Nitrogen removal and intentional nitrous oxide production from reject water in a coupled nitritation/nitrous denitritation system under real feed-stream conditions

Weißbach, M.; Thiel, Paul; Drewes, Jörg E.; Koch, Konrad

doi:10.1016/j.biortech.2018.01.080

Cited by 36 publications

(9 citation statements)

References 34 publications

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“…7) (Gao et al 2014). CANDO's first application in real wastewater feed streams was reported by Weißbach et al (2018) to investigate the performance and dynamics of nitrogen removal and N 2 O production. A 93% conversion of ammonium to nitrite could be maintained for adapted seed sludge in the first step of nitrification (nitritation).…”

Section: Coupled Aerobic-anoxic Nitrous Decomposition Oxidation Processmentioning

confidence: 99%

Achieving energy neutrality in wastewater treatment plants through energy savings and enhancing renewable energy production

Maktabifard

Zaborowska

Mąkinia

2018

Rev Environ Sci Biotechnol

227

106

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Wastewater treatment plants (WWTPs) consume high amounts of energy which is mostly purchased from the grid. During the past years, many ongoing measures have taken place to analyze the possible solutions for both reducing the energy consumption and increasing the renewable energy production in the plants. This review contains all possible aspects which may assist to move towards energy neutrality in WWTPs. The sources of energy in wastewater were introduced and different indicators to express the energy consumption were discussed with examples of the operating WWTPs worldwide. Furthermore, the pathways for energy consumption reductions were reviewed including the operational strategies and the novel technological upgrades of the wastewater treatment processes. Then the methods of recovering the potential energy hidden in wastewater were described along with application of renewable energies in WWTPs. The available assessment methods, which may help in analyzing and comparing WWTPs in terms of energy and greenhouse gas emissions were introduced. Eventually, successful case studies on energy self-sufficiency of WWTPs were listed and the innovative projects in this area were presented.

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Section: Coupled Aerobic-anoxic Nitrous Decomposition Oxidation Processmentioning

confidence: 99%

Achieving energy neutrality in wastewater treatment plants through energy savings and enhancing renewable energy production

Maktabifard

Zaborowska

Mąkinia

2018

Rev Environ Sci Biotechnol

227

106

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“…Recently, biological production and harvesting of N 2 O gas for energy recovery and reduction of high nitrogen loads in digestate centrate was performed by coupled aerobicanoxic nitrous decomposition operation (CANDO). Combustion of N 2 O with biogas increases energy yields and reduces the emission of the potent greenhouse gas (Weißbach et al 2018).…”

Section: Urban Wastewatermentioning

confidence: 99%

A review of nature-based solutions for resource recovery in cities

Kisser¹,

Wirth²,

Gusseme

et al. 2020

Blue-Green Systems

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Our modern cities are resource sinks designed on the current linear economic model which recovers very little of the original input. As the current model is not sustainable, a viable solution is to recover and reuse parts of the input. In this context, resource recovery using nature-based solutions (NBS) is gaining popularity worldwide. In this specific review, we focus on NBS as technologies that bring nature into cities and those that are derived from nature, using (micro)organisms as principal agents, provided they enable resource recovery. The findings presented in this work are based on an extensive literature review, as well as on original results of recent innovation projects across Europe. The case studies were collected by participants of the COST Action Circular City, which includes a portfolio of more than 92 projects. The present review article focuses on urban wastewater, industrial wastewater, municipal solid waste and gaseous effluents, the recoverable products (e.g., nutrients, nanoparticles, energy), as well as the implications of source-separation and circularity by design. The analysis also includes assessment of the maturity of different technologies (technology readiness level) and the barriers that need to be overcome to accelerate the transition to resilient, self-sustainable cities of the future.

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“…The CANDO process was further assessed under technically more realistic conditions. Weißbach et al used real municipal wastewater as the COD source for a laboratory nitrous denitritation reactor. The reactor, which was seeded with conventional activated sludge, achieved a conversion of 70% of NO 2 – to N 2 O over a five-month demonstration period, which is statistically similar to the yield attained by using acetate (78 ± 5%) .…”

Section: Current Status Of N2o Recovery Researchmentioning

confidence: 99%

“…The recent pilot trial also identified that the external acetate addition contributes significantly to the operational cost . Using real wastewater is more feasible in full-scale applications to reduce the operational cost and proved to be viable with the primary effluent . However, stable operation with real wastewater is challenging due to the relatively low COD concentrations in real wastewater of only ∼400 mg of COD/L and the fact that not all COD is readily available.…”

Section: Challenges and Perspectives For N2o Utilizationmentioning

confidence: 99%

“…In WWTPs, there has been an intense research focus over the past 15 years on mitigating N 2 O emissions. ,, However, an increasing number of studies have explored the energy potential of N 2 O from wastewater under engineered conditions. − New perspectives in which N 2 O could be regarded as the end product for the biological nitrogen removal process and potentially used as a fuel additive to achieve energy neutral or even energy positive wastewater treatment services have emerged.…”

Section: Introductionmentioning

confidence: 99%

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Recovery of Nitrous Oxide from Wastewater Treatment: Current Status and Perspectives

Duan¹,

Zhao²,

Koch

et al. 2020

ACS EST Water

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Nitrous oxide (N 2 O) has been studied intensively in wastewater treatment as a detrimental greenhouse gas. However, increasingly more studies have adopted a contrasting objective, recovering N 2 O from wastewater as an energy resource. This article critically reviewed and analyzed the current status of N 2 O recovery research in wastewater treatment, to identify knowledge gaps and guide future research. Overall, N 2 O recovery is a promising research direction while still in active development. At present, unstable nitritation, the low energy potential, and potential environmental risks of N 2 O harvesting render the recovery of N 2 O from mainstream wastewater technically and economically challenging. High-strength wastewater treatment is more favorable for N 2 O recovery due to the high energy potential, established nitritation approaches, and significant carbon/aeration savings. The coupled aerobic−anoxic nitrous decomposition operation (CANDO) process is currently the most investigated and promising N 2 O recovery process. Nevertheless, more research is needed for its implementation on a large scale. Research opportunities for the CANDO process have been identified in this paper. Meanwhile, N 2 O recovery via autotrophic denitritation is a more recent concept, with limited studies hitherto. More experiments are needed to investigate its technological feasibility. Furthermore, other novel N 2 O recovery processes, e.g., truncated denitrification and chemical oxidation, should also be explored to facilitate the recovery of N 2 O from wastewater.

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Nitrogen removal and intentional nitrous oxide production from reject water in a coupled nitritation/nitrous denitritation system under real feed-stream conditions

Cited by 36 publications

References 34 publications

Achieving energy neutrality in wastewater treatment plants through energy savings and enhancing renewable energy production

Achieving energy neutrality in wastewater treatment plants through energy savings and enhancing renewable energy production

A review of nature-based solutions for resource recovery in cities

Recovery of Nitrous Oxide from Wastewater Treatment: Current Status and Perspectives

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