Fixed Bed Water Treatment Articles
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What are Bioreactors?
Bioreactors are vessels in which raw materials are converted to product by the action of living organisms. A bioreactor provides the optimal environment for cells and microorganisms to grow by maintaining pH, temperature, gas, and nutrient supply. What is the Difference Between a Bioreactor and Fermentor? The word ‘Bioreactor’ is often used as a blanket term. However, when the process ...
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Trickling filter design guideline – How do trickling filters work?
Please watch the video tutorial here: https://youtu.be/r-0wRzGbSqw Trickling filters are biological reactors within wastewater treatment plants which are used to remove organic matter and/or ammonia from wastewater. Compared to the activated sludge process the microorganisms are not suspended in the mixed liquor but they are attached to a fixed bed surface. Nowadays, the fixed bed surface is ...
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A new device to select carriers for biomass immobilization and application in an aerobic/anaerobic fixed-bed sequencing batch biofilm reactor for nitrogen removal
This study proposes a new approach to selecting a biofilm carrier for immobilization using dissolved oxygen (DO) microsensors to measure the thickness of aerobic and anaerobic layers in biofilm. The biofilm carriers tested were polyurethane foam, mineral coal (MC), basaltic gravel, and low-density polyethylene. Development of layers in the biofilm carrier surface was evaluated using a flow ...
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Intrinsic kinetics for fixed bed bioreactor in hospital wastewater treatment
Variation in hospital wastewater (HWW) pollutants and differences with municipal wastewater (MWW), make the use of biokinetic coefficients obtained from activated sludge in the MWW treatment unprofitable for designing, modeling and evaluation of biological processes for HWW treatment. Since this study was conducted to evaluate the performance and biokinetic coefficients of a fixed bed ...
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Performance of a fixed-bed biofilm reactor with microbubble aeration in aerobic wastewater treatment
Microbubble aeration is supposed to be highly efficient for oxygen supply in aerobic wastewater treatment. In the present study, the performance of a fixed-bed biofilm reactor microbubble-aerated using a Shirasu porous glass (SPG) membrane system was investigated when treating synthetic municipal wastewater. The biofilm formation on the carriers was enhanced with microbubble aeration due to ...
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Submerged Fixed Film: Top 5 Considerations for Evaluating Different Systems
Submerged fixed-film systems are ideal for significantly increasing nitrification in existing wastewater treatment plants. A well-designed and operated system can double the nitrification capacity of an existing aeration basin. When choosing media for fixed-film applications, typical options include small, floating biomass carriers (moving bed systems) or structured-sheet PVC modules fixed in ...
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Effects of Fe(III) on biofilm and its extracellular polymeric substances (EPS) in fixed bed biofilm reactors
The effects of Fe(III) on the biofilm mass and activity, the biofilm micromorphology as well as the composition and functional groups characteristics of extracellular polymeric substances (EPS) in biofilm were investigated in laboratory-scale fixed bed biofilm reactors. The results showed that 2 mg/L of Fe(III) promoted the biofilm mass and improved the biofilm activity, but 16 mg/L of ...
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Wastewater Treatment Process
The wastewater treatment process is complex and critical to civilization. In simplest terms, wastewater is water that has been mixed with waste matter. Wastewater can be classified as domestic, municipal, or industrial based upon the source of generation. For instance, domestic wastewater comes from everyday liquid waste, including water used to flush the toilet, to shower, or to wash dishes. ...
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Evaluation of different configurations of hybrid membrane bioreactors for treatment of domestic wastewater
Four membrane bioreactors (MBRs) with the same dimensions were studied for 180 days: three hybrid growth membrane bioreactors with biofilm attached in different packing media and a conventional MBR (C-MBR). The four MBRs had an identical membrane module of hollow fiber with a nominal porous diameter of 0.4 μm. The MBRs were: (1) a C-MBR; (2) a moving bed membrane bioreactor (MB-MBR), ...
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Nitrogen and phosphorus removal from secondary effluent using drinking water treatment residuals fixed-bed column with intermittent operation
This work aims to explore a novel intermittently operated fixed-bed column with drinking water treatment residuals (WTR) as main medium to remove nitrogen (N) and phosphorus (P) from secondary effluent under different hydraulic loading rates (HLRs). The results showed that the WTR was beneficial for N removal and the average removal efficiency reached 59%. The denitrification was the ...
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Calibration and verification of models of organic carbon removal kinetics in Aerated Submerged Fixed-Bed Biofilm Reactors (ASFBBR): a case study of wastewater from an oil-refinery
The article presents a case-study on the calibration and verification of mathematical models of organic carbon removal kinetics in biofilm. The chosen Harremöes and Wanner & Reichert models were calibrated with a set of model parameters obtained both during dedicated studies conducted at pilot- and lab-scales for petrochemical wastewater conditions and from the literature. Next, the models were ...
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Poly (Ε-caprolactone) as substrate for water denitrification
In this paper, poly (Ε-caprolactone) (PCL) was used as carbon source and biofilm supporter in a fixed bed bioreactor to biologically remove nitrate from drinking water. The experimental results showed that denitrifying microorganisms could easily adapt to PCL as carbon source and attach to the surface of PCL granules. The fine biofilm could form on the surface of PCL granules within 15 days. ...
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Nitrate removal from groundwater using biodegradable polymers as carbon source and biofilm support
A new kind of biodegradable polymer, PBS, was used as both carbon source and biofilm support in a fixed-bed reactor to remove nitrate from groundwater. The experimental results showed that the denitrifying bacteria can easily attach to the surface of PBS granules and adapt to use PBS as carbon source. The SEM observation indicated that the fine biofilm can develop on the surface of PBS granules ...
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Treatment of winery wastewater in a full-scale fixed bed biofilm reactor
ABSTRACTThe treatment of winery wastewater was performed at full-scale applying a two-stage fixed bed biofilm reactor (FBBR) system for the discharge in the sewerage. The results of the first year of operation at the full-scale plant are presented. Values of removed organic loads and effluent concentrations were interpreted on the basis of the COD fractionation of influent wastewater assessed ...
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