Effective nitrogen removal in a two-stage partial nitritation-anammox reactor treating municipal wastewater – Piloting PN-MBBR/AMX-IFAS configuration

Kowalski, Maciej S.; Devlin, Tanner R.; Biase, Alessandro di; Oleszkiewicz, Jan A.

doi:10.1016/j.biortech.2019.121742

Cited by 51 publications

(17 citation statements)

References 31 publications

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“…Suppression of NOB by FA, as a promising strategy, was vigorously studied in the past years (van Hulle et al, 2010; Kent et al, 2019; Liu et al, 2019). For example, when DO/ammonia strategy turned out to be ineffective to limit the growth of NOB probably due to their K‐strategist nature (Liu & Yang, 2017) like those cultivated in this study, FA had to be employed (Kowalski et al, 2019a,2019b). However, these FA inhibition studies only lasted 70–250 days.…”

Section: Discussionmentioning

confidence: 96%

“…FNA is more suitable for nitrite‐rich wastewaters such as those in sidestream but not in mainstream applications (Law et al, 2015; Pedrouso et al, 2017). The DO/ammonia ratio control does not suppress K‐strategy NOB for their high affinity to DO (Liu & Yang, 2017); consequently, FA inhibition had to be resorted to (Kowalski, Devlin, di Biase, & Oleszkiewicz, 2019a,2019b). FA was found to selectively inhibit NOB but not AOB (Anthonisen, Loehr, Prakasam, & Srinath, 1976) and has been taken advantage for NOB suppression in a number of mainstream wastewater treatment researches (Cao et al, 2017; Kent, Sun, An, Bott, & Wang, 2019; Poot, Hoekstra, Geleijnse, van Loosdrecht, & Pérez, 2016), which is also believed to be the mechanism underpinning the intermittent aeration strategy (Ma, Domingo‐Félez, Plósz, & Smets, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Free ammonia resistance of nitrite‐oxidizing bacteria developed in aerobic granular sludge cultivated in continuous upflow airlift reactors performing partial nitritation

Kent²,

Sun

et al. 2020

Water Environment Research

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Free ammonia (FA) inhibition has been taken advantage as a strategy to suppress the growth of nitrite‐oxidizing bacteria (NOB) in aerobic granules stabilized in a continuous upflow airlift reactor to achieve partial nitritation. However, after nearly 18 months of continuous exposure of aerobic granules to FA in the reactor, the FA inhibition of NOB was proven ineffective, and the partial nitritation gradually shifted to partial nitrification even though the long‐term granule structural stability remained excellent under the continuous‐flow mode. The extent of NOB resistance to FA inhibition was quantified based on the kinetic response of NOB to various FA concentrations in the form of an uncompetitive inhibition coefficient. It was confirmed that the NOB immobilized in larger granules under longer term exposure to FA tend to become more resistant to FA. Thereby, it was concluded that NOB can develop strong resistance to FA after continuous exposure, and thus, FA inhibition is not a reliable strategy to achieve partial nitritation in mainstream wastewater treatment. Practitioner points Nitrifying aerobic granules can remain structurally stable in continuous‐flow bioreactors. NOB developed free ammonia resistance after 6‐month continuous exposure. Larger aerobic granules tended to develop stronger free ammonia resistance. Free ammonia inhibition is not a reliable strategy for mainstream anammox.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Free ammonia resistance of nitrite‐oxidizing bacteria developed in aerobic granular sludge cultivated in continuous upflow airlift reactors performing partial nitritation

Kent²,

Sun

et al. 2020

Water Environment Research

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“…Since the bottleneck to apply the PN-AMX process at mainstream conditions is the stability of the PN process, efforts have been recently focused on the evaluation of the two-stage configuration systems to carry out the PN and anammox processes separately (Jin et al, 2019;Kowalski et al, 2019). Using this approach, stable long-term PN was achieved by inhibiting NOB activity due to the presence of free nitrous acid (HNO 2 ) (Cui et al, 2019;Pedrouso et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

Limits of the anammox process in granular systems to remove nitrogen at low temperature and nitrogen concentration

Diaz

Belmonte

Campos

et al. 2020

Process Safety and Environmental Protection

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“…Biofilm thickness was photographed and calculated as a distance from the surface of the carrier to the top of the biofilm by a fluorescent Inverted microscope (Olympus, IX71). Biomass on the carriers was measured after scraping the biomass off by cotton swabs [18]. Statistical analyses (paired t-test) were performed using GraphPad Prism 8.0 software to identify the differences between each data sample, and detachment rates with a p-value less than 0.05 indicating significance.…”

Section: Methodsmentioning

confidence: 99%

A Highly Packed Biofilm Reactor with Cycle Cleaning for the Efficient Treatment of Rural Wastewater

Luan¹,

Qiu²,

Li³

et al. 2021

Water

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Biological treatment processes perform satisfactory in wastewater treatment, but the relatively high cost and complicated maintenance limit its application in rural areas. In this study, a highly packed biofilm reactor (HPBR), with a 90% packing ratio of carriers in the bioreactor, was designed for rural wastewater treatment. The results showed that the removal rates for chemical oxygen demand (COD) and ammonia were 3.04 ± 1.81 kg/m3/d and 0.49 ± 0.18 kg/m3/d, respectively. Besides, the removal efficiency of total inorganic nitrogen (TIN) was 35.4% by the HPBR. The removal capacity of the HPBR is higher than other reported systems with fewer operational costs and maintenance. High-throughput sequencing was applied to further investigate the kinetics and principals. Microorganisms capable of simultaneous nitrification-denitrification were found to be dominant species in the HPBR system, which indicated that the nitrogen removal in HPBR is governed by simultaneous nitrification-denitrification. These findings suggest that HPBR can be used as an efficient reactor for rural wastewater treatment, demonstrating its feasibility in real applications.

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Effective nitrogen removal in a two-stage partial nitritation-anammox reactor treating municipal wastewater – Piloting PN-MBBR/AMX-IFAS configuration

Cited by 51 publications

References 31 publications

Free ammonia resistance of nitrite‐oxidizing bacteria developed in aerobic granular sludge cultivated in continuous upflow airlift reactors performing partial nitritation

Free ammonia resistance of nitrite‐oxidizing bacteria developed in aerobic granular sludge cultivated in continuous upflow airlift reactors performing partial nitritation

Limits of the anammox process in granular systems to remove nitrogen at low temperature and nitrogen concentration

A Highly Packed Biofilm Reactor with Cycle Cleaning for the Efficient Treatment of Rural Wastewater

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