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Item Information   Holdings       More by this author     Schwab, Sarah O.     Subjects     Sewage -- Purification -- Biological treatment     Factory and trade waste -- Purification -- Equipment and supplies.     Mercury -- Environmental aspects     MSEV Project.     Browse Catalog     by author:      Schwab, Sarah O.       by title:      An investigation of ...         MARC Display

An investigation of increased mercury recovery from industrial wastewaters by examining the effects of sulfide precipitation versus hydroxide precipitation and the addition of ferric chloride : a report submitted to the faculty of the Milwaukee School of Engineering in partial fulfillment of the requirement for the degree of master of science / Sarah O. Schwab. by Schwab, Sarah O. Subjects Sewage -- Purification -- Biological treatment   Factory and trade waste -- Purification -- Equipment and supplies.   Mercury -- Environmental aspects   MSEV Project. Description:  122 leaves : ill. ; 29 cm. Contents:  Advisor: Dr. Francis Mahuta. Committee members: Dr. Jay Karls, Kenneth Kaszubowski. Introduction -- Literature review -- Experimental materials and methods -- Results and discussion -- Conclusion -- References -- Bibliography -- Appendix A) Envrionmental monitoring and technologies total mercury analytical results: Full scale B) Environmental monitoring and technologies total mercury analytical results: Bench scale C) MAC Systems, Inc. sales quote D) Crane Engineering Sales, Inc. sales quote E) Original mass balance By examining the current wastewater treatment process of increasing pH to enhance settling of particles via hydroxide precipitation, a mercury recovery system can be developed to get better mercury recovery throughout the system. To improve solids settling, the addition of ferric chloride was examined as a flocculent aid and the addition of sodium sulfide was examined as a sulfide precipitation alternative to hydroxide precipitation. The results obtained from bench-scale testing using the parameters of control, ferric chloride addition, sodium sulfide addition, and the addition of both ferric chloride and sodium sulfide suggest that optimal mercury recovery in the treated sludge and negligible mercury recovery in the treated wastewater is best achieved using the addition of ferric chloride alone. A conceptual design with order of magnitude cost estimate is included for the automatic chemical addition of both sodium hydroxide and ferric chloride.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .S385 2005 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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