Design and Operational Considerations for Ammonia Removal From Centrate by Steam Stripping

Gopalakrishnan, K.; Anderson, Justin; Carrio, L.; Abraham, Ken; Stinson, Brad J

doi:10.2175/193864700784607361

Cited by 7 publications

(4 citation statements)

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“…As this BP-ED system operated at both high TAN transport rate and removal efficiency with low energy consumption, it is a promising solution toward upscaling of ammonia recovery from wastewater. Additionally, this more compact system with high treatment capacity can become an interesting alternative to technologies such as conventional stripping or forward osmosis. − The influence of bivalent ions found in centrate was not included in this study. Several studies previously demonstrated the scaling effects on a CEM when calcium and magnesium are present in the influent, even at low concentrations. − Therefore, future research should focus on real wastewater to investigate the effects of scaling and (bio)fouling in this BP-ED stack for ammonia recovery and further scaling up with more cell pairs.…”

Section: Resultsmentioning

confidence: 99%

Minimal Bipolar Membrane Cell Configuration for Scaling Up Ammonium Recovery

Rodrigues

Mattos

Sleutels

et al. 2020

ACS Sustainable Chem. Eng.

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Electrochemical systems for total ammonium nitrogen (TAN) recovery are a promising alternative compared with conventional nitrogen-removal technologies. To make them competitive, we propose a new minimal stackable configuration using cell pairs with only bipolar membranes and cation-exchange membranes. The tested bipolar electrodialysis (BP-ED) stack included six cell pairs of feed and concentrate compartments. Critical operational parameters, such as current density and the ratio between applied current to nitrogen loading (load ratio), were varied to investigate the performance of the system using synthetic wastewater with a high nitrogen content as an influent (NH 4 + ≈ 1.75 g L –1 ). High TAN removal (>70%) was achieved for a load ratio higher than 1. At current densities of 150 A m –2 and a load ratio of 1.2, a TAN transport rate of 1145.1±14.1 g N m –2 d –1 and a TAN-removal efficiency of 80% were observed. As the TAN removal was almost constant at different current densities, the BP-ED stack performed at a high TAN transport rate (819.1 g N m –2 d –1 ) while consuming the lowest energy (18.3 kJ g N –1 ) at a load ratio of 1.2 and 100 A m –2 . The TAN transport rate, TAN removal, and energy input achieved by the minimal BP-ED stack demonstrated a promising new cell configuration for upscaling.

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Section: Resultsmentioning

confidence: 99%

Minimal Bipolar Membrane Cell Configuration for Scaling Up Ammonium Recovery

Rodrigues

Mattos

Sleutels

et al. 2020

ACS Sustainable Chem. Eng.

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“…These include: air stripping with acid adsorption (Sagberg et al, 2006); steam stripping (Teichgräber and Stein, 1994;Gopalakrishnan et al, 2000); ion exchange with vacuum distillation and membrane extraction (du Preez et al 2005). The interested reader is directed towards the extensive literature available for further information.…”

Section: Ammonia Recoverymentioning

confidence: 99%

Resource Recovery Potential from Side-Streams: An Australian Study

Barber¹

2013

proc water environ fed

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ABTRACTThe recovery of phosphorous via struvite and nitrogen as ammonia from appropriate wastewater side-streams was studied by a major Australian Water Utility at its two largest sites. One of which is based on a standard configuration of primary settlement followed by secondary treatment, whilst the other was a lagoon based system combining anaerobic and aerobic treatment. The expected recoverable quantities of phosphorous and nitrogen nutrients were influenced by a number of parameters including: performance of both anaerobic digestion and secondary treatment; phosphorous content and reactive proportion within the wastewater. Nutrient recovery was found to have several positive influences, such as the reduction in aeration requirements due to extraction of ammonia, either directly or within struvite, and reduction in carbon footprint. However, the study showed that neither the recovery of phosphorous nor ammonia was financially viable. The costs, albeit prohibitive, for phosphorous recovery were found to be an order of magnitude lower than ammonia extraction. However, costs were found to be sensitive and critically dependent on ability to generate revenue from nutrient sales and the costs of chemicals and power. Considering the likelihood that the costs of both the chemicals and power required will increase in years to come, and the benefits from direct use of nutrients within treated biosolids, it is concluded that the extraction of these nutrients is unlikely to ever be financially nor environmentally sustainable in future years.

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“…The use of steam to volatilize ammonia from water is practiced at several industrial installations, but, for municipal wastewater sidestreams, the implementation of steam stripping has been limited, with the only performance data reported from pilot or demonstration-scale studies (Teichgräber and Stein, 1994;Gopalakrishnan et al, 2000). In the steam stripping process, low pressure steam increases the sidestream temperature above 95°C.…”

Section: Ammonia Recoverymentioning

confidence: 99%

Sustainable Wastewater Management: Energy and Nutrient Resource Recovery

Whitlock¹,

Datta²,

Erdal³

2011

proc water environ fed

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The intent of this paper is to delineate the technologies related to energy and nutrient recovery from wastewater treatment plants. Considering the process flow diagram of a typical wastewater treatment plant, these efforts focus on various areas that require specific attention to achieve the resource recovery goals. There are two broad categories of resource recovery; energy recovery and nutrient recovery, with focus on the liquid and solids treatment as follows: 1) Energy Recovery from Municipal Wastewater Treatment Plant a) Anaerobic Technologies for Biogas Recovery from Solids Stream b) Biogas-fueled Energy Recovery System c) Thermal Processing of Biosolids with Energy Recovery d) Energy Recovery from Liquid Stream 2) Nutrient Recovery from Municipal Wastewater Treatment Plants a) Phosphorus b) Ammonia c) Organic Carbon

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Design and Operational Considerations for Ammonia Removal From Centrate by Steam Stripping

Cited by 7 publications

References 0 publications

Minimal Bipolar Membrane Cell Configuration for Scaling Up Ammonium Recovery

Minimal Bipolar Membrane Cell Configuration for Scaling Up Ammonium Recovery

Resource Recovery Potential from Side-Streams: An Australian Study

Sustainable Wastewater Management: Energy and Nutrient Resource Recovery

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