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: The biodegradation potential of an innovative enclosed tubular biofilm photobioreactor inoculated with a Chlorella sorokiniana strain and an acclimated activated sludge consortium was evaluated under continuous illumination and increasing pretreated swine slurry loading rates.
Abstract: The biodegradation potential of an innovative enclosed tubular biofilm photobioreactor inoculated with a Chlorella sorokiniana strain and an acclimated activated sludge consortium was evaluated under continuous illumi- nation and increasing pretreated (centrifuged) swine slurry loading rates. This photobioreactor configuration provided simultaneous and efficient carbon, nitrogen, and phospho- rous treatment in a single-stage process at sustained nitrogen and phosphorous removals efficiencies ranging from 94% to 100% and 70-90%, respectively. Maximum total organic carbon (TOC), NH4 + , and PO4 3− removal rates of 80±5 g C mr −3 day −1 ,8 9±5 gNm r −3 day −1 , and 13±3 g Pm r −3 day −1 , respectively, were recorded at the highest swine slurry loadings (TOC of 1,247±62 mg L −1 ,N -NH4 + of 656±37 mg L −1 ,P -PO4 3+ of 117±19 mg L −1 , and 7 days of hydraulic retention time). The unusual substrates diffusional pathways established within the phototrophic biofilm (photosynthetic O2 and TOC/NH4 + diffusing from opposite sides of the biofilm) allowed both the occurrence of a simultaneous denitrification/nitrification process at the highest swine slurry loading rate and the protection of microalgae from any potential inhibitory effect mediated by the combination of high pH and high NH3 concentrations. In addition, this biofilm-based photobioreactor supported efficient biomass retention (>92% of the biomass generated during the pretreated swine slurry biodegradation).
140 citations
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TL;DR: In this paper, a moving bed biofilm reactor was used to remove nitrogen from wastewater with a low C/N ratio by simultaneous nitrification and denitrification (SND).
140 citations
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TL;DR: With the improvement of biodegradability by using Fenton pretreatment, also due to the high concentration of biomass and high biofilm activity using the fluidizing bio-carriers, high removal efficiency and stable operation could be achieved in the biological process even at a high COD loading.
139 citations
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TL;DR: In this article, narrow-leave cattails ( Typha augustifolia) were planted at the initial density of 35 rhizomes/m 2, and approximately 50% of the total nitrogen (TN) loaded into the constructed wetlands, operating at the hydraulic retention time (HRT) of 2-10 days, was accounted for by the amount of N assimilation into the plant tissues, resulting in the total kjeldahl nitrogen (TKN) and chemical oxygen demand (COD) removal efficiencies of 40-70% and 71-83%,
139 citations
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TL;DR: In this article, the upflow anaerobic sludge blanket (UASB) was used to degrade phenol in wastewater, and over 97% of phenol was removed at 37°C and pH 6.9-7.5 with 12 h of hydraulic retention time.
139 citations