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.
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TL;DR: In this article, the hydraulic characteristic of an anaerobic rotating biological contactor (AnRBC) was studied by changing two important hydraulic factors effective in the treatment performance: the hydraulic retention time (τ) and rotational disk velocity (ω).
Abstract: The hydraulic characteristic of an anaerobic rotating biological contactor (AnRBC) were studied by changing two important hydraulic factors effective in the treatment performance: the hydraulic retention time (τ) and rotational disk velocity (ω). The reactor hydraulic performance was analyzed by studying hydraulic residence time distributions (RTD) obtained from tracer (Rhodamine B) experiments. The experiments were conducted based on a central composite face-centered design (CCFD) and analyzed using response surface methodology (RSM). The region of exploration for the process was taken as the area enclosed by τ (60, 90 and 120 min) and ω (0.8 and 16 rpm) boundaries. Four dependent parameters, deviation from ideal retention time (Δτ), dead volume percentage and dispersion indexes (Morrill dispersion index (MDI) and dispersion number (d)), were computed as response. The maximum modeled Δτ and dead volume percentage was 43.03 min and 37.51% at τ and ω 120 min and 0 rpm, respectively. While, the minimum predicted responses (2.57 min and 8.08%) were obtained at τ and ω 60min and 16 rpm, respectively. The interaction showed that disk rotational velocity and hydraulic retention time played an important role in MDI in the reactor. The AnRBC hydraulic regime was classified as moderate and high dispersion (d=0.09 to 0.253). As a result, in addition to the factors studied, the reactor geometry showed significant effect on the hydraulic regime.
53 citations
TL;DR: The granules maintained a good settling ability and a dominant granular morphology as evidenced by the low sludge volume index (SVI) value and large granule size during the long-term operation (420 days).
53 citations
TL;DR: The present integration of heterotrophic bacteria production in RAS represents an innovative option to reduce waste discharge by conversion and increase the system's ecological sustainability increases.
53 citations
TL;DR: One isolate recovered from the biofilm was shown to be capable of degrading 4-CP as a sole carbon and energy source.
Abstract: Using a continuous enrichment technique, a bacterial consortium capable of degrading 4-chlorophenol (4-CP) was obtained from the rhizosphere of Phragmites australis A granular activated carbon (GAC) biofilm reactor was established using this consortium, and the degradation of 4-CP was investigated under continuous flow operation using a feed of 20-50 mg l(-1) with a hydraulic residence time of 17 min over a 6-month period Chloride liberation occurred throughout the operation, and the reactor had 4-CP removal efficiencies of 69-100% Periods of lower performance were attributed to clogging of the column with biomass and the formation of channels Subsequently, the immobilized biofilm was subjected to a starvation period of 5 months, after which its degradative capacity was still maintained The microbial consortium was characterized during the continuous flow experiment and dynamic population changes were observed throughout One isolate recovered from the biofilm was shown to be capable of degrading 4-CP as a sole carbon and energy source
53 citations
TL;DR: A new process of an up-flow bio-electrocatalyzed electrolysis reactor (UBER) connected with an aerobic bio-contact oxidation reactor (ABOR) was developed for treating azo dye wastewater as mentioned in this paper.
53 citations