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Trihalomethane Formation Downstream of Spray Aerators Treating Disinfected Groundwater
Total trihalomethane (TTHM) formation was evaluated in disinfected groundwater that had been treated using spray aeration. A bench‐scale air‐stripping test apparatus was operated using two alternative spray nozzle configurations: a bench‐scale (BS) spray head and an off‐the‐shelf (OTS) spray nozzle. Finished chlorinated water samples were collected from two Florida groundwater supplies. The Babson Park water treatment plant (BPWTP) contained bromide at below detection levels of <0.025 mg/L; the Oviedo Mitchell‐Hammock water treatment plant (OWTP) contained ~0.17 mg/L bromide. Chlorine residuals were maintained downstream of spray aeration treatment at 1.0 mg/L with no apparent loss from aeration. The BS spray nozzle resulted in TTHM removals of 45.2 ± 3.3% for the BPWTP and 37.7 ± 3.1% for the OWTP. The OTS spray nozzle removed 54.7 ± 3.9% and 48.1 ± 6.6% of TTHMs for BPWTP and OWTP, respectively. Lower percent removals in the OWTP were attributed to bromide and subsequent formation of brominated TTHMs in the supply.
Trihalomethane Formation Downstream of Spray Aerators Treating Disinfected Groundwater
Total trihalomethane (TTHM) formation was evaluated in disinfected groundwater that had been treated using spray aeration. A bench‐scale air‐stripping test apparatus was operated using two alternative spray nozzle configurations: a bench‐scale (BS) spray head and an off‐the‐shelf (OTS) spray nozzle. Finished chlorinated water samples were collected from two Florida groundwater supplies. The Babson Park water treatment plant (BPWTP) contained bromide at below detection levels of <0.025 mg/L; the Oviedo Mitchell‐Hammock water treatment plant (OWTP) contained ~0.17 mg/L bromide. Chlorine residuals were maintained downstream of spray aeration treatment at 1.0 mg/L with no apparent loss from aeration. The BS spray nozzle resulted in TTHM removals of 45.2 ± 3.3% for the BPWTP and 37.7 ± 3.1% for the OWTP. The OTS spray nozzle removed 54.7 ± 3.9% and 48.1 ± 6.6% of TTHMs for BPWTP and OWTP, respectively. Lower percent removals in the OWTP were attributed to bromide and subsequent formation of brominated TTHMs in the supply.
Trihalomethane Formation Downstream of Spray Aerators Treating Disinfected Groundwater
Duranceau, Steven J. (author) / Smith, C. Tyler (author)
Journal ‐ American Water Works Association ; 108 ; E99-E108
2016-02-01
10 pages
Article (Journal)
Electronic Resource
English
Trihalomethanes , spray aeration , Bromide , Chlorine , nozzle , total trihalomethane , Spray Aeration , chlorine , Florida , bromide , Groundwater , Disinfection , disinfection
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