Container-type apparatus with a suspended particle system for wastewater treatment

A container-type apparatus for wastewater treatment with a suspended particle system, comprising:

• two or more interconnected facultative biological reaction zones, said two or more facultative biological reaction zones including any one or combination of at least one anaerobic zone, at least one of an anoxic zone and aerobic zone, and at least one of said facultative biological reaction zones including a suspended particle system comprised of any one or combination of light particles and heavy particles, said any one or combination of light particles and heavy particles having microorganisms located on surfaces thereof, a density of said light particles being lower than a density of the wastewater, a density of said heavy particles being higher than the density of said wastewater;
• and
• a gas injection mechanism for injecting gas into enclosures containing said suspended particle system, said gas injection mechanism being located near a bottom of said enclosures to inject gas upwardly into said liquid phase containing said any one or combination of light particles and heavy particles, and wherein by injecting gas from near the bottom light particles move downward while heavy particles move upward and such that both light and heavy particles are suspended in the liquid, and wherein said gas injection mechanism is configured so that the gas phase flows upwardly in said enclosures continuously or intermittently.