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, two central composite rotatable design (CCRD) were applied aiming at investigating the effects of current density (CD) and hydraulic retention time (HRT), where different times were evaluated for the aluminum electrode (31.8-88.2
56 citations
TL;DR: Investigation of the continuous production of 1,3-PDO with immobilized cells using raw glycerol without purification obtained from a biodiesel production process revealed that HRT is an important factor for both immobilized and suspended systems and a HRT of 2 h is the best one in terms of volumetric production rate.
Abstract: The continuous production of 1,3-propanediol (1,3-PDO) was investigated with Clostridium beijerinckii NRRL B-593 using raw glycerol without purification obtained from a biodiesel production process. Ceramic rings and pumice stones were used for cell immobilization in a packed-bed bioreactor. For comparison purpose, a control bioreactor with suspended culture was also run. The effect of hydraulic retention time (HRT) on the production of 1,3-PDO in both immobilized and suspended bioreactors were also investigated. The study revealed that HRT is an important factor for both immobilized and suspended systems and a HRT of 2 h is the best one in terms of volumetric production rate (g 1,3-PDO/L/h). Furthermore, cell immobilization had also obvious benefits especially for the robustness and the reliability of the production. The results indicated that cell immobilization achieved a 2.5-fold higher productivity in comparison to suspended cell system. Based on our results, continuous production of 1,3-PDO with immobilized cells is an efficient method, and raw glycerol can be utilized without any pretreatment.
56 citations
TL;DR: In this paper, the results of a research involving bench and pilot scale experiments related to primary sludge hydrolysis were presented, and the conclusions drawn were that a soluble COD production of the order of 5-6% in terms of sludge TCOD can be expected in a batch fermentor operating with HRT≅2days at T≤ 20°C, b) in a continuous flow fermentor, combinations of T>20°C and SRT>2 should be applied in order to achieve a production of 10%, c) significant soluble carbon production
56 citations
TL;DR: The results suggest the possibility that additives may facilitate higher OLRs in monodigestion of pig slaughterhouse waste.
56 citations
TL;DR: In this paper, the effect of hydraulic retention time (HRT) on anaerobic membrane bioreactor (AnMBR) performance, biopolymeric substances production and fouling; also, struvite precipitation is analyzed based on solubility product equation.
56 citations