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# Manure &amp; Wastewater Production

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

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## Manure &amp; 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

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

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