Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
California's First aeration plants for corrosion control
The Idyllwild Water District and Pine Cove Water District are small groundwater systems with multiple wells. Both systems have soft, mildly acidic waters with high carbon dioxide content and dissolved inorganic carbon concentrations of approximately 18 mg/L C, and both systems exceeded one or both of the lead and copper action levels in 1993 and 1994. In 1997, aeration was investigated to increase pH and replace inhibitor or other chemical additions. Four designs were evaluated, and a deep bubble aeration system was pilot‐tested. Full‐scale systems were designed and built and became operational in October 1998. Aeration raised the pH from 6.1–6.3 to 7.1–7.6, and by January 1999, both systems easily met both the lead and copper action levels. Radon (Rn) samples taken at Pine Cove showed a 99% reduction to 33 ± 8 pCi/L, assuring compliance with the proposed Rn regulation. Using aeration for corrosion control has considerably simplified treatment and improved water quality in most respects. Treatment was integrated with system designs, enabling the use of one treatment plant for the multiple wells at each system, locating the treatment plants above storage to eliminate repumping, and maximizing electricity savings by increasing operation at off‐peak times.
California's First aeration plants for corrosion control
The Idyllwild Water District and Pine Cove Water District are small groundwater systems with multiple wells. Both systems have soft, mildly acidic waters with high carbon dioxide content and dissolved inorganic carbon concentrations of approximately 18 mg/L C, and both systems exceeded one or both of the lead and copper action levels in 1993 and 1994. In 1997, aeration was investigated to increase pH and replace inhibitor or other chemical additions. Four designs were evaluated, and a deep bubble aeration system was pilot‐tested. Full‐scale systems were designed and built and became operational in October 1998. Aeration raised the pH from 6.1–6.3 to 7.1–7.6, and by January 1999, both systems easily met both the lead and copper action levels. Radon (Rn) samples taken at Pine Cove showed a 99% reduction to 33 ± 8 pCi/L, assuring compliance with the proposed Rn regulation. Using aeration for corrosion control has considerably simplified treatment and improved water quality in most respects. Treatment was integrated with system designs, enabling the use of one treatment plant for the multiple wells at each system, locating the treatment plants above storage to eliminate repumping, and maximizing electricity savings by increasing operation at off‐peak times.
California's First aeration plants for corrosion control
Schock, Michael R. (Autor:in) / Holldber, Jerry (Autor:in) / Lovejoy, Thomas R. (Autor:in) / Lowry, Jerry (Autor:in)
Journal ‐ American Water Works Association ; 94 ; 88-100
01.03.2002
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Regulations , Chemicals , Lead , Copper , Corrosion Control , Aeration , Water Systems , California , Compliance , Water Quality
Using aeration for corrosion control
| Wiley | 1998
California's First Curved Orthotropic Bridge
| British Library Online Contents | 2000
Corrosion control by de-aeration of water
| Engineering Index Backfile | 1937
Reports - California's First Curved Orthotropic Bridge
| Online Contents | 2000
California’s First Major Vehicular Cable-Stayed Bridge
| ASCE | 2022