
Keywords: HRT، زمان هیدرولیکی; UASB, up flow anaerobic sludge blanket; GSS, gas-solid separator; HRT, hydraulic retention time; SRT, sludge retention time; WWTP, wastewater treatment plant; OLR, organic loading rateAnaerobic wastewater treatment; Anaerobic fluidized bed reactors; Bioga