CP-1997-06
A prototype small swine waste treatment system for land limited and tropical application
Yang, P.Y., E. Khan, G. Gan, D. Paquin, and T. Liang.
A prototype of a 300-pig waste treatment system was constructed at the animal research farm of the University of Hawai’i. The system includes a solid/liquid separation unit (12 m3), and one combined rock bed filter and aquatic plant reactor (20 m3). Based on the current results of a 240-pig operation. methane gas production and total solids (TS) reduction are 0.75 m3/m3/day and 72.7%, respectively, at a loading rate of 3.09 kg TS/m3. The aeration unit provides a TCOD and NH3-N reduction of 94% and 91%, respectively. The rock filter achieves a TCOD, NH3-N, and NO3-N reduction of 32.8%, 26.8%, and 68.4%, respectively. The annual cost for each of the treatment components is presented. It is very useful for the aplication of each treatment unit for the various needs of each pig farm.