Ballasted Flotation with Glass Microspheres for Removal of Natural Organic Matter

Jarvis, Peter; Martin, J. W.; Winspear, Tracey; Jefferson, Bruce

doi:10.1080/01496395.2011.607484

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…The beads may be recovered from sludge by hydrocyclones, centrifuges or vibratory screens and recycled for multiple utilisations (Eades and Penno, 2005;Jarvis et al, 2009). The high natural organic matter and total suspended solids (TSS) recovery efficiency of a similar enhanced flotation process treating water from a drinking water treatment plant and sewer overflows was demonstrated by Jarvis et al (2011) and Stanley and Evans (1977). The efficiency of enhanced flotation for the recovery of particulate matter in the effluent of an HR-MBBR remains has not yet been reported.…”

Section: B + C B + S B + S O2 → X Sto + X Oho + X B (1)mentioning

confidence: 99%

Compact secondary treatment train combining a lab-scale moving bed biofilm reactor and enhanced flotation processes

et al. 2016

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High-rate wastewater processes are receiving a renewed interest to obtain energy positive/efficient water resource recovery facilities. An innovative treatment train combining a high-rate moving bed biofilm reactor (HR-MBBR) with an enhanced flotation process was studied. The two objectives of this work were 1) to maximize the conversion of soluble organics to particulate matter in an HR-MBBR and 2) to maximize the particulate matter recovery from the HR-MBBR effluent by green chemicals to enhance biogas production by anaerobic digestion. To achieve these objectives, lab-scale MBBRs fed with synthetic soluble wastewater were operated at organic loading rates (OLRs) between 4 and 34 kg COD m reactor d corresponding to hydraulic retention times (HRTs) between 6 and 54 min. Colloidal and soluble chemical oxygen demand (COD) removal efficiency in the HR-MBBR increased with HRT to reach a plateau of 85% at an HRT longer than 27 min. Carrier clogging observed at an OLR higher than 16 kg COD m d (HRT < 13 min) resulted in about 23% loss in colloidal and soluble COD removal efficiency. Thus, the recommended parameters were between 22 and 37 min and between 6 and 10 kg COD m d for the HRT and the OLR, respectively, to maximize the conversion of soluble organics to particulate matter. Total suspended solids (TSS) recovery of 58-85% and 90-97% were achieved by enhanced flotation using green and unbiodegradable chemicals, respectively, corresponding to a TSS effluent concentration below 14 and 7 mg TSS/L. Among the synthetic polymers tested, a high molecular weight and low charge density cationic polyacrylamide was found to give the best results with less than 2 mg TSS/L in the clarified effluent (97% TSS recovery). Green chemicals, although performing slightly less for solids separation than unbiodegradable chemicals, achieved a mean TSS concentration of 10 ± 3 mg/L in the clarified effluent.

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Section: B + C B + S B + S O2 → X Sto + X Oho + X B (1)mentioning

confidence: 99%

Compact secondary treatment train combining a lab-scale moving bed biofilm reactor and enhanced flotation processes

et al. 2016

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“…There are some modern approaches for colour removal, especially ballasted coagulation on the lamellas (Capodaglio et al, 2011), ballasted flotation (Jarvis et al, 2011), nanofiltration (Vergel et al, 2017, combination of coagulation and microfiltration (Ødegaard et al, 2010), biofiltration with pre-oxidation (Pharand et al, 2015), adsorption (Bhatnagar & Sillanpää, 2017), ion exchange (Levchuk, Márquez & Sillanpää, 2018), electrochemical methods (Särkkä, Vepsäläinen & Sillanpää, 2015), etc.…”

Section: Introductionmentioning

confidence: 99%

Suspension Sorbents for Removal of Arsenic Compounds and Humates From Water

Litynska

Dontsova

2020

WPT STN

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This paper is devoted to the features of the synthesis and applications of suspension iron(III)-based sorbents in water treatment. The problems of toxic impurities of the drinking water, especially soluble arsenic compounds or different organic disinfection by-products, are very acute not only for Ukraine, but for many other countries too. So, it is very important to find simple and effective method to treat polluted natural waters to the required quality. The comparison of different treatment methods for removal of arsenic compounds and humates was made, as a result of which it was determined that the usage of adsorbents, especially fine particle iron-based sorbents, is very effective in natural organic matter removal and some other pollutants. Fine particle iron-based adsorbents are effective for arsenic removal due to its chemical structure. These materials removed arsenic compounds by chemisorption processes and immobilization of arsenate and arsenite ions in the insoluble form of ferric arsenate. Thus, the aim of the work was to develop the adsorbent for effective removal of arsenic compounds and humates from natural waters. We synthesized 7 suspension iron(III)-based sorbents by homogeneous precipitation from FeCl3 solution by thermal hydrolysis of urea. The efficiency of synthesized samples was checked by adsorption tests (humates and arsenite removal) and capillary suction time test. Iron(III) oxyhydroxide was the main phase of the most effective fine particle adsorbents. Applications on natural water showed that the synthesized iron(III) oxyhydroxide effectively removed arsenic compounds not only from model waters, but also from natural water with reaching of regulatory requirements.

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Buoy-bead flotation application for the harvesting of microalgae and mechanistic analysis of significant factors

Wen

Zou

et al. 2018

Bioprocess Biosyst Eng

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Ballasted Flotation with Glass Microspheres for Removal of Natural Organic Matter

Cited by 7 publications

References 18 publications

Compact secondary treatment train combining a lab-scale moving bed biofilm reactor and enhanced flotation processes

Compact secondary treatment train combining a lab-scale moving bed biofilm reactor and enhanced flotation processes

Suspension Sorbents for Removal of Arsenic Compounds and Humates From Water

Buoy-bead flotation application for the harvesting of microalgae and mechanistic analysis of significant factors

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