A microbial agent effectively reduces ammonia volatilization and ensures good maggot yield from pig manure composted via housefly larvae cultivation

Ammonia volatilization is a serious concern in the two-stage composting of pig manure. To reduce ammonia volatilization, an optimal microbial agent concentration for maintaining nitrogen in compost was determined. The microbial agent had a negative effect on housefly larval growth, but all treatments achieved good yields of late-instar maggots above 12% fresh material weight. The volatilization of ammonia was efficiently reduced by directly...