Microbiological effects of recharging the Magothy Aquifer, Bay Park, New York, with tertiary-treated sewage

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Authors:Ehrlich, G. G.; Ku, H. F. H.; Vecchioli, J.; Ehlke, T. A.
Source:U. S. Geological Survey Professional Paper, No.P 751-E, 18p. Publisher: U. S. Geological Survey, Reston, VA, United States. ISSN: 1044-9612
Publication Date:1980
Note:In English. Deep-well artificial recharge experiments at Bay Park, Long Island, New York
Summary:Injection of highly treated sewage (reclaimed water) into a sand aquifer on Long Island, N.Y., stimulated microbial growth near the well screen. Chlorination of the injectant to 2.5 milligrams per liter suppressed microbial growth to the extent that it did not contribute significantly to head buildup during injection. In the absence of chlorine, microbial growth caused extensive well clogging in a zone immediately adjacent to the well screen. During a resting period of several days between injection and well redevelopment, the inhibitory effect of chlorine dissipated , and microbial growth ensued. The clogging mat at the well-aquifer interface was loosened during this period, probably as a result of microbial activity. Little microbial activity was noted in the aquifer beyond 20 feet from the well screen; it probably resulted from small amounts of biotransformable substances not completely filtered out of the injectant by the aquifer materials. Movement of bacteria from the injection well into the aquifer was not extensive. In one test, in which injected water had substantial total-coliform, fecal-coliform, and fecal-streptococcal densities, no fecal-coliform or fecal-streptococcal bacteria, and only nominal total-coliform bacteria, were found in water from an observation well 20 feet from the point of injection. (Kosco-USGS)
Subjects:Aquifers; Artificial recharge; Cretaceous; Environmental geology; Ground water; Magothy Formation; Mesozoic; Plantae; Pollution; Recharge; Sewage; Surveys; Thallophytes; Upper Cretaceous; USGS; Waste water; Bay Park New York; Long Island; Nassau County New York; New York; United States; Bacteria
Coordinates:N403200 N405500 W0732000 W0735000
Record ID:1980023664
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from USGS product, Selected Water Resources Abstracts, Reston, VA, United States
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