“…This is achieved by the treatment of sludge using effective processes to reduce or eliminate the pathogen content, supplemented by cropping and harvesting restrictions preventing use on crops that are in contact with the soil and may be consumed without cooking, and to permit the natural attenuation of pathogens in the soil (USEPA, 1994;DoE UK, 1996;ADAS, 2001;NRMMC, 2004;EPA Victoria, 2004;WHO, 2006). We have observed substantial decay of pathogen indicators during solar drying treatment of sludge, in line with regulation limits for applying sludge in Australia (Rouch et al, 2011b). Ascaris lumbricoides is an important human pathogen, which infects over a billion people worldwide, with most infections occurring in developing countries (Crompton, 2001;Bethony et al, 2006).…”