Preliminary Evaluation of Sharon-Anammox Process Feasibility to Treat Ammonium-Rich Effluents Produced by Double-Stage Anaerobic Digestion of Food Waste

Milia, Stefano; Tocco, Giaime; Erby, Giovannimatteo; Gioannis, Giorgia De; Carucci, Alessandra

doi:10.1007/978-3-319-58421-8_84

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…5 In recent years, out of concerns for sustainability, it has been continuously optimized. Emerging technologies including ANMAMOX, 6 CANON, 7 SHARON, 8 and SHAR-ON-ANAMMOX 9 are becoming mature as efficient nitrogen removal ways with decreased energy needs. However, substantial energy is still required (∼45 MJ per kg nitrogen), only to release nitrogen species back as gaseous nitrogen into the atmosphere.…”

Section: ■ Introductionmentioning

confidence: 99%

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Wan

Huang

Zhou

et al. 2019

Environ. Sci. Technol.

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Nitrate-N in wastewaters is hard to be recovered because it is difficult to volatilize with an opposite charge to ammonium. Here, we have proved the feasibility of dissimilatory nitrate reduction to ammonia (DNRA) by the easy-acclimated mixed electroactive bacteria, achieving the highest DNRA efficiency of 44%. It was then coupled with microbial electrolysis to concentrate ammonium by a factor of 4 in the catholyte for recovery. The abundance of electroactive bacteria in the biofilm before nitrate addition, especially Geobacter spp., was found to determine the DNRA efficiency. As the main competitors of DNRA bacteria, the growth of denitrifiers was more sensitive to C/N ratios. The DNRA microbial community contrarily showed a stable and recoverable ammoniation performance over C/N ratios ranging from 0.5 to 8.0. A strong competition of the electrode and nitrate on electron donors was observed at the early stage (15 d) of electroactive biofilm formation, which can be weakened when the biofilm was mature on 40 d. Quantitative PCR showed a significant increase in nirS and nrfA transcripts in the ammoniation process. nirS was inhibited significantly after nitrate depletion while nrfA was still upregulated. These findings provided a novel way to recover nitrate-N using organic wastes as both electron donor and power, which has broader implications on the sustainable wastewater treatment and the ecology of nitrogen cycling.

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Section: ■ Introductionmentioning

confidence: 99%

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Wan

Huang

Zhou

et al. 2019

Environ. Sci. Technol.

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“…Among potential nitrogen vectors, digestate from anaerobic digestion plants treating agro-industrial residues represents a significant contribution to nitrogen release into the environment: more than 12,700 anaerobic digestion plants have been reported in 2017 as operating in the agricultural sector, and agricultural feedstocks comprising livestock manure, farm residues, plant residues and energy crops are the driving force of the European biogas market with a 60-70% market share [2]. The anaerobic digestion of such organic substrates transfers nitrogen from the solid to the liquid phase, which is therefore characterized by high ammonium concentrations and represents, if not properly managed, a threat to the environment [3,4]. In facts, nitrogen abundance hinders direct digestate application to soils, together with other factors like transport requirements, water content, or presence of undesired substances and pathogens [5,6].…”

Section: Introductionmentioning

confidence: 99%

Aerobic granular sludge formation in a sequencing batch reactor treating agro-industrial digestate

Carucci

Cappai

Erby

et al. 2020

Environmental Technology

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Most of nitrogen emissions can be ascribed to agro-industrial activities. Since digestate produced by fermentation of agro-industrial residues can be difficult to dispose of due to its high ammonium content, advanced technical-and cost-effective technologies must be developed and applied in order to significantly reduce its impact on the environment. In this study, aerobic granules were successfully cultivated in a granular sludge sequencing batch reactor (GSBR) fed with the ammonium-rich (approx. 2500 mg L −1 ) effluent of a 3-stage anaerobic digester treating agro-industrial residues. The peculiar characteristics of such wastewater required a 2-step operating strategy aimed at the selection of nitrifying biomass (Step 1) and the formation of aerobic granular sludge (Step 2). During Step 1, nitrifying biomass selection was achieved by properly regulating the cycle length: NH + 4 -N removal rates progressively increased from 42 to 109 mg N L −1 d −1 , and a corresponding increase in NH + 4 -N specific removal rates from 8 to 24 mg N g VSS −1 d −1 was also observed. During Step 2, the increase in selective pressures (i.e. minimum settling velocity and volumetric organic loading rate) led to the formation of compact (average diameter, 1.02 ± 0.43 mm) and well-settling granules (SVI 5 , 28.6 ± 3.8 mL g TSS −1 ), which were able to remove up to 89 ± 2% of organic matter (as COD), 79 ± 3% of NH + 4 -N and 59 ± 4% of nitrogen (as a sum of NH + 4 -N, NO -2 -N and NO -3 -N). The 2-step operating strategy played a key role in biomass selection and subsequent granule formation and maintenance in the GSBR, and may be successfully adopted for the treatment of different ammonium-rich wastewaters.

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Enhanced biological nitrogen removal and N2O emission characteristics of the intermittent aeration activated sludge process

Sun

Guan

Pan

et al. 2017

Rev Environ Sci Biotechnol

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Preliminary Evaluation of Sharon-Anammox Process Feasibility to Treat Ammonium-Rich Effluents Produced by Double-Stage Anaerobic Digestion of Food Waste

Cited by 4 publications

References 9 publications

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Aerobic granular sludge formation in a sequencing batch reactor treating agro-industrial digestate

Enhanced biological nitrogen removal and N2O emission characteristics of the intermittent aeration activated sludge process

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