The Gate 5 System is
Scalable, Sustainable, & Economical
Feedstock for the Gate 5 System is initially screened and dewatered to at least 15% solids content (ideally to 25% or more) using mechanical (typically a belt-press, screw press, or centrifuge) or advanced membrane technologies and then dried and pulverized to become a powdered biofuel and clean water.
The biofuel is then combusted using a powdered fuel burner in a biomass boiler to produce heat that is used for drying the feedstock. It could also be used to run a turbine, which can generate renewable electricity for the Gate 5 System’s parasitic load and surplus electrical and thermal energy that can be available for a customer’s use or sale to the grid. In the combustion step, all living and chemical organics are destroyed, so it is not necessary to process the sludge to biosolids. The post-combustion air is cooled and cleaned before it is released into the environment.
“Gate 5’s transformative resource recovery process can change the world by turning sewage sludge and other organic wastes (such as food waste and animal waste) into safe, sustainable, and usable products.”
The easily scalable Gate 5 System has a small footprint, and its smallest self-powered units can process 4 to 6 wet tons a day (WTPD) of biosolids or 2.5 to 3 WTPD of primary sludge/waste activated sludge (WAS). The System can either be trailer-mounted or permanently located at a wastewater treatment plant (WWTP) or resource recovery facility.
The Gate 5 System can be designed to run seven days a week for 24 hours a day or in shifts, which allows for operational flexibility. The process is adaptable for primary sludge (with and without WAS), anaerobically digested biosolids, residuals from dairies, feedlots, agri-business operations, food processing centers, and food waste (alone or in combination) as long as the average latent energy content is at least 5,000 BTU/dry lb. with less than 15% inorganic material in the feedstock.
A WWTP or resource recovery facility running a Gate 5 System on primary sludge,
WAS, or food waste would not need to produce biosolids or use anaerobic
digestate, which could provide the host facility with an economically desirable alternative to rehabilitation or expansion of their anaerobic digesters and other solids handling processes.