Evaluation of sustainable scrubbing agents for ammonia recovery from anaerobic digestate

Jamaludin, Zamry; Rollings-Scattergood, Sasha; Lutes, Kevin; Vaneeckhaute, Céline

doi:10.1016/j.biortech.2018.09.007

Cited by 51 publications

(36 citation statements)

References 35 publications

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“…Finally, the fourth experimental set (D) aimed at using a by-product from an established resource recovery process in wastewater treatment plants as the alkaline rinse. As such, the alkaline rinse was a 1% w/w% NH 4 OH solution (pH 11.3) as may be recovered through ammonia stripping and scrubbing with water 28,29 . Similar to the previous experimental sets, the acid rinse used in this experimental set was tap water.…”

Section: Experimental Planning and Selection Of Regeneration Chemistriesmentioning

confidence: 99%

Phosphorus removal and recovery from wastewater via hybrid ion exchange nanotechnology: a study on sustainable regeneration chemistries

2021

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Technologies that allow for removal and subsequent recovery and reuse of phosphorus from polluted streams are imperative. One such technology is hybrid ion exchange nanotechnology (HIX-Nano), which may allow to produce a valuable nutrient solution following phosphorus desorption of the saturated media. This study evaluated the potential of four regeneration chemistries to desorb phosphorus from a commercially available HIX-Nano resin hybridized with iron oxide nanoparticles using a design of experiments (DoE) approach. More sustainable and less harmful regeneration solutions using a KOH/K2SO4 blend or a recovered NH4OH alkaline solution, along with tap water instead of synthetic acid, were compared to a control solution of KOH and H2SO4. Among the four regeneration methods studied, using the combination of recovered NH4OH and tap water shows the highest phosphorus recovery potential because: (i) it involves low cost and sustainable products, (ii) it showed a relatively high recovery efficiency (75 ± 15% as compared to the control at 89 ± 13%), and (iii) it did not demonstrate any significant dampening of the resin longevity after five adsorption and desorption cycles. Based on the DoE data, a series of regression models was developed to generate understanding of the effect of important operational parameters (volume of the regenerant solution, rinse speed, strength of the alkaline solution) on the phosphorus concentration in the recovered nutrient solution. Overall, this study indicates that HIX-Nano may contribute to providing a cost-effective and sustainable technological solution to tackle the phosphorus problem in wastewater treatment applications across the globe.

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Section: Experimental Planning and Selection Of Regeneration Chemistriesmentioning

confidence: 99%

Phosphorus removal and recovery from wastewater via hybrid ion exchange nanotechnology: a study on sustainable regeneration chemistries

2021

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“…Full-scale applications of NH3 stripping and absorption process have also been reported in different parts of the world. Jamaludin et al (2018) tested alternative scrubbing agents (chilled water, mineral salts and organic acids) for NH3 recovery, to avoid the use of sulfuric acid, normally restricted in small municipalities due to to safety and environmental concerns. They identified citric acid as the most sustainable and efficient scrubbing agent to obtain an organic biofertilizer (ammonium citrate) when reacting with the stripped NH3 gas.…”

Section: Ammonia Stripping and Absorptionmentioning

confidence: 99%

New frontiers from removal to recycling of nitrogen and phosphorus from wastewater in the Circular Economy

Robles

Aguado

Barat

et al. 2020

Bioresource Technology

169

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Nutrient recovery technologies are rapidly expanding due to the need for the appropriate recycling of key elements from waste resources in order to move towards a truly sustainable modern society based on the Circular Economy.Nutrient recycling is a promising strategy for reducing the depletion of non-renewable resources and the environmental impact linked to their extraction and manufacture. However, nutrient recovery technologies are not yet fully mature, as further research is needed to optimize process efficiency and enhance their commercial applicability. This paper reviews state-of-the-art of nutrient recovery, focusing on frontier technological advances and economic and environmental innovation perspectives. The potentials and limitations of different technologies are discussed, covering systems based on membranes, photosynthesis, crystallization and other physical and biological nutrient recovery systems (e.g. incineration, composting, stripping and absorption and enhanced biological phosphorus recovery).

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“…Popular recovered fertilizer types include ammonium sulfates and struvite (magnesium ammonium phosphates) 5 . Ammonium sulfate can be recovered through the stripping and subsequent scrubbing of ammonia from polluted water sources 6 , whereas struvite can be recovered through the precipitation and crystallization of phosphorus at increased pH 7 . Struvite could be classified as a slow release fertilizer rich in the macronutrients phosphorus (P), nitrogen (N), and magnesium (Mg), whereas ammonium sulfates could be classified as a liquid mineral fertilizer rich in the macronutrients nitrogen (N) and sulfur (S) 5 .…”

Section: Emerging Bio-fertilizer Productsmentioning

confidence: 99%

Integrating resource recovery process and watershed modelling to facilitate decision-making regarding bio-fertilizer production and application

Vaneeckhaute

2021

npj Clean Water

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Waste management strategies such as anaerobic digestion and composting produce bio-based fertilizer products that could be applied to agricultural soil. Although multiple modelling software tools are available to simulate the environmental effect of fertilizer application to the soil, these models do not allow specification of emerging bio-based fertilizer types. Moreover, mathematical process models exist that allow optimizing the operational settings of waste management processes in order to produce an optimal bio-fertilizer quality adjusted to the local market needs. If an integrated tool would be available that couples process modelling to watershed modelling, the valorization chain could be simulated as a whole, i.e. the bio-fertilizer type and composition could be adjusted to the local watershed and environmental impacts of bio-based fertilizer production and application could more easily be assessed and controlled. The availability of such integrated tool may as such allow for improved decision and policy making regarding bio-fertilizer production and application with environmental benefits as a result.

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Evaluation of sustainable scrubbing agents for ammonia recovery from anaerobic digestate

Cited by 51 publications

References 35 publications

Phosphorus removal and recovery from wastewater via hybrid ion exchange nanotechnology: a study on sustainable regeneration chemistries

Phosphorus removal and recovery from wastewater via hybrid ion exchange nanotechnology: a study on sustainable regeneration chemistries

New frontiers from removal to recycling of nitrogen and phosphorus from wastewater in the Circular Economy

Integrating resource recovery process and watershed modelling to facilitate decision-making regarding bio-fertilizer production and application

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