Ammonia harvesting via membrane gas extraction at moderately alkaline pH: A step toward net-profitable nitrogen recovery from domestic wastewater

Lee, Wooram; An, Seonyoung; Choi, Yongju

doi:10.1016/j.cej.2020.126662

Cited by 52 publications

(20 citation statements)

References 36 publications

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“…The differences in the availability and activity of the microorganisms indicate that there is a higher probability that the same raw materials and techniques used to produce the WRW may not produce common species as the ones isolated in this study. [76][77][78][79][80][81][82][83][84]. The fermented WRW nutrient concentrations are generally within the range of the reported values obtained in the domestic and municipal wastewater and palm oil mill effluent (POME).…”

Section: Identification and Characterization Of The Bacterial Strainssupporting

confidence: 74%

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

et al. 2021

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The wastewater from washed rice water (WRW) is often recommended as a source of plant nutrients in most Asian countries, even though most current research on WRW lack scientific rigor, particularly on the effects of rice washing intensity, volumetric water-to-rice ratio (W:R), and condition of the WRW before plant application. This research was thus carried out: (1) to determine how various rice washing intensities, fermentation periods (FP), and W:R would affect the nutrient content in WRW, and (2) to isolate, identify, and characterize the bacterial community from fermented WRW. The WRW was prepared at several rice washing intensities (50, 80, and 100 rpm), FP (0, 3, 6, and 9 days), and W:R (1:1, 3:1, and 6:1). The concentrations of all elements (except P, Mg, and Zn) and available N forms increased with increasing FP and W:R. Beneficial N-fixing and P- and K-solubilizing bacteria were additionally detected in WRW, which helped to increase the concentrations of these elements. Monovalent nutrients NH4+-N, NO3−-N, and K are soluble in water. Thus, they were easily leached out of the rice grains and why their concentrations increased with W:R. The bacteria population in WRW increased until 3 days of fermentation, then declined, possibly because there was an insufficient C content in WRW to be a source of energy for bacteria to support their prolonged growth. While C levels in WRW declined over time, total N levels increased then decreased after 3 days, where the latter was most possibly due to the denitrification and ammonification process, which had led to the increase in NH4+-N and NO3−-N. The optimum FP and W:R for high nutrient concentrations and bacterial population were found to be 3 to 9 days and 3:1 to 6:1, respectively. WRW contained nutrients and beneficial bacterial species to support plant growth.

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Section: Identification and Characterization Of The Bacterial Strainssupporting

confidence: 74%

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

et al. 2021

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“…Ammonia in wastewater could be from several sources, most importantly, human urea. A large proportion of ammonia produced by humans end up in the WWTPs ( Lee et al, 2021 ). Therefore, the association between increasing ammonia and increasing SARS-CoV-2 concentration could be attributed to increasing shedding of the viral particles by infected individuals in the connected populations.…”

Section: Discussionmentioning

confidence: 99%

Effect of selected wastewater characteristics on estimation of SARS-CoV-2 viral load in wastewater

Amoah

Abunama

Awolusi

et al. 2022

Environmental Research

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Wastewater-based epidemiology has been used as a tool for surveillance of COVID-19 infections. This approach is dependent on the detection and quantification of SARS-CoV-2 RNA in untreated/raw wastewater. However, the quantification of the viral RNA could be influenced by the physico-chemical properties of the wastewater. This study presents the first use of Adaptive Neuro-Fuzzy Inference System (ANFIS) to determine the potential impact of physico-chemical characteristics of wastewater on the detection and concentration of SARS-CoV-2 RNA in wastewater. Raw wastewater samples from four wastewater treatment plants were investigated over four months. The physico-chemical characteristics of the raw wastewater was recorded, and the SARS-CoV-2 RNA concentration determined via amplification with droplet digital polymerase chain reaction. The wastewater characteristics considered were chemical oxygen demand, flow rate, ammonia, pH, permanganate value, and total solids. The mean SARS-CoV-2 RNA concentrations ranged from 648.1(±514.6) copies/mL to 1441.0(±1977.8) copies/mL. Among the parameters assessed using the ANFIS model, ammonia and pH showed significant association with the concentration of SARS-CoV-2 RNA measured. Increasing ammonia concentration was associated with increasing viral RNA concentration and pH between 7.1 and 7.4 were associated with the highest SARS-CoV-2 concentration. Other parameters, such as total solids, were also observed to influence the viral RNA concentration, however, this observation was not consistent across all the wastewater treatment plants. The results from this study indicate the importance of incorporating wastewater characteristic assessment into wastewater-based epidemiology for a robust and accurate COVID-19 surveillance.

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“…R is the ideal gas constant (0.082 atm·m 3 kmol –1 K –1 ) and T is the temperature of the system (K). Henry’s law states the partial pressure of ammonia is proportional to its concentration in solution, which is significantly affected by the solution pH considering a p K a approximating to 9.25 …”

Section: Methodsmentioning

confidence: 99%

“…One of the most worthwhile N species to recover is ammonium (i.e., NH 4 + -N), which is the principal component of fertilizer existing in excreta and ultimately in water treatment facilities . NH 4 + -N recovery is not new and several processes are available like physicochemical processes (i.e., ammonia stripping, struvite precipitation, and reverse osmosis) − and microbial processes (i.e., assimilative uptake by algae) . Nevertheless, unsatisfactory gain output ratio is one key limitation toward NH 4 + -N recovery, with the obtained products struggling for the market share, and the recovery cost often exceeding the removal cost which is NH 4 + -N strength-dependent. , …”

Section: Introductionmentioning

confidence: 99%

“…While DD is an energy-free NH 4 + -N recovery technology, the economic value of the final product is limited because it is a mixture of NH 4 + and the driving cation (i.e., Na + ). Notably, high-purity product regarding NH 4 + -N recovery can be referred to membrane extraction process, where hydrophobic membrane barrier allows NH 3 to selectively penetrate and then to be captured as a purified NH 4 + salt solution. , Membrane based Osmotic Distillation (OD) is one such process which is often operated under isothermal conditions and driven by partial pressure (or concentration gradient) of the volatile solute, similar to membrane stripping. , Yet direct addition of alkali into the feed (toward converting ammonium to ammonia) would cause a series of concern including membrane fouling due to elevated alkalinity, and large consumption of alkali dose . It is assumed that such problems could possibly be avoided given that ammonium has been selectively enriched out of the complex matrix in the feed via process like DD.…”

Section: Introductionmentioning

confidence: 99%

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Donnan Dialysis-Osmotic Distillation (DD-OD) Hybrid Process for Selective Ammonium Recovery Driven by Waste Alkali

Chen

Han

Yao

et al. 2021

Environ. Sci. Technol.

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This work proposed an innovative and energy-efficient Donnan Dialysis (DD) and Osmotic Distillation (OD) hybrid process for alkali-driven ammonium recovery from wastewater. The efficiency and feasibility of ammonium removal and recovery from synthetic and real wastewater using NaOH and waste alkali were investigated. Ammonium in the feed first transported across the cation exchange membrane and accumulated in the receiver chamber. It is then deprotonated as ammonia, passing through the gas permeable membrane and finally is fixed as ammonium salt in the acid chamber. Our results indicated that employing waste alkali (red mud leachate) as driving solution led to excellent ammonium recovery performances (recovery efficiency of >80%), comparable to those of NaOH solution. When the initial ammonium concentration was 5 and 50 mM, the waste alkali driven DD-OD process achieved acceptable NH4 +-N flux density of 16.8 and 169 g N m–2 d–1, at energy cost as low as 8.38 and 2.06 kWh kg–1 N, respectively. Since this alkali driven DD-OD hybrid process is based on solute concentration (or partial pressure) gradient, it could be an energy-effective technology capable of treating wastewaters containing ammonium using waste alkali to realize nutrients recovery in a sustainable manner.

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Ammonia harvesting via membrane gas extraction at moderately alkaline pH: A step toward net-profitable nitrogen recovery from domestic wastewater

Cited by 52 publications

References 36 publications

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

Effect of selected wastewater characteristics on estimation of SARS-CoV-2 viral load in wastewater

Donnan Dialysis-Osmotic Distillation (DD-OD) Hybrid Process for Selective Ammonium Recovery Driven by Waste Alkali

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