Bromate removal during transition from new granular activated carbon (GAC) to biological activated carbon (BAC)

Asami, Mari; Aizawa, Tomoyasu; Morioka, Toshihiro; Nishijima, Wataru; Tabata, Akihisa; Magara, Yasumoto

doi:10.1016/s0043-1354(98)00504-1

Cited by 90 publications

(46 citation statements)

References 9 publications

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“…The BrO 3 − that is removed by activated carbon has been postulated to be adsorbed, reduced to hypobromite (BrO − ) and finally reduced to bromide (Br − ) on the activated carbon surface [10]. The mechanism by which BrO 3 − is removed by activated carbon has also been analyzed by other researchers [11][12][13], especially with reference to the surface conditions and properties of many forms of activated carbon including granular activated carbon (GAC) and powdered activated carbon (PAC). These researchers have posited that BrO 3 − is reduced by activated carbon according to the following reactions.…”

Section: Introductionmentioning

confidence: 99%

Effect of characteristics of activated carbon on removal of bromate

Huang

Cheng

2008

Separation and Purification Technology

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Section: Introductionmentioning

confidence: 99%

Effect of characteristics of activated carbon on removal of bromate

Huang

Cheng

2008

Separation and Purification Technology

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“…The reduction of COD during the adsorption process may be caused by AC's decomposition of H2O2, producing an exchange of a surface hydroxyl group with a hydrogen peroxide anion (Bansal et al, 1988). The bromine concentration was reduced due to the adsorption processes after AOPs (Asami et al, 1999;Bao et al, 1999;Kiristis et al, 2000) however it the relatively low level of elimination of bromine could be caused by the presence of a high DO in the solution because of the ozonation process, which restricts the adsorption of bromate in AC (Kiristis et al, 2001). The higher elimination of bromine obtained using adsorption process before AOPs may be due a lower concentration of DO in the solution submitted to the adsorption process (Kiristis et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Treatment of seawater for rotifer culture uses applying adsorption and advanced oxidation processes

Poblete-Chávez

Cortés-Pizarro

Rojas-Araya

2016

lajar

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ABSTRACT. The use of live feed is common in aquaculture processes due to its nutritional advantages, and rotifers comprise one of the most used feeds in finfish aquaculture. However, bacteria present in water used for rotifer culture are a significant source of infection and consequently diseases could cause mortality in fishes. Advanced oxidation process (AOPs) are methods that may be useful to eliminate bacterial infections present in aquaculture wastewater and may allow the reuse of this water. Therefore, the prospect of using different advanced oxidation processes to inactivate Vibrio spp. and total bacteria cultures (TCB) present in this kind of water was evaluated. In particular, UVc/O3/H2O2, UVc/H2O2 and O3/H2O2 and the adsorption process were applied to seawater coming from a fish farming tank. The results obtained were highly promising because it was possible to inactivate 100% of bacteria present in the seawater when UVc/ozone/hydrogen peroxide and UVc/hydrogen peroxide were applied, needing around 20 and 80 min for Vibrio spp. and total culturable bacteria inactivation, respectively. These results are justified due to the strong action between H2O2 in the presence of UVc, which may produce a large amount of hydroxyl radicals. Nevertheless, when ozone/hydrogen peroxide was applied, total inactivation of bacteria did not occur. Also, an interesting relationship between bacteria inactivation and oxide reduction potential of seawater was observed during the process. Rotifers put in water after the treatment did not suffer behavior changes (swimming) and no mortalities were observed. Keywords: rotifers, bacteria, UV irradiation, ozone, hydrogen peroxide, aquaculture.Tratamiento de agua de mar para el cultivo de rotíferos mediante procesos de adsorción y oxidación avanzados RESUMEN. El uso de organismos vivos como alimento es común en la acuicultura, debido a sus ventajas nutricionales. Los rotíferos constituyen uno de los alimentos principales en el cultivo de peces. Sin embargo, las bacterias presentes en aguas utilizadas en el cultivo de rotíferos son una fuente importante de infección y pueden causar enfermedades y mortalidad en peces. Los procesos de oxidación avanzados son métodos útiles para eliminar bacterias presentes en aguas residuales de la acuicultura, permitiendo su reutilización. Se evaluó la inactivación de Vibrio spp. y bacterias cultivables totales presentes en aguas residuales de la acuicultura a través procesos de oxidación avanzados. Particularmente, se estudió la aplicación de UVc/O3/H2O2, UVc/H2O2 y O3/H2O2 junto a procesos de adsorción aplicados a agua proveniente de un estanque de cultivo de peces. Los resultados obtenidos son muy prometedores debido a que fue posible inactivar el 100% de bacterias presentes cuando se utilizó UVc/O3/H2O2 y UVc/H2O2, requiriendo 20 y 80 min para la inactivación de Vibrio spp. y bacte- __________________ Corresponding editor: Ricardo Prego 780Latin American Journal of Aquatic Research rias cultivables totales, respectivamente. Estos resultados se expl...

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“…Water 2017, 9,94 19 of 25 BAC is not usually considered able to remove bromate and bromide [16], more than 15% removal was observed for bromate and bromide. BAC filtration removed approximately 46% of the bromide for the medium and high bromide/iodide concentrations.…”

Section: Bromide and Iodide Spikingmentioning

confidence: 99%

Small Scale Direct Potable Reuse (DPR) Project for a Remote Area

Zhang

Duke

Northcott

et al. 2017

Water

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An Advanced Water Treatment Plant (AWTP) for potable water recycling in Davis Station Antarctica was trialed using secondary effluent at Selfs Point in Hobart, Tasmania, for nine months. The trials demonstrated the reliability of performance of a seven barrier treatment process consisting of ozonation, ceramic microfiltration (MF), biologically activated carbon, reverse osmosis, ultra-violet disinfection, calcite contactor and chlorination. The seven treatment barriers were required to meet the high log removal values (LRV) required for pathogens in small systems during disease outbreak, and on-line verification of process performance was required for operation with infrequent operator attention. On-line verification of pathogen LRVs, a low turbidity filtrate of approximately 0.1 NTU (Nephelometric Turbidity Unit), no long-term fouling and no requirement for clean-in-place (CIP) was achieved with the ceramic MF. A pressure decay test was also reliably implemented on the reverse osmosis system to achieve a 2 LRV for protozoa, and this barrier required only 2-3 CIP treatments each year. The ozonation process achieved 2 LRV for bacteria and virus with no requirement for an ozone residual, provided the ozone dose was >11.7 mg/L. Extensive screening using multi-residue gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) database methods that can screen for more than 1200 chemicals found that few chemicals pass through the barriers to the final product and rejected (discharge) water streams. The AWTP plant required 1.93 kWh/m 3 when operated in the mode required for Davis Station and was predicted to require 1.27 kWh/m 3 if scaled up to 10 ML/day. The AWTP will be shipped to Davis Station for further trials before possible implementation for water recycling. The process may have application in other small remote communities.

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Bromate removal during transition from new granular activated carbon (GAC) to biological activated carbon (BAC)

Cited by 90 publications

References 9 publications

Effect of characteristics of activated carbon on removal of bromate

Effect of characteristics of activated carbon on removal of bromate

Treatment of seawater for rotifer culture uses applying adsorption and advanced oxidation processes

Small Scale Direct Potable Reuse (DPR) Project for a Remote Area

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