect immediately any turbidity or presence of coagu-lated par
Public works . as suspected that in somecases the settlement of matter in the mains which hadpassed through breaks in the filter mat have been in-correctly attributed )by the oi)erators to secondarychemical reactions. At any rate, it is believed thatfloe passing the filters will settle and accumulate inmains and reservors and be occasionally picked upby temporarily increased velocities and make turbidthe water delivered to the consumers. Ai)out two years ago efforts were made at theMontebello filters to design a device that would de-tect immediately any turbidity or presence of coagu-lated particles, this device to be applied to the efflu-ent from each filter. The first plan tried was to passa small portion of the effluent water through a 3-inchpipe set vertically with a light at the bottom, thewater passing vertically upward through 5 feet ofpipe and discharging at the top. This was not asuccess, chiefly because it was not possible to bring •Principal Sanitary Chemist. Baltimore Filtration
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
