Nitrogen removal as nitrous oxide for energy recovery: Increased process stability and high nitrous yields at short hydraulic residence times

Wang, Zhi Yue; Woo, Sung Geun; Yao, Yinuo; Cheng, Hai; Wu, Yi; Criddle, Craig S.

doi:10.1016/j.watres.2020.115575

Cited by 24 publications

(26 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A step further is the recycling of wastewater produced on site . This approach can include urine recovery through separation and treatment at the source , and processes for converting carbon and nitrogen into energy. , Wastewater can be treated to different levels to tailor water quality to the proposed end use ranging from nonpotable to potable water reuse quality. While membrane technologies offer a robust treatment platform, additional technological challenges, including the need for sensors that monitor water quality and smart control systems for autonomous water treatment at the building scale, need to be resolved and/or addressed to minimize public health risks.…”

Section: Applications Across Spatial Scalesmentioning

confidence: 99%

Net Zero Urban Water from Concept to Applications: Integrating Natural, Built, and Social Systems for Responsive and Adaptive Solutions

et al. 2020

View full text Add to dashboard Cite

Innovation in urban water systems is required to address drivers of change across natural, built, and social systems, including climate change, economic development, and aged infrastructure. Water systems are complex socio-technical systems that interact with biophysical systems to supply and reclaim water. We present a vision for enhancing urban water system resilience through a net zero urban water (NZUW) approach, which meets the needs of a given community with a locally available and sustainable water supply, without detriment to interconnected systems or long-term water supply. NZUW is an integrative approach with progressive targets assessed using a quantitative framework to expand adaptive and responsive solutions for urban water self-sufficiency. Decision makers can use NZUW to understand trade-offs between future interventions to urban water systems across spatial and temporal scales. We present the overall NZUW approach, drivers of change, applications, and research gaps.

show abstract

Section: Applications Across Spatial Scalesmentioning

confidence: 99%

Net Zero Urban Water from Concept to Applications: Integrating Natural, Built, and Social Systems for Responsive and Adaptive Solutions

et al. 2020

View full text Add to dashboard Cite

show abstract

“…To further evaluate the stability and optimization of the process, Wang et al carried out the first pilot-scale test using an SBR with a 1.5 m 3 working volume. The pilot-scale nitrous denitritation reactor was fed with an acetate stock solution (4.5 g of COD/L) and effluent from nitritation reactor-treated real digester reject water (∼1.1 g of NO 2 – -N/L).…”

Section: Current Status Of N2o Recovery Researchmentioning

confidence: 99%

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

Duan¹,

Zhao²,

Koch

et al. 2020

ACS EST Water

View full text Add to dashboard Cite

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.

show abstract

“…Microbial processes play an integral role in the removal of organic carbon and nutrients. 6–8 The prevailing technology first developed at the turn of the 20th century is activated sludge, a process that has since been modified to enable nutrient removal. Many emerging technologies cannot cross the “Valley of Death” because they treat tiny flows (in many cases, just milliliters per day) while adoption in practical applications may require treatment of tens of millions of liters per day.…”

Section: Introductionmentioning

confidence: 99%

CFD-accelerated bioreactor optimization: reducing the hydrodynamic parameter space

Yao

Fringer

Criddle

2022

Environ. Sci.: Water Res. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

Nitrogen removal as nitrous oxide for energy recovery: Increased process stability and high nitrous yields at short hydraulic residence times

Cited by 24 publications

References 38 publications

Net Zero Urban Water from Concept to Applications: Integrating Natural, Built, and Social Systems for Responsive and Adaptive Solutions

Net Zero Urban Water from Concept to Applications: Integrating Natural, Built, and Social Systems for Responsive and Adaptive Solutions

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

CFD-accelerated bioreactor optimization: reducing the hydrodynamic parameter space

Contact Info

Product

Resources

About