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Item Information   Holdings       More by this author     Maca, H. William     Subjects     Sewage sludge digestion     Biogas     Integrated solid waste management     Costs and Cost Analysis     Engineering design     MSEV Project.     Browse Catalog     by author:      Maca, H. William       by title:      Engineering design a...         MARC Display

Engineering design and pretreatment facilities for treating brewer's wet grain prior to anaerobic digestion / by H. William Maca. by Maca, H. William Subjects Sewage sludge digestion   Biogas   Integrated solid waste management   Costs and Cost Analysis   Engineering design   MSEV Project. Description:  47 leaves : ill. ; 29 cm. Contents:  Advisor: Dr. Francis Mahuta. Committee members: Paul Boersma, Kenneth Kaszubowski. Introduction -- Literature review -- Materials and methods -- Results and discussion -- Conclusions and recommendations -- References -- Appendix A) 'Calculations'. This project encompasses a conceptual engineering design and associated costs for equipment installation for the physical decomposition of brewer's wet grain prior to anaerobic digestion. A particle size reduction method, using a double-disk attrition mill was chosen, as the core focus of the design. In addition, two wastewater streams that are currently discharging to the municipality, were identified as a potential source for diluting the brewer's wet grain to meet the total solids concentration necessary for anaerobic digestion. Elements of the proposed design include the following, 1) diverter valves on the grain load-out lines, 2) a de-watering press prior to the mills, 3) two double-disk attrition mills for mechanical decomposition, 4) a sump pump and tank to divert the identified wastewater stream, 5) a mixing tank and agitator to mix the miller brewer's wet grain and the diverted wastewater stream and, 6) all associated piping and conveyance systems. Capital costs and operation and maintenance costs were determined for each of the design elements listed above. "Order of Magnitude" costs for both capital and operation and maintenance were calculated. These costs were then combined with costs previously determined for an anaerobic digestor including costs for sludge disposal. A Net Present Value for the project was then calculated and found to be negative. This indicates that the project would not be worth pursuing from a risk-adjusted standpoint. However, if a couple of cost factors, such as the declining price of grain sold as cattle feed and increasing energy prices continue their present trends, it may make the Net Present Value more attractive in a 3-4 year time frame.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .M33 2004 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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