Swine Manure Solids Concrete Settling Basin Design

Published by: North Carolina Cooperative Extension Service

Publication Number: EBAE 183-93

Last Electronic Revision: March 1996 (JWM)

Average animal live weight at full capacity             =     354,250 lbs
     (250-sow farrow-to-finish unit)

Total fresh manure production:
     354,250 lbs   x   83.4 lbs/day/1000 lbs            =     29,547 lbs/day

Total manure solids production:
     29,547 lbs/day  x  0.12 lbs TS/lb manure           =     3,680 lbs/day

Total settleable manure solids:
     3,680 lbs/day   x   0.50 lbs SettS/lb TS           =     1,840 lbs/day

Settleable solids volume:
     1,840 lbs/day    x    1 ft3/50 lbs                 =     36.8 ft3/day

30-day settled solids storage volume:
     36.8 ft3/day    x    30 days                       =     1,104 ft3

Largest flush tank capacity (finishing floor):
     16 ft  x  192 ft  x  1 hd/8 ft2  x  220 lbs/hd
        x  1.5 gals/100 lbs  x  1 ft3/7.48 gals         =     169 ft3

Total effective basin liquid/solids storage:
     1,104 ft3    +    169 ft3                          =     1,273 ft3

Suggested basin dimensions:
     Total depth                                        =     3.0 ft
     Effective liquid depth                             =     2.5 ft
     Entrance ramp slope                                =     8:1
     Inside dimensions (including ramp)                 =     20 ft  x  40 ft

Figures not included

Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.

EBAE 183-93

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