A critical review of one-stage anammox processes for treating industrial wastewater: Optimization strategies based on key functional microorganisms

Li, Jianwei; Li, Jialin; Gao, Ruitao; Wang, Ming; Liu, Yang; Wang, Xiaoling; Zhang, Liang; Peng, Yongzhen

doi:10.1016/j.biortech.2018.07.013

Cited by 232 publications

(55 citation statements)

References 97 publications

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“…A high C/N ratio of influent water will stimulate the growth of HB on the surface of particles or biofilm, affect the mass transfer, limit the acquisition of oxygen by AOB and change the biofilm stratification [56]. Figure 5 reflects the competition between HB, AOB and AnAOB in the presence of COD which further illustrates that the C/N ratio of influent water is an important parameter for controlling the mainstream process [20]. NOB control is a major challenge for the mainstream PN/A process.…”

Section: Regulation Of Functional Bacteriamentioning

confidence: 98%

“…The most widely used process in an SBR is the DEMON process [19], which is characterized by controlling pH value and using a hydro cyclone to separate anammox bacteria. By adjusting the sludge retention time of AOB and AnAOB, slowly growing AnAOB bacteria are isolated to maintain the anaerobic flora [20]. Due to the high concentration of ammonia nitrogen in the anaerobic sludge digestion liquid and sludge dewatering liquid, the flow measurement anammox demo process was adopted in the Strass wastewater treatment plant in Austria [21].…”

Section: Sbrmentioning

confidence: 99%

“…With the development of MBBR research, a new process, single-stage deammonification process utilizing biofilms on moving carriers in a mixed reactor (ANITA Mox) [20], has been adopted in Malmö, Sweden. The patent method was used to control aeration, whereas the ratio of ammonium concentration, both in and out of water and nitrate production were used to control DO.…”

Section: Biofilm Reactormentioning

confidence: 99%

“…The patent method was used to control aeration, whereas the ratio of ammonium concentration, both in and out of water and nitrate production were used to control DO. Another process, integrated fixed membrane activated sludge (IFAS), adds a settler to the system, which improves the performance by 3-4 times [20]. The suspended sludge from the effluent accounts for 90% of the total aerobic AOB and has a higher biological turnover rate (sludge output) than pure biofilm [30].…”

Section: Biofilm Reactormentioning

confidence: 99%

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Application of the Anammox in China—A Review

Wen

Jin

Zhang

2020

IJERPH

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Anaerobic ammonia oxidation (anammox) has been one of the most innovative discoveries for the treatment of wastewater with high ammonia nitrogen concentrations. The process has significant advantages for energy saving and sludge reduction, also capital costs and greenhouse gases emissions are reduced. Recently, the use of anammox has rapidly become mainstream in China. This study reviews the engineering applications of the anammox process in China, including various anammox-based technologies, selection of anammox reactors and attempts to apply them to different wastewater treatment plants. This review discusses the control and implementation of stable reactor operation and analyzes challenges facing mainstream anammox applications. Finally, a unique and novel perspective on the development and application of anammox in China is presented.

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Section: Regulation Of Functional Bacteriamentioning

confidence: 98%

Section: Sbrmentioning

confidence: 99%

Section: Biofilm Reactormentioning

confidence: 99%

Section: Biofilm Reactormentioning

confidence: 99%

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Application of the Anammox in China—A Review

Wen

Jin

Zhang

2020

IJERPH

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“…Oxygen control is of particular importance when it comes to the operation of the PN/A process in a single reactor. Numerous studies implementing intermittent aeration strategies have however demonstrated that successful nitritation and anammox processes are possible under these conditions 28, 29 .…”

Section: Introductionmentioning

confidence: 99%

Temperature modulates stress response in anammox reactors

Niederdorfer

Hausherr

Palomo

et al. 2020

Preprint

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17Autotrophic nitrogen removal by anaerobic ammonium oxidizing (anammox) bacteria is an 18 energy-efficient nitrogen removal process in wastewater treatment. However, full-scale 19 deployment under mainstream conditions remains challenging for practitioners due to the high 20 stress susceptibility of anammox bacteria towards fluctuations in dissolved oxygen and 21 temperature. Here, we investigated the response of microbial biofilms with verified anammox 22 activity to oxygen shocks under favorable and cold temperature regimes. Genome-centric 23 metagenomics and metatranscriptomics were used to investigate the stress response on various 24 biological levels. We show that temperature regime and strength of oxygen perturbations 25 induced divergent responses from the process level down to the transcriptional profile of 26 individual taxa. Temperature induced distinct transcriptional states in compositionally identical 27 communities and transient pulses of dissolved oxygen resulted in the upregulation of stress-28 response only under favorable temperatures. Anammox species and other key biofilm taxa 29 display different transcriptional responses to the induced stress regimes.30 31Autotrophic nitrogen removal by biological anaerobic ammonium oxidation (anammox) is 33 increasingly implemented as an energy-efficient mechanism of fixed nitrogen elimination 34 during wastewater treatment. Deployed for mainstream wastewater treatment plants (WWTPs), 35 it may even permit operation under energy autarky 1 . In contrast to conventional nitrification- 36 denitrification system, external carbon sources are not required to reach very low effluent 37 nitrogen concentration, less aeration is needed and most of the organic load can be diverted for 38 valorization e.g. biogas or bio-plastics production [2][3][4] . Autotrophic N removal with anammox 39 involves the simultaneous oxidation of ammonium (NH4 + ) and reduction of nitrite (NO2 -) under 40 oxygen-limiting conditions 5 . In engineered systems aerobic ammonia-oxidizing bacteria (AOB) 41 oxidize a fraction of the available NH4 + to NO2 -(nitritation), which is subsequently used as a 42 terminal electron acceptor by anammox bacteria to oxidize the remaining NH4 + to N2 6 . The 43 process can be realized in single stage 7 or two-stage bioreactor systems 8 . Currently, autotrophic 44 N removal with anammox coupled to nitritation is already widely applied and represents a 45 robust method for the treatment of wastewaters with high N concentrations under mesophilic 46 conditions, e.g. effluents from anaerobic sludge digestion 9 . However, development of stable 47 anammox processes for mainstream municipal WWTPs suffers from unexplained process 48 instabilities due to unexpected fluctuation of environmental temperature and dissolved 49 oxygen 10-12 . 50 Anammox bacteria are characterized by very slow growth rates, low cell yields 13 , and a high 51 sensitivity to changing environmental conditions 14 . For their application in wastewater 52 treatment, they are grow...

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