Test of a chemical dispersant for the control of scale formation at treatment facility D
At the Lawrence Livermore National Laboratory (LLNL), ground water is being treated to remove contaminants such as volatile organic compounds and chromium by several types of processes. At Treatment Facility D, remediation of volatile organics is accomplished by sparging the water with air, and the chromium is removed by an ion- exchange process. The air stripping has the effect of raising the pH of the water from -7 to -8, probably as result of removing carbon dioxide from the water. In the absence of further water treatment, calcium carbonate (CaCO{sub 3}), or calcite, deposits on the downstream equipment as a scale, which causes operational problems. At present, this scale deposition is being controlled by the addition of a polyphosphate formulation (JP-7, Jaeger Products, Inc, Houston, TX), but the use of this chemical is not completely satisfactory because of stringent phosphate discharge limits for the treated water A more benign method of scale control would be highly desirable. Therefore, we evaluated an organic chemical dispersant as a possible alternative.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 292195
- Report Number(s):
- UCRL-ID-130568; ON: DE98058814; BR: EW2010302; CNN: W-7405-Eng-48
- Resource Relation:
- Other Information: PBD: 1 May 1998
- Country of Publication:
- United States
- Language:
- English
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