Abstract: A method for pathogen destruction in dilute sewage sludge or other dilute streams containing pathogens, including Helminth ova, while minimizing vapor generation and atmospheric emissions. In addition to conventional waste treatment steps, including grit removal, clarification, and concentration of waste material, vaporized waste treatment compounds are recycled to treat divert untreated waste in a scrubber. In the scrubber, waste material is treated while also acting as a reactive agent to scrub potentially hazardous or noxious gas, particularly gaseous MITC, from the treatment system. Recycling of vaporized treatment compounds provides a reduction of potentially toxic emissions and increased efficiency during treatment.

Abstract: A method for pathogen destruction in dilute sewage sludge or other dilute streams containing pathogens, including Helminth ova, while minimizing vapor generation and atmospheric emissions. In addition to conventional waste treatment steps, including grit removal, clarification, and concentration of waste material, vaporized waste treatment compounds are recycled to treat divert untreated waste in a scrubber. In the scrubber, waste material is treated while also acting as a reactive agent to scrub potentially hazardous or noxious gas, particularly gaseous MITC, from the treatment system. Recycling of vaporized treatment compounds provides a reduction of potentially toxic emissions and increased efficiency during treatment.

Abstract: The present invention describes a process involving a new method of use for methyl isothiocyanate (MITC)-generating compounds in the treatment of organic waste material to reduce vector attraction. The present invention results in waste that is more suitable for use as a fertilizer and meets the standard for vector attraction reduction (VAR) as established by the U.S. Environmental Protection Agency. The method includes the application of MITC generating compounds, such as metam sodium, to organic waste material, resulting in the generation of MITC. The MITC generated by the process of the present invention results in a loss of attraction for organic waste material normally experienced by disease-transmitting pests such as flies and rodents.

Abstract: The present invention describes a process involving a new method of use for methyl isothiocyanate (MITC)-generating compounds in the treatment of organic waste material to reduce vector attraction. The present invention results in waste that is more suitable for use as a fertilizer and meets the standard for vector attraction reduction (VAR) as established by the U.S. Environmental Protection Agency. The method includes the application of MITC generating compounds, such as metam sodium, to organic waste material, resulting in the generation of MITC. The MITC generated by the process of the present invention results in a loss of attraction for organic waste material normally experienced by disease-transmitting pests such as flies and rodents.

Abstract: A process for treating sewage sludge with percent solids less than 20 percent comprises (1) contacting sewage sludge that contains undesirable microorganisms with at least one compound that produces methyl isothiocyanate in water to form a reaction mixture, (2) mixing the reaction mixture, and (3) maintaining the reaction mixture in a closed vessel for at least about two hours. After the reaction mixture is maintained in a closed vessel for the desired time, the closed vessel can be vented to the atmosphere for a time sufficient to dissipate residual methyl isothiocyanate from the reaction mixture.