A system and methods comprising a greenhouse for predrying a biosolids to reduce volume and weight； a conveyer belt operably connected to the greenhouse for conveying the biosolids from the greenhouse to a pasteurization system； the pasteurization system comprising a burner-fan to introduce hot air to the biosolids； the pasteurization system comprising a heat up belt to accept the biosolids from the greenhouse and a burner-fan for raising the biosolids temperature from ambient to at least 70° C.； the pasteurization system further comprising a pasteurization belt to hold the biosolids at 70° C. for at least thirty minutes； a biofilter system operably connected with the greenhouse and the pasteurization system for reducing odors； and bagging area to collect a final product.
