Completed worksheet for Design example 102

Worksheet 10A-1—Waste storage structure capacity design

Decisionmaker: Ralph Kilpatrick

Date: 6/13/91

Site: Hoot Ridge, KY

Animal units

1. Animal type Mikers Heifer

3. Number of animals (N)

4. Animal units, AU = WLLxLLNL = i000

Manure volume

5. Daily volume of daily manure production per AU, ft3/AU/day (DVM)= 1.30 1.30

7. Total volume of manure production for animal type for storage period, ft3 VMD = AU x DVM x D = .

16,380 6,084

8. Total manure production for storage period, ft3 (TVM) 22,464

Wastewater volume

9. Daily wastewater volume per

10. Total wastewater volume for animal description for storage period, ft3 WWD = DWW x AU x D = -

11. Total wastewater volume for storage period, ft3 (TWW)

Bedding volume

12. Amount of bedding used daily for animal type, 3 1 lbs/AU/day (WB) = -

14. Bedding volume for animal type for storage period, ft3 (BV) =


15. Total bedding volume for storage period, ft3 (TBV) =

Waste volume requirement




Waste stacking structure sizing

17. Structure length, ft L =


882 (USE90)

19. Structure height, ft H =


Notes for waste stacking structure:

1. The volume determined (WV) does not include any volume for freeboard. It is recommended that a minimum of 1 foot of freeboard be provided for a waste stacking structure.

2. The equations for L, WI, and H assume manure is stacked to average height equal to the sldewall height. Available storage volume must be adjusted to account for these types of variations.

Tank sizing

Total height (or depth) of tank desired, ft (H)-------

Less precipitation for storage period, ft.____-

(uncovered tanks only)

Less depth allowance for accumulated solids, ft -

(0.5 ft. minimum) Less depth for freeboard (0.5 ft. recommended), ft -

Effective depth, ft (EH) = 21. Surface area required, ft2

22. Rectangular tank dimensions Total height, ft (H) =

Selected width, ft (WI)=

23. Circular tank dimensions Total height, ft H =

Notes for waste storage tank structure:

1. Final dimensions may be rounded up to whole numbers or to use increments on standard drawings.

2. Trial and error may be required to estabiish appropriate dimensions.

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