| Summary: | 碩士 === 國立中興大學 === 生物產業機電工程學系所 === 103 === There are about 90 million chicken in Taiwan and produce over 2 700 tons manure each day. The offended odor makes people feel extreme uncomfortable. However, the rich nitrogen in the chicken manure presents high fertilizer application availability. To utilize the chicken manure and will not harm the environment is an important issue in Taiwan. This research is to develop a managing device for chicken manure, including a tunnel type conveying and a heating bucket associated with rotating blades. Using the tunnel type conveying system would reduce the odor mostly. Then using drying bucket to lower moisture content for more dry product, and farmers could apply the dry manure directly.
When drying chicken manure, a proper thickness of manure associated with right temperature would reduce the drying time as well as avoid the loss of nitrogen. 3 cm thickness of manure and 600 C were applied in the closed tunnel area. Closed space cumulates heat and an exhaust fan removes odor. For a 10 000 chicken farm, having 300 kg manure per day, the tunnel conveying system would consume 5 HP = 3 750 W, that is, NT$90/day for the electricity fee, and the moisture content could be reduced to 50 – 60% in 8 hours. Up to this stage, the manure could be packed up into a fermentation bag as a product. When drier product required, the post process would be in the heating bucket and the moisture content would be dropped to 30 – 40% in another 8 hours. The cost for the post process would be about NT$72 per day for the electricity.
The closed tunnel could raise inner temperature up to 100 C and reduce the odor tremendously. Compared to the chicken manure exposed in the open field, the ammonia would be dropped to 2 – 3 ppm using tunnel system in a distance of 3 meters. In addition, the monomethylamine concentration would be reduced from 1 ppm to maximum 10 ppm. The total length of the tunnel system was designed as 15 m, 5 m each for 3 step level conveyors associated with 1 m in width. The space for this tunnel conveyor system would 23 m x 6.2 m x 3.2 m for the width, depth, and height, respectively.
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