Search results for "organic loading rate"

showing 3 items of 3 documents

Aerobic granular sludge treating anaerobically pretreated brewery wastewater at different loading rates.

2020

Abstract In this study, three different aerobic granular sludge (AGS) reactors fed with anaerobically pre-treated brewery wastewater were studied. The AGS reactors were operated under different conditions including organic loading rates (OLR) between 0.8 and 4.1 kg COD m−3 d−1, C:N:P ratios (100:10:1 and 100:6:1) and food to microorganism ratios (F/M) between 0.8 ± 0.6 and 1.2 ± 0.5 and 0.9 ± 0.3 kg-TCOD kg-VSS−1d−1. Stable granulation was achieved within two weeks and the size of the granules increased according to the OLR applied. The results indicated that low C:N:P and F/M ratios were favorable to achieve stable aerobic granules in the long term. The carbon removal rate was load-indepen…

Environmental EngineeringMicroorganismchemistry.chemical_element02 engineering and technology010501 environmental sciencesWastewater01 natural sciencesFood to microorganism ratioWaste Disposal FluidGranulationBrewery wastewaterNutrientAnimal scienceBioreactors020401 chemical engineeringNutrient removal0204 chemical engineering0105 earth and related environmental sciencesWater Science and TechnologySettore ICAR/03 - Ingegneria Sanitaria-AmbientaleSewageChemistryMicrobiotaPerformance resultsAerobiosisWastewaterMicrobial population biologyAerobic granular sludgeAerationCarbonOrganic loading rateWater science and technology : a journal of the International Association on Water Pollution Research
researchProduct

Integrated production of biopolymers with industrial wastewater treatment: Effects of OLR on process yields, biopolymers characteristics and mixed mi…

2022

The production of polyhydroxyalkanoates (PHA) using industrial wastewaters as feedstocks is a current and challenging topic. This study investigated the production of biopolymers by a mixed microbial culture under different OLRs equal to 1 kgCOD m-3d-1 (Period 1), 2 kgCOD m-3d-1 (Period 2) and 3 kgCOD m-3d-1 (Period 3). The maximum PHA content was achieved in Period 2 (0.38 gPHA gTSS-1), whereas lower values were obtained in Period 1 (0.13 gPHA gTSS-1) and Period 3 (0.26 gPHA gTSS-1). Overall, the maximum PHA productivity resulted equal to 0.08 gPHA L-1h-1 (P2), 0.05 gPHA L-1h-1 (P1) and 0.04 gPHA L-1h-1 (P3), respectively. The molecular weight of the PHA increased from Period 1 (250 kDa) t…

Settore ICAR/03 - Ingegneria Sanitaria-AmbientaleProcess Chemistry and TechnologyIndustrial wastewater Mixed microbial cultures Organic loading rate Polyhydroxybutyrate SBR reactorsSafety Risk Reliability and QualityWaste Management and DisposalBiotechnologyJournal of Water Process Engineering
researchProduct

Anaerobic dynamic membrane bioreactors for high strength wastewater treatment

2013

A laboratory scale external anaerobic dynamic membrane bioreactor (AnDMBR) treating high strength wastewater was operated to assess the effect of gas sparging velocity and organic loading rate on removal efficiency and dynamic membrane (DM) filtration characteristics. An increase in gas sparging velocity (GSV) results in a decrease in DM filtration resistance. DM or cake formation was identified as the main contribution to the total filtration resistance. Over 99% COD removal was obtained in the study regardless of the GSV. The results showed that the DM formation process proceeded until a stable cake layer thickness was reached. An effective pollutant removal and high permeate quality was …

dynamic membraneorganic loading ratewastewate treatmentanaerobic membrane bioreactorbiogas spargingfeasibility
researchProduct