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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
Manure & WastewaterProduction

Prepared by J.E. Andrews, PE, NRCS - Lakewood, CO

Colorado CNMP Workshop

objectives
OBJECTIVES

To estimate the yearly production of:

  • Manure & Other Solid Wastes
  • Process Wastewater
  • Nitrogen & Phosphorus

Colorado CNMP Workshop

information needed
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

example calculation
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

step 1 calculate average weight
Step 1 - Calculate Average weight

* Enter in column (c) of Worksheet 1

Colorado CNMP Workshop

step 2 calculate animal units
Step 2 - Calculate # Animal Units

* Enter in column (d) of Worksheet 1.

Colorado CNMP Workshop

step 3 get manure production rate
Step 3 - Get Manure Production Rate

* Enter 8.7 LB. / day -AU in column (e) of Worksheet 1.

Colorado CNMP Workshop

step 4 calculate daily manure production
Step 4 - Calculate Daily Manure Production

# AUs x Production Rate = LB.s Manure / Day

* Enter in column (g) of Worksheet 1.

Colorado CNMP Workshop

step 5 calculate annual manure production
Step 5 - Calculate Annual Manure Production

* Enter in column (h) of Worksheet 1.

Colorado CNMP Workshop

step 6 get manure analysis
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

step 7 calculate available nutrients
Step 7 - Calculate Available Nutrients

* Enter in column (k) of Worksheet 1

** Enter in column (l) of Worksheet 1

Colorado CNMP Workshop

example calculation19
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

example calculation21
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