Abstract
Laboratory and field studies along with inactivation data from the literature are used to model bacteria inactivation during urine storage and struvite production. The model is used to evaluate urine storage and struvite drying under the fluctuating temperature and relative humidity. Recommendations are made to enhance microbial inactivation during urine storage and struvite production in low-resource field settings and to promote the safety of using urine-derived fertilizers.