Environmental Engineering Group, Department of Chemical Engineering, University of Pretoria, Pretoria 0002, South Africa E-mail:
Water Sci Technol. 2014;69(7):1419-25. doi: 10.2166/wst.2014.012.
Five groups of broiler chickens were raised on feed containing varying substitutions of single cell protein from preprocessed waste activated sludge (pWAS) in varying compositions of 0:100, 25:75, 50:50, 75:25, and 100:0 pWAS: fishmeal by mass. Forty chickens per batch were evaluated for growth rate, mortality rate, and feed conversion efficiency (ηє). The initial mass gain rate, mortality rate, initial and operational cost analyses showed that protein from pWAS could successfully replace the commercial feed supplements with a significant cost saving without adversely affecting the health of the birds. The chickens raised on preprocessed WAS weighed 19% more than those raised on fishmeal protein supplement over a 45 day test period. Growing chickens on pWAS translated into a 46% cost saving due to the fast growth rate and minimal death losses before maturity.
将预处理后的废活性污泥（pWAS）中的单细胞蛋白替代物以 0:100、25:75、50:50、75:25 和 100:0 pWAS: 鱼粉质量比的比例添加到饲料中，饲养了五组肉鸡。每批 40 只鸡用于评估生长率、死亡率和饲料转化率（ηє）。初始质量增长率、死亡率、初始和运营成本分析表明，来自 pWAS 的蛋白质可以成功替代商业饲料补充剂，从而显著节省成本，而不会对鸟类的健康产生不利影响。在 45 天的测试期内，用预处理的 WAS 饲养的鸡比用鱼粉蛋白质补充剂饲养的鸡重 19%。由于快速生长和成熟前最小的死亡损失，用 pWAS 饲养肉鸡可节省 46%的成本。
