Pilot scale evaluation of biological and pressure clarification processes for the removal of high level of iron and manganese
- Fay, Spofford & Thorndike, Inc., Burlington, MA (United States)
- Connecticut Water Company, Clinton, CT (United States)
Iron and manganese originating from groundwater supplies have a long history of causing consumer complaints in water distribution systems. Although iron and manganese are not public health concerns, they are a major concern from an aesthetic standpoint. The elevated awareness of consumers in regard to the quality of drinking water, an increase in regulations requiring additional treatment and the cost associated with developing new sources of supply, has required many utilities to implement improvements to existing facilities. Historical water quality data collected from the Connecticut Water Company`s (CWC) Westbrook Well revealed an increasing trend in iron and manganese concentrations. As a result, the existing greensand filtration facility located at the well, provides insufficient removal rates and inefficient operating cycles. Variations in operating procedures were not successful in correcting these problems. A water treatment feasibility study recommended evaluation of biological and pressure clarification processes to reduce iron (9 mg/l) and manganese (1.5 mg/l) levels below the secondary maximum contaminant levels of 0.30 and 0.05 mg/l, respectively. Assessment of these processes was accomplished through the construction and operation of a 5 gallon per minute (gpm) capacity pilot plant at the Westbrook Water Treatment Plant. Application of biological treatment for iron removal was then piloted on the existing full-scale treatment facility.
- OSTI ID:
- 387297
- Report Number(s):
- CONF-951108-; TRN: 96:003589-0022
- Resource Relation:
- Conference: Water quality technology conference, New Orleans, LA (United States), 12-16 Nov 1995; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings: 1995 water quality technology conference. Part I - Sunday seminars through Session 3E includes poster presentations. Part II - Session 4A through ST7; PB: 2562 p.
- Country of Publication:
- United States
- Language:
- English
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