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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01 Jan 2006
TL;DR: The most important operational factors for successful wastewater treatment with microalgae are depth, turbulence and hydraulic retention time.
Abstract: Microalgae can be used for tertiary treatment of wastewater due to their capacity to assimilate nutrients. The pH increase which is mediated by the growing algae also induces phosphorus precipitation and ammonia strip ping to the air, and may in addition act disinfecting on the wastewater. Domestic wastewater is ideal for algal growth since it contains high concentrations of all necessary nutrients. The growth limiting factor is rather light, especially at higher latitudes. The most important operational factors for successful wastewater treatment with microalgae are depth, turbulence and hydraulic retention time.
120 citations
TL;DR: In this article, the authors investigated the biogas production from a slurry obtained by mixing finely ground olive pomace in water using anaerobic digesters of 1-l working volume at 37°C.
Abstract: Biogas production from a slurry obtained by mixing finely ground olive pomace in water was investigated using anaerobic digesters of 1-l working volume at 37°C. A start-up culture was obtained from a local landfill area and was adopted to the slurry within 10 days at this temperature. The biogas generation rates were determined by varying the total solids (TS) concentration in the slurry and the hydraulic retention time (HRT) during semi-continuous digestion. The maximum rate was found to be 0.70 l of biogas per l of digester volume per day, corresponding to a HRT of 20 days and 10% TS with a yield of 0.08 l biogas per g chemical oxygen demand (COD) added to the digester. The methane content of the biogas was in the range of 75–80% for both batch and semi-continuous runs, the remainder being principally carbon dioxide.
119 citations
TL;DR: The filterability results showed that the anaerobic effluent was characterised by a slightly better filterability efficiency than the aerobic effluent, and increasing FVW proportions in the feedstock significantly improved the biogas production yield.
119 citations
TL;DR: In this paper, the authors focused on several physico-chemical and biological treatment methods that may affect the reduction of the organic load in olive mill wastewater (OMW) using sand filtration and subsequent treatment with powdered activated carbon in a batch system.
119 citations
TL;DR: Autotrophic denitrification was studied in laboratory columns packed with granular elemental sulfur only and operated in an upflow mode, extremely simple, stable and easy to maintain.
119 citations