. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 128 REPORT OF THE FISH AND GAME COMMISSION. Particular attention lias been paid to pollution by oil and lampblack. The problem confronts the gas companies of devising a rapid and con- tinuous filtering system which will retain all of the lampblack and thus allow the water to return to the bay or stream perfectly clean. The magnitude of this undertaking will be better realized when it is under- stood that an average of twenty-two pound
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 128 REPORT OF THE FISH AND GAME COMMISSION. Particular attention lias been paid to pollution by oil and lampblack. The problem confronts the gas companies of devising a rapid and con- tinuous filtering system which will retain all of the lampblack and thus allow the water to return to the bay or stream perfectly clean. The magnitude of this undertaking will be better realized when it is under- stood that an average of twenty-two pounds of lampblack is produced to each thousand cubic feet of gas, and that San Francisco alone, during the month of January, 1916, manufactured 613,947,000 cubic feet of gas, and about 4000 tons of Fig. 76. Detail view of baffles of the Standard Oil Company plant at Richmond. The oil collects behind the baffles and is skimmed and pumped back into the separator. Photograph by A. M. Fairfield. To meet this situation the Pacific Gas and Electric Company has, in the bay counties alone, spent not less than $100,000 during the last two years. The old system of settling pits, which required a large area to operate successfully, has been finally and definitely abandoned, and attention turned to newer devices. All known filters have been tried with more or less success. Straw filters were found to work very satis- factorily where the lampblack production does not exceed 5000 pounds per day, and a model filter of this type was installed in the Vallejo plant. In the larger plants this filter is too slow and expensive. A straw filter similar to the one at Vallejo, but of less capacity, is under construction at Napa. The three best known types of mechanical filters for handling lamp- black are the Oliver, the Kellev, and the Butters. All of these originally. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
Size: 2141px × 1167px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
