Improvement in nitrification through the use of natural zeolite: influence of the biomass concentration and inoculum source

Montalvo, Silvio; Guerrero, Lorna; Borja, R.

doi:10.1007/s13762-013-0364-3

Cited by 15 publications

(15 citation statements)

References 27 publications

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“…In one SBR, 5 g L −1 zeolite also was added (particle diameter: 0.25–0.5 mm; specific area: 24.9 m 2 g −1 zeolite), giving a value of 0.2 gVSS g −1 zeolite. This value generated a VSS g −1 zeolite ratio ranging between 0.05 and 0.3, values that agreed with those reported previously . In order to keep the biomass and zeolite distributed homogenously in the liquid phase, both systems were mechanically agitated (DLAB OSD20‐S, Mundolab, Chile) at 400 rpm.…”

Section: Methodssupporting

confidence: 84%

“…(a). The increase of VSS in the presence of zeolite also was observed by Montalvo et al and can be related to the release of attached biomass from the biofilm or to the greater availability of TAN for AOB because of the adsorption of nitrogen on the zeolite.…”

Section: Resultssupporting

confidence: 71%

“…There are several reports on the biofilm formation on zeolite and how this can help improve different kinds of biological processes. The biofilm formation was monitored through optical microscopy up to ×40., and pictured in Figure .…”

Section: Resultsmentioning

confidence: 99%

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Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier

Huiliñir

Fuentes

Esposito

et al. 2019

J of Chemical Tech & Biotech

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It has recently come to our attention that the Acknowledgements section has been missed to include in the article 'Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier' REFERENCE 1 Huiliñir C, Fuentes V, Esposito G, Montalvo S and Guerrero L, Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier.

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Section: Methodssupporting

confidence: 84%

Section: Resultssupporting

confidence: 71%

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Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier

Huiliñir

Fuentes

Esposito

et al. 2019

J of Chemical Tech & Biotech

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“…Most recently, Montalvo et al (2014a) and Guerrero et al (2014), when operating with fluidized anaerobic reactors and UASB, respectively, observed the acceleration of the start-up stage upon utilizing natural zeolites in both types of reactors. The use of zeolites also accelerated the start-up of the nitrogen removal processes (Montalvo et al 2014b).…”

Section: Resultsmentioning

confidence: 99%

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Guerrero

Montalvo

Huiliñir

et al. 2016

Int. J. Environ. Sci. Technol.

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One of the technologies used for wastewater nitrogen removal consists in simultaneous nitrificationdenitrification. The low microbial growth rate and the low availability of organic material for the denitrification stage make it necessary to study new operational conditions and the use of microbial supports. The aim of this study was to evaluate the operational behavior of a simultaneous nitrification-denitrification process in a sequential batch reactor utilizing zeolite as a biomass support and step-feed strategy. Two reactors of 2 L were used, one with zeolite and another without zeolite, both operated at constant temperature (31°C), varying nitrogen loading rate (NLR) from 0.041 to 0.113 kg total Kjeldahl nitrogen (TKN/m 3 /day). After 209 days, removals higher than 86 and 96 % in nitrogen compounds and organic matter were obtained, respectively. There was not accumulation of nitrate and nitrite in any case; this means that there was a simultaneous nitrification-denitrification in the reactors. The incorporation of zeolite in the system held higher concentration of biomass in the reactor; this led to reduce start-up to 21 days and to improve 11.31 % removal kinetic. The use of a stepfeed strategy prevents events of inhibition by substrate, even duplicating tolerance to higher NLR for the same operation time.

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“…The cause of overall higher mortality in Anopheles larval trays without-waterchange (NC and NCZ) in comparison to those with water-change (DC and DCZ) could range from hypoxia, ammonia toxicity, inability to transport oxygen, pathogenicity, nutrient enrichment, and competition for food resource [30,[32][33][34]. In addition, the bacterial build-up that typically accompanies waste accumulation could compound these effects, by increasing hypoxia, ammonia production and/or potential direct bacterial toxicity [29,[35][36][37].…”

Section: Discussionmentioning

confidence: 99%

Improvement of Water Quality for Mass Anopheline Rearing: Evaluation of the Impact of Ammonia-capturing Zeolite on Larval Development and Adult Phenotypic Quality

Akpodiete

Tripet

2020

Preprint

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BackgroundVector control approaches that rely on mosquito releases such as the sterile insect technique (SIT) and suppression or replacement strategies relying on genetically modified mosquitoes (GMM) depend on effective mass production of Anopheles mosquitoes. For optimal development, Anophelines typically require relatively clean water which can be in short supply in some settings. Water replacement requires complex and onerous continuous-flow-systems and/or expensive water filtration systems like ultrafiltration and reverse osmosis. Thus, there is a need for simple cost-effective water management and treatment solutions. Zeolites are additives that have been extensively applied in fish and crustacean aquaculture to improve water quality because of their selective adsorption of ammonia and toxic heavy metals. The many advantages of zeolites include low cost, abundance in many parts of the world and their environmental friendliness, but so far they have not been exploited for mosquito rearing.MethodsThis study evaluated the independent effects of zeolite and daily water changes (to simulate a continuous flow system) on the rearing of An. coluzzii under two feed regimes (powder or solution feed) and larval densities (200 and 400 larvae per tray). The duration of larval development, adult emergence success and phenotypic quality (body size) were recorded to assess the impact of water treatments on mosquito numbers and phenotypic quality and to identify the optimal feeding regimes and density for zeolite use.ResultsOverall, mosquito emergence, duration of development and adult phenotypic quality was significantly better in treatments with daily water changes. In treatments without daily water changes, zeolite significantly improved water quality at the lower larval rearing density, resulting in higher mosquito emergence. Duration of development was significantly longer in zeolite treatments. At the lower larval rearing density, adult phenotypic quality did not significantly differ between zeolite treatment without water changes and those with daily changes. ConclusionsThese results suggest that treating rearing water with zeolite can improve mosquito production under some conditions, and thus offer a cheaper alternative to more expensive techniques such as ultrafiltration or reverse osmosis, which are often part of continuous water change systems. Further studies are needed to optimize its uses for rearing Anopheles gambiae s.l.

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Improvement in nitrification through the use of natural zeolite: influence of the biomass concentration and inoculum source

Abstract: 18 19A batch nitrification process was studied using synthetic wastewater as substrate and 20Chilean natural zeolite as biomass carrier at ambient temperatures (20 ºC). Three groups of 21 experiments were carried out: a first experimental set (I) with and without added zeolite using

Cited by 15 publications

References 27 publications

Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier

Nitrification in the presence of sulfide and organic matter in a sequencing moving bed biofilm reactor (SMBBR) with zeolite as biomass carrier

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Improvement of Water Quality for Mass Anopheline Rearing: Evaluation of the Impact of Ammonia-capturing Zeolite on Larval Development and Adult Phenotypic Quality

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