Nitrogen Removal from Anaerobically Digested Swine Waste Centrate Using a Laboratory-Scale Chabazite-Sequencing Batch Reactor

Aponte-MoralesVerónica, E; TongShuang,; ErgasSarina, J

doi:10.1089/ees.2015.0577

Cited by 18 publications

(11 citation statements)

References 34 publications

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“…This biological mechanism has been observed and optimized for removal of nitrogen from wastewater using zeolite columns; further research is needed to determine if it spontaneously occurs under the conditions outlined in this study. Based on the inhibition of nitrification due to high total ammonia concentrations in urine, and the weekly regeneration with strong acid, we do not expect significant biological nitrification in the cartridges. Other potential questions for future work include the fate of other urine constituents during ion exchange (e.g., trace organic contaminants, metals) and the effects of urine-derived fertilizers on plant growth.…”

Section: Discussionmentioning

confidence: 96%

Life-Cycle Cost and Environmental Assessment of Decentralized Nitrogen Recovery Using Ion Exchange from Source-Separated Urine through Spatial Modeling

Kavvada

Tarpeh

Horvath

et al. 2017

Environ. Sci. Technol.

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Nitrogen standards for discharge of wastewater effluent into aquatic bodies are becoming more stringent, requiring some treatment plants to reduce effluent nitrogen concentrations. This study aimed to assess, from a life-cycle perspective, an innovative decentralized approach to nitrogen recovery: ion exchange of source-separated urine. We modeled an approach in which nitrogen from urine at individual buildings is sorbed onto resins, then transported by truck to regeneration and fertilizer production facilities. To provide insight into impacts from transportation, we enhanced the traditional economic and environmental assessment approach by combining spatial analysis, system-scale evaluation, and detailed last-mile logistics modeling using the city of San Francisco as an illustrative case study. The major contributor to energy intensity and greenhouse gas (GHG) emissions was the production of sulfuric acid to regenerate resins, rather than transportation. Energy and GHG emissions were not significantly sensitive to the number of regeneration facilities. Cost, however, increased with decentralization as rental costs per unit area are higher for smaller areas. The metrics assessed (unit energy, GHG emissions, and cost) were not significantly influenced by facility location in this high-density urban area. We determined that this decentralized approach has lower cost, unit energy, and GHG emissions than centralized nitrogen management via nitrification-denitrification if fertilizer production offsets are taken into account.

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Section: Discussionmentioning

confidence: 96%

Life-Cycle Cost and Environmental Assessment of Decentralized Nitrogen Recovery Using Ion Exchange from Source-Separated Urine through Spatial Modeling

Kavvada

Tarpeh

Horvath

et al. 2017

Environ. Sci. Technol.

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“…Although SBBRs have been successfully used for treatment of low-strength domestic wastewater, the high concentrations of TAN and refractory organic matter in landfill leachate present a challenge that could be addressed through hybrid adsorption and biological treatment processes. 14 Adsorptive media can be used to overcome microbial inhibition by temporarily adsorbing contaminants and allowing more time for their biodegradation. An advantage of this approach is that the adsorbent media is bioregenerated in situ by attached biofilms without having to add more adsorbent or generating waste brines that require further treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Importantly, the IX capacity of the bioregenerated chabazite did not decrease even after 40 cycles of operation of a Zeolite-SBR treating anaerobically digested swine waste centrate. 14 Yalcuk and Ugurlu 18 added zeolite to vertical flow constructed wetlands to treat landfill leachate, which enhanced ammonia removal from 48.9% to 62.3%.…”

Section: Introductionmentioning

confidence: 99%

Enhanced landfill leachate treatment in sequencing batch biofilm reactors (SBBRs) amended with zeolite and biochar

Gao

Yang

Dasi

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Biological treatment of landfill leachate is inhibited by high concentrations of ammonia and recalcitrant organic matter. This study investigated the addition of natural adsorbent materials, zeolite (clinoptilolite) and biochar, to enhance biological treatment of landfill leachate in sequencing batch biofilm reactors (SBBRs). Three bench-scale SBBRs were set up with varying types of biofilm support media: (i) lightweight expanded clay aggregate (LECA) as a control (C-SBBR); (ii) LECA + zeolite (CZ-SBBR); and (iii) LECA + zeolite + biochar (CZB-SBBR). SBBRs were operated with alternating anoxic and aerobic stages to promote total nitrogen (TN) removal via nitrification/denitrification. RESULTS: Excellent TAN removal (>99%) was achieved in all three SBBRs throughout the study, most likely as a result of the favorable environmental conditions and long hydraulic retention time (HRTs) applied (nine or more days). Biochar addition in CZB-SBBR resulted in significantly higher chemical oxygen demand (COD) (61-83%) and color (82-95% as UV456) removals compared with C-SBBR (42-44% for COD and 28-33% for color) and CZ-SBBR (34-45% for COD and 20-35% for color). High effluent nitrate (NO 3 − ) concentrations initially were observed in CZB-SBBR, most likely due to limited organic carbon availability for denitrification. However, after >1 year of operation, NO 3 − accumulation declined and TN removal of 81% was achieved, indicating that the main nitrogen removal pathway shifted from simultaneous nitrification/denitrification to partial nitritation/ anammox. CONCLUSIONS: Zeolite/biochar amended SBBRs are a promising approach for enhanced landfill leachate treatment.

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“…Previous studies on the removal of NH 4 + –N from ammonium-rich centrate mainly focused on biological treatment and chemical/physical extractions (Table S1 of the Supporting Information, SI). Classical biological treatment, i.e., combination of nitrification and denitrification (ND) processes, is widely used in practical engineering. ,, The need for external carbon sources and inhibition of nitrification caused by the existence of free ammonia with a relatively high concentration still restrict the development of ND processes . In recent years, the anaerobic ammonium oxidation (ANAMMOX) process, which utilizes nitrite as an electron acceptor to oxidize ammonium and produce gaseous nitrogen, has been widely studied owing to its improved energy efficiency in the treatment of ammonium-rich wastewater. ,,, However, the ANAMMOX process has several constraints, such as the growth of nitrite oxidation bacteria and unstable performance of nitritation .…”

Section: Introductionmentioning

confidence: 99%

“…3,5,7 The need for external carbon sources and inhibition of nitrification caused by the existence of free ammonia with a relatively high concentration still restrict the development of ND processes. 10 In recent years, the anaerobic ammonium oxidation (ANAMMOX) process, which utilizes nitrite as an electron acceptor to oxidize ammonium and produce gaseous nitrogen, has been widely studied owing to its improved energy efficiency in the treatment of ammonium-rich wastewater. 1,3,11,12 However, the ANAM-MOX process has several constraints, such as the growth of nitrite oxidation bacteria and unstable performance of nitritation.…”

Section: ■ Introductionmentioning

confidence: 99%

Utilization of Bidirectional Cation Transport in a Thin Film Composite Membrane: Selective Removal and Reclamation of Ammonium from Synthetic Digested Sludge Centrate via an Osmosis–Distillation Hybrid Membrane Process

Wang

Zhang

et al. 2020

Environ. Sci. Technol.

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Selective removal and resource recovery of ammonium nitrogen (NH 4 + −N) from high-strength ammonium waste streams is of practical importance for biological wastewater treatment and environmental protection. In this study, we demonstrate the simultaneous removal and reclamation of ammonium from synthetic digested sludge centrate via a novel osmosis-distillation hybrid membrane (ODHM) process. Using NaHCO 3 as the draw solute, ammonium diffuses from the synthetic centrate to the draw solution by utilizing the bidirectional cation transport nature of the thin film composite (TFC) membrane. Then, NH 4 + is converted to gaseous NH 3 at 60 °C and recovered by a sweeping gas membrane distillation (SGMD) process. Herein, the bidirectional transport of monovalent cations in the osmotic process, selectivity of TFC membranes for different cations, and recovery of the draw solution following the extraction of ammonia through the SGMD process were systematically investigated. The removal of NH 4 + −N from the synthetic centrate achieved 21.34% during a 6-h continuous operation of the ODHM system, with ammonium fluxes through the TFC and SGMD membranes at 1.39 and 0.57 mol m −2 h −1 , respectively. A secondary interfacial polymerization was proposed to further enhance ammonium transport through the TFC membrane. Results reported here highlight the potential of the ODHM process for the selective removal and reclamation of ammonium from ammonium-rich waste streams.

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Nitrogen Removal from Anaerobically Digested Swine Waste Centrate Using a Laboratory-Scale Chabazite-Sequencing Batch Reactor

Cited by 18 publications

References 34 publications

Life-Cycle Cost and Environmental Assessment of Decentralized Nitrogen Recovery Using Ion Exchange from Source-Separated Urine through Spatial Modeling

Life-Cycle Cost and Environmental Assessment of Decentralized Nitrogen Recovery Using Ion Exchange from Source-Separated Urine through Spatial Modeling

Enhanced landfill leachate treatment in sequencing batch biofilm reactors (SBBRs) amended with zeolite and biochar

Utilization of Bidirectional Cation Transport in a Thin Film Composite Membrane: Selective Removal and Reclamation of Ammonium from Synthetic Digested Sludge Centrate via an Osmosis–Distillation Hybrid Membrane Process

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