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It has been almost 30 years since the start of test research on the UASB (Upflow Anaerobic Sludge Blanket) method in the 1980s. During this period, various systems, including a super high load type of EGSB (Expanded Granular Sludge Bed), have been developed, and it is said that UASB processes currently account for approximately 60% of all anaerobic wastewater treatment systems worldwide. With five models of UASB-based systems: “Biobed®”, “Biothane®”, “AquaSAT®”, “Biobed®-U” and “Biothane®-U” Sumitomo Heavy Industries Environment Co., Ltd. (SHI|EV) is capable of offering the optimum model according to the concentration and quantity of wastewater discharged from the plant, ranging from 200 mg/L to over 10000 mg/L in BOD concentration and from a few m3/d to over 15000 m3/d in wastewater. This report describes an overview of SHI|EV's UASB processes, including the peripheral technology developments.
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