Wastewater treatment system including irradiation of primary solids

摘要

The present invention provides a system for treating wastewater in which the majority of solids and biological oxygen demand compounds are separated from the wastewater feed using a primary separation process, to produce a solids phase and a water phase. The solids phase is irradiated to reduce the level of pathogens such that it is safe to use as a soil substitute and/or additive so that the solids can thus be disposed of in an environmentally-friendly manner. In additional embodiments, the solids that have been disinfected by radiation are mixed with a suitable inert filler material to produce a soil substitute, fertilizer, compost, or other soil additive. The liquid phase is treated in a substantially smaller system than would be required for treating the full-strength wastewater that can include a suspended media biological regeneration reactor system. The liquid treatment system can include a high flux adsorbent material treatment system integrated with a low flux adsorbent material biological regeneration reactor.

主权项

1. A system for treatment of wastewater comprising:
a radiation treatment zone including
a source of radiation;an inlet for receiving primary solids,a solids outlet for discharging irradiated primary solids, anda wastewater outlet; a source of fresh or recycled porous adsorbent material, wherein the adsorbent material is characterized by adsorptive capacity for adsorption of biologically refractory compounds and/or biologically inhibitory compounds, and capacity for microorganisms adhered to the adsorbent material, wherein the combined adsorbent material characteristics contribute to biological regeneration of the adsorbent material; a mixing zone including
a wastewater inlet in communication with the wastewater outlet of the radiation treatment zone,an adsorbent material inlet anda discharge outlet; an adsorbent material settling and liquid separation zone including
a slurry inlet in communication with the discharge outlet of the mixing zone,an adsorbent-treated water outlet, anda contaminated adsorbent material outlet; and an adsorbent material biological regeneration reactor system including
a biological regeneration reactor including a contaminated adsorbent material inlet in communication with the contaminated adsorbent material outlet of the adsorbent material settling and liquid separation zone,a biologically treated water outlet, anda regenerated adsorbent material outlet in communication with the adsorbent material inlet of the mixing zone.