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Title: Geothermal Waste Treatment Biotechnology: Progress and Advantages to the Utilities

Development of biotechnology for treatment of geothermal residual waste is aimed at the application of low-cost biochemical processes for the surface treatment and disposal of residual geothermal sludges. These processes, in addition to the lowering of disposal cost, are designed to be environmentally acceptable. Recent studies at Brookhaven National Laboratory (BNL) have shown that optimization of several process variables results in fast rates (<24h) of metal removal from residual sludges at acidic pH ({approx}1-2). Optimization of the process variables also enables the removal of radioactive isotopes. In addition, the aqueous phase produced during the bioprocessing which contains solubilized metals can be further treated in a manner which precipitates out the metals and renders the aqueous effluent toxic metal free. In this paper, the various process options will be discussed in terms of biotreatment variables. Chemical composition before and after biotreatment will also be discussed in terms of long-range effects, quality assurance and potential disposal costs.
Authors:
; ;
Publication Date:
OSTI Identifier:
891897
Report Number(s):
CONF-920378--19
TRN: US200622%%543
Resource Type:
Conference
Resource Relation:
Conference: Proceedings, Geothermal Energy and the Utility Market - The Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market; San Francisco, CA, March 24-26, 1992, Geothermal Program Review X
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; AVAILABILITY; BIOTECHNOLOGY; BNL; CHEMICAL COMPOSITION; GEOTHERMAL ENERGY; MARKET; OPTIMIZATION; QUALITY ASSURANCE; REMOVAL; SLUDGES; SURFACE TREATMENTS; WASTE PROCESSING; WASTES Geothermal Legacy