Because of high population growth and urban planning in Taiwan, the prevalence of public sewage systems reached 30% of the population in 2012, and is expected to increase to 36% by 2014 [1]. Thus, sewage sludge production will increase with the expansion of the sewage treatment system, and should reach up to 1040 t/day by 2014 [2]. Sewage sludge generally contains pollutants such as human pathogenic organisms, and must be disposed of in ways that reduce environmental and public health effects.