TAILIEUCHUNG - Dairy Waste Anaerobic Digestion Handbook

It is accepted globally that a “leaner” yet ‘bigger’ dairy industry is much more productive than small farm holdings. Contrary to this belief we suggest mechanization is not an alternative but can be a complement to smallholding farms. Mechanization is understood as loss of jobs for farmers. This may be true for the crop sector; however, in dairy farming this is not always the case. Given Pakistan’s spread of smallholdings and very low level of existing mechanization; job losses are unlikely to happen. Empirically, any job loss phase comes only after a degree of mechanization has been reached | Dairy Waste Anaerobic Digestion Handbook Options for Recovering Beneficial Products From Dairy Manure Dennis A. Burke . June 2001 Environmental Energy Company 6007 Hill Street Olympia WA 98516 1 Environmental Energy Company 360-923-2000 Table Of Contents Anaerobic Digestion Dairy Waste Dairy Housing Free Stall Milk Open Transport Flush Scrape Front end Vacuum Manure Holding Tanks and Chopper Primary Gravity Primary Holding Secondary Holding Anaerobic Bacterial Factors Controlling the Conversion of Waste to Waste Dilution of Foreign Toxic i Environmental Energy Company 360-923-2000 Hydraulic Retention Time HRT .21 Solids Retention Time SRT .21 Digester Loading kg m3 d .23 Food to Microorganism End Product Digester Processes that are not Appropriate for Digesting Dairy Processes that can be used for Digesting Dairy Anaerobic Lagoons Very Low Rate .27 Completely Mixed Digesters Low Rate .28 Plug Flow Digesters Low Rate .30 Contact Digesters High Rate .31 Sequencing Batch Reactors High Rate .32 Contact Stabilization Reactors High Rate .32 Phased Hybrid Qualitative Analysis of Anaerobic Solids Concentration Digestion of the Entire Waste Foreign Material Odor Stability Flexibility and Nutrient Concentration and Additional Substrate Energy Conventional High Rate Anaerobic Cost of Anaerobic Processes for Dairy Alternative Waste Management Existing Manure .

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