Topic
Hydraulic retention time
About: Hydraulic retention time is a research topic. Over the lifetime, 6406 publications have been published within this topic receiving 151005 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: The result indicated that a combination anaerobic-aerobic treatment system was effective in removing organic matter from the high-strength pharmaceutical wastewater, and the biodegradability of the wastewater was studied.
Abstract: Anaerobic and aerobic treatment of high-strength pharmaceutical wastewater was evaluated in this study A batch test was performed to study the biodegradability of the wastewater, and the result indicated that a combination anaerobic-aerobic treatment system was effective in removing organic matter from the high-strength pharmaceutical wastewater Based on the batch test, a pilot-scale system composed of an anaerobic baffled reactor followed by a biofilm airlift suspension reactor was designed At a stable operational period, effluent chemical oxygen demand (COD) from the anaerobic baffled reactor ranged from 1,432 to 2,397 mg/L at a hydraulic retention time (HRT) of 125 day, and 979 to 1,749 mg/L at an HRT of 25 day, respectively, when influent COD ranged from 9,736 to 19,862 mg/L As a result, effluent COD of the biofilm airlift suspension reactor varied between 256 and 355 mg/L at HRTs of from 50 to 125 h The antibiotics ampicillin and aureomycin, with influent concentrations of 32 and 10 mg/L, respectively, could be partially degraded in the anaerobic baffled reactor: ampicillin and aureomycin removal efficiencies were 164 and 259% with an HRT of 125 day, and 421 and 313% with HRT of 25 day, respectively Although effective in COD removal, the biofilm airlift suspension reactor did not display significant antibiotic removal, and the removal efficiencies of the two antibiotics were less than 10%
105 citations
TL;DR: The upflow anaerobic sludge blanket reactors seeded with cow dung manure and activated sludge of a dairy wastewater treatment plant (UASBASDIT) were used to treat raw domestic wastewater of medium strength.
105 citations
TL;DR: This study demonstrates microbial electrolysis cell (MEC) scale-up from a 50mL to a 10L cell by optimizing the hydraulic retention time (HRT) and individually controlling the applied voltages of three anodic compartments with a real-time optimization algorithm.
105 citations
TL;DR: To find an appropriate method for sulfate-rich wastewater containing ethanol and acetate with COD/sulfate ratio of 1, a UASB reactor was operated for more than 180 days and indicated that this system removed more than 80% of COD and 30% of sulfate with HRT above 6h and OLR below 12.3 gCOD/L d.
105 citations
TL;DR: Both the annual accumulation of P and increasing outflow concentrations of P in the HSSF CW reflect the possible saturation of filter media with P after 8 years working and the increasing of hydraulic retention time are considered to be key factors that can provide optimal pH for the removal processes.
105 citations