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Manure & Wastewater Production

Manure & Wastewater Production. Prepared by J.E. Andrews, PE, NRCS - Lakewood, CO. OBJECTIVES. To estimate the yearly production of: Manure & Other Solid Wastes Process Wastewater Nitrogen & Phosphorus. Information Needed. Livestock Information Type Number Average Weight

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Manure & Wastewater Production

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  1. Manure & WastewaterProduction Prepared by J.E. Andrews, PE, NRCS - Lakewood, CO Colorado CNMP Workshop

  2. OBJECTIVES To estimate the yearly production of: • Manure & Other Solid Wastes • Process Wastewater • Nitrogen & Phosphorus Colorado CNMP Workshop

  3. Information Needed • Livestock Information • Type • Number • Average Weight • Confinement Period • Wastewater, bedding & other waste volumes • Worksheet #1 a&b • Tables 2, 3 & 4 Colorado CNMP Workshop

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  9. Example Calculation Frank’s Feedlot • 2,500 Head Beef • Entry weight ~ 500 LB. • Exit weight ~ 1,200 LB. • On site 365 days per year • Grain Diet Colorado CNMP Workshop

  10. Step 1 - Calculate Average weight * Enter in column (c) of Worksheet 1 Colorado CNMP Workshop

  11. Step 2 - Calculate # Animal Units * Enter in column (d) of Worksheet 1. Colorado CNMP Workshop

  12. Step 3 - Get Manure Production Rate * Enter 8.7 LB. / day -AU in column (e) of Worksheet 1. Colorado CNMP Workshop

  13. Step 4 - Calculate Daily Manure Production # AUs x Production Rate = LB.s Manure / Day * Enter in column (g) of Worksheet 1. Colorado CNMP Workshop

  14. Step 5 - Calculate Annual Manure Production * Enter in column (h) of Worksheet 1. Colorado CNMP Workshop

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  16. Step 6 - Get Manure Analysis * Enter 23 LB.-N / ton in column (i) of Worksheet 1 ** Enter 24 LB.-P2O5 / ton in column (j) of Worksheet 1 Colorado CNMP Workshop

  17. Step 7 - Calculate Available Nutrients * Enter in column (k) of Worksheet 1 ** Enter in column (l) of Worksheet 1 Colorado CNMP Workshop

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  19. Example Calculation Frank’s Dairy • 300 Head Milk Cows @ 1,350 LB.s • 90 Head Dry Cows @ 1,350 LB.s • 40 Replacement Heifers @ 900 LB.s • 2,000 gal. Wash water per day • 200 LB.s hay bedding, 90 days per year Colorado CNMP Workshop

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  21. Example Calculation Frank’s Feeder Pigs • 2,400 finishers • Entry weight ~ 40 LB. • Exit weight ~ 260 LB. • On site 365 days per year • 3,000 gal day flushing water into earthen storage pond Colorado CNMP Workshop

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