Cady Inc

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A report based on Engineered Storage Products Company's 25 years of digester tank design and installation coordination. Livestock producers are seeking new ways to deal with manure from their operations in a safe, efficient and sustainable way. Among the options being considered is the use of an anaerobic digester. An anaerobic digester is a completely closed (oxygen free) system that receives and biologically treats manure with naturally occurring organisms. A successful system should be easy to operate, cost effective and characterized by consistent and significant reduction in volatile solids, production of methane rich biogas, and discharge an effluent with less odor, pathogenic organisms and weed seeds than was present in the incoming waste. In a successful system, no additives or additional organisms are required. Biogas production is best suited for farms that handle large amounts of manure as a liquid, slurry, or semi-solid with little or no bedding added. Biogas systems require a financial investment and management responsibility. The system must be designed by an experienced consultant, who is well versed with the requirements associated with biogas production. A typical digester system will have a retention time of 20 days. To size a digester, take the daily manure production in your operation and multiply by 20. Research has shown that an above ground mixed reactor similar to tanks designed by Engineered Storage Products Company (ESPC), is going to be more efficient than a plug flow system. Listed at left are expected production values. The selection of an engineering consultant or developer is a critical decision. The farm owner often relies on the consultant or developer to manage the process of transforming a feasible idea into a functional facility. In addition to a consultant that designs the digester system, the owner may need to team with other equipment vendors. Have your engineering consultant call your local authorized ESPC dealer today for a price quotation for a digester tank. The largest component of a digester system is the digester tank. ESPC has been manufacturing and installing glass fused to steel structures since 1949. They have been designing tanks used in digester systems for more than 25 years. Most ESPC dealers can also supply reception pit pumps, manure storage structures, manure spreader tanks, and solids separators. An Engineered Storage Products dealer can also complete the installation of many of the digester components. With these partners in mind, a farm owner can determine his or her desired role in the project development process.

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