A critical review of ammonia recovery from anaerobic digestate of organic wastes via stripping

Palakodeti, Advait; Azman, Samet; Rossi, Barbara; Dewil, Raf; Appels, Lise

doi:10.1016/j.rser.2021.110903

Cited by 65 publications

(31 citation statements)

References 98 publications

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“…This could happen if not only NH₄OH is formed in the trap, but some of the captured ammonia is also retained in solution as NH 3 (aq). Hence, the observed behavior may be tentatively explained by the high solubility of NH 3 in water due to its polarity: NH 3 forms hydrogen bonds with water molecules, which would be favored by the decrease in temperature [ 53 , 54 , 55 ]. Reducing the temperature of the NH 3 /NH 4 + solution increases the solubility of ammonia in water and changes the dynamic equilibrium between the two species at more basic pHs [ 56 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Acid Flow Rate, Membrane Surface Area, and Capture Solution on the Effectiveness of Suspended GPM Systems to Recover Ammonia

et al. 2021

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Ammonia losses from manure pose serious problems for ecosystems and human and animal health. Gas-permeable membranes (GPMs) constitute a promising approach to address the challenge of reducing farm ammonia emissions and to attain the EU’s Clean Air Package goals. In this study, the effect of NH3-N concentration, membrane surface area, acid flux, and type of capture solution on ammonia recovery was investigated for a suspended GPM system through three experiments, in which ammonia was released from a synthetic solution (NH4Cl + NaHCO3 + allylthiourea). The effect of two surface areas (81.7 and 163.4 cm2) was first evaluated using three different synthetic N emitting concentrations (3000, 6000, and 12,000 mg NH3-N∙L−1) and keeping the flow of acidic solution (1N H2SO4) constant (0.8 L·h−1). A direct relationship was found between the amount of NH3 captured and the NH3-N concentration in the N-emitting solution, and between the amount of NH3 captured and the membrane surface area at the two lowest concentrations. Nonetheless, the use of a larger membrane surface barely improved ammonia capture at the highest concentration, pointing to the existence of other limiting factors. Hence, ammonia capture was then studied using different acid flow rates (0.8, 1.3, 1.6, and 2.1 L∙h−1) at a fixed N emitting concentration of 6000 mg NH3-N∙L−1 and a surface area of 122.5 cm2. A higher acid flow rate (0.8–2.1 L∙h−1) resulted in a substantial increase in ammonia absorption, from 165 to 262 mg of NH3∙d−1 over a 14-day period. Taking the parameters that led to the best results in experiments 1 and 2, different types of ammonia capture solutions (H2SO4, water and carbonated water) were finally compared under refrigeration conditions (at 2 °C). A high NH3 recovery (81% in 7 days), comparable to that obtained with the H2SO4 solution (88%), was attained when chilled water was used as the capture solution. The presented results point to the need to carefully optimize the emitter concentration, flow rate, and type of capture solution to maximize the effectiveness of suspended GPM systems, and suggest that chilled water may be used as an alternative to conventional acidic solutions, with associated savings.

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Section: Resultsmentioning

confidence: 99%

Effect of Acid Flow Rate, Membrane Surface Area, and Capture Solution on the Effectiveness of Suspended GPM Systems to Recover Ammonia

et al. 2021

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“…Approaches for nitrogen recovery can be divided into physical, chemical, and biological processes (See supplementary file SI-2). Physical processes developed for nitrogen recovery include stripping [92], membrane distillation/separation [93], centrifugation/filtration [94], and physical adsorption/ion exchange [95][96][97]. Chemical processes for nitrogen recovery are mainly precipitation or electrochemical methods (e. g., electrochemical stripping and electrodialysis) [48,98].…”

Section: Common Approaches For Nitrogen/phosphorus Recoverymentioning

confidence: 99%

“…Most of the common nitrogen recovery approaches mentioned above have already been applied to recover nutrients from the liquid fraction of digestate. Typical, and most recent, attempts include stripping [92], chemical precipitation [110], adsorption [111], membrane separation [112], evaporation [113], and electrodialysis [114,115]. The comparison among these approaches is summarized in Table 2.…”

Section: Ad Digestate As a Nutrient-rich Sourcementioning

confidence: 99%

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From renewable energy to sustainable protein sources: Advancement, challenges, and future roadmaps

Khoshnevisan

et al. 2022

Renewable and Sustainable Energy Reviews

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“…Anaerobic digestion decreases the production amount of waste sludge which contributes to reduce the operating cost of wastewater treatment plant. Furthermore, when treating the municipal wastewater, anaerobic digestion significantly decreases the concentration of contaminants such as ammonia [3], chemical oxygen demand (COD) [4], sulfate [5], and phosphate [6]. Despite the numerous advantages of anaerobic digestion in producing energy and treatment wastewater, the practical application of the anaerobic digestion technology is still suffering from the low conversion efficiency of organic matter to methane gas.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Commercial and Synthesized Fe^0 particles on Methane Production Through the Anaerobic Digestion of Waste Sludge

Eljamal¹,

Maamoun²,

Bensaida³

et al. 2021

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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Anaerobic digestion (AD) is a well-established technology that converts organic wastes to produce renewable energy as methane gas. However, the low conversion efficiency of organic matter to methane gas is the main challenge for the practical application of this technology. Therefore, this article aims to demonstrate the effect of the addition of commercial and synthesized Fe 0 particles on methane gas production during the AD of waste sludge. Two set of experiments were conducted using two different waste sludges collected at different times from Fukuoka wastewater treatment plant in Japan. Different concentrations of commercial and synthesized iron particles were used in the anaerobic digesters ranged from 1 to 500 mg/L. The results should that the addition of the synthesized/Fe 0 particles to the anaerobic digesters improved methane production by 16% and 5% at using the first and second waste sludge, respectively. On the other hand, the addition of the commercial iron particles did not improve the production of methane gas.

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A critical review of ammonia recovery from anaerobic digestate of organic wastes via stripping

Cited by 65 publications

References 98 publications

Effect of Acid Flow Rate, Membrane Surface Area, and Capture Solution on the Effectiveness of Suspended GPM Systems to Recover Ammonia

Effect of Acid Flow Rate, Membrane Surface Area, and Capture Solution on the Effectiveness of Suspended GPM Systems to Recover Ammonia

From renewable energy to sustainable protein sources: Advancement, challenges, and future roadmaps

Investigating the Effect of Commercial and Synthesized Fe^0 particles on Methane Production Through the Anaerobic Digestion of Waste Sludge

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