Biological TreatmentIndustrialMunicipal

Compatible Aeration System

A long-retention aeration process that pairs with any primary treatment stage, adjusting dissolved oxygen automatically for peak loads.

Hydraulic retention> 22 hrs

Sludge age~ 5 days

vs. conventional HRT6–16 hrs

Process Diagram

Capacity rangeModular tank design scales from small package plants of a few dozen m³/day to large multi-train municipal or industrial systems handling thousands of m³/day.

Influent / effluent conditionsAccepts pre-settled municipal or industrial wastewater across a wide range of organic loading; produces a low-BOD, well-nitrified effluent suitable for discharge or further polishing.

FootprintLarger tankage than a sequencing batch system for equivalent capacity, a consequence of the extended hydraulic retention time, but that same retention gives it more tolerance for load swings without a separate clarifier redesign.

Operating requirementsContinuous aeration via blowers and diffusers with automatic dissolved-oxygen control, periodic sludge wasting, and comparatively low day-to-day operator intervention.

InstallationsCommon as the biological stage on industrial and municipal sites where influent load fluctuates significantly through the day.

Technical Data SheetDownload (coming soon)