Nitrification denitrification via nitrite in a pilot-scale SBR treating the liquid fraction of co-digested piggery/poultry manure and agro-wastes

Scaglione, Davide; Tornotti, Giorgio; Teli, Aronne; Lorenzoni, Luca; Ficara, Elena; Canziani, Roberto; Malpei, Francesca

doi:10.1016/j.cej.2013.05.075

Cited by 40 publications

(18 citation statements)

References 29 publications

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“…Ninety-six percent of the total regional plants are characterized by a nominal power class up to 0.999 MW, corresponding to the maximum threshold for obtaining public funding for electricity production from renewable sources [24]. Given the strict European regulations for nitrogen loads, biogas plants also represent a solution for limiting the negative externalities from disposal of livestock manures, such as groundwater nitrate pollution [25].…”

Section: The Study Areamentioning

confidence: 99%

Are advantages from the partial replacement of corn with second-generation energy crops undermined by climate change? A case study for giant reed in northern Italy

Cappelli

Yamaç

Stella

et al. 2015

Biomass and Bioenergy

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Section: The Study Areamentioning

confidence: 99%

Are advantages from the partial replacement of corn with second-generation energy crops undermined by climate change? A case study for giant reed in northern Italy

Cappelli

Yamaç

Stella

et al. 2015

Biomass and Bioenergy

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“…Even though SND has been studied by diverse authors, especially in the latest years (Guo et al 2013;Scaglione et al 2013;Zheng et al 2013), the application of this process has shortcomings that hinder achieving an adequate operational robustness: low growth rate of the microorganisms involved in the process, high sensitivity to moderate concentrations of sulfurs, nitrates and nitrites (Bernet et al 2001), high energy costs (Cecen 1996) and availability of organic matter (Guo et al 2009;Martins et al 2003). That is the reason why the search for improvements of the existing processes has led to the proposal of using zeolite as a microbial support and ammonium ion exchanger (Hedström 2001;Ho and Ho 2012;Mace and Mata-Alvarez 2002;Wei et al 2010;Wilderer et al 2000Wilderer et al , 2001.…”

Section: Introductionmentioning

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 loading rate was three times higher than that of Wu et al (2014), and a high nitritation efficiency was still maintained. The ammonium loading rate and the nitritation efficiency were also both higher than those of Scaglione et al (2013), who obtained an ammonium loading rate of 0.5 g l -1 d -1 and a nitritation efficiency of 80% in a pilot SBR treating high ammonium wastewater. In the present double-sludge system, ammonium loading rate could be further increased on the basis of high nitritation efficiency by modifying the operating conditions.…”

Section: Resultsmentioning

confidence: 90%

N2O emission from a nitritation double-sludge system treating wastewater with a high concentration of ammonium

2016

Global NEST Journal

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A high efficient nitrite based double-sludge system combining sequential denitrification and nitritation reactors has been developed to remove nitrogen from wastewaters containing high concentrations of ammonium. System performance was examined and also nitrous oxide (N2O) emission was measured under different aeration rates with or without the addition of nitrite nitrogen (NO2-N). The nitritation efficiency (the ratio of NO2-N to the oxidized nitrogen, NOX-N) reached to 99.8% at the ammonium loading rate of 1.47 g l -1 d -1. With increasing the aeration rate, ammonium oxidizing rate increased, indicating that the activity of ammonia oxidizing bacteria was enhanced. However, N2O emission decreased with increasing the aeration rate. N2O emission was high with the addition of NO2-N. The aeration rate had a high effect on N2O emission at high initial NO2-N concentrations, with the N2O emission factor ranged from 0.59% to 1.64%. While the effect of aeration rate on N2O emission was not significantly without the addition of NO2-N, with the emission factor of only around 0.20% to 0.27%.

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Nitrification denitrification via nitrite in a pilot-scale SBR treating the liquid fraction of co-digested piggery/poultry manure and agro-wastes

Cited by 40 publications

References 29 publications

Are advantages from the partial replacement of corn with second-generation energy crops undermined by climate change? A case study for giant reed in northern Italy

Are advantages from the partial replacement of corn with second-generation energy crops undermined by climate change? A case study for giant reed in northern Italy

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

N2O emission from a nitritation double-sludge system treating wastewater with a high concentration of ammonium

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