A pilot-scale study on start-up and stable operation of mainstream partial nitrification-anammox biofilter process based on online pH-DO linkage control

Jiang, Hao; Li, Guohua; Ma, Yiming; Xu, Xianglong; Chen, Jinhui; Yang, Yanming; Liu, Xiuhong; Wang, Hongchen

doi:10.1016/j.cej.2018.06.007

Cited by 82 publications

(24 citation statements)

References 26 publications

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“…The accumulation peak of NO 2 − -N in filter R1 with the longest accumulation time was 0.24 mg/L. Jiang et al reported that the accumulation of NO 2 − -N in biofilters was related to the level of DO condition [ 24 ]. However, in this study, the influent DO of all the filters was almost the same, which could meet the oxygen demand of NH 4 + -N removal.…”

Section: Resultsmentioning

confidence: 99%

Study on the Factors Affecting the Start-Up of Iron-Manganese Co-Oxide Filters for Ammonium and Manganese Removal from Groundwater

Cheng

2018

IJERPH

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The high concentration of ammonium (NH4+-N) and manganese (Mn2+) in underground water poses a major problem for drinking water treatment plants. Effective catalytic oxidative removal of NH4+-N and Mn2+ by iron-manganese co-oxide film (MeOx) filters was first developed by our group in a previous study. In this study, several identical pilot-scale filters were employed to optimize the start-up process for simultaneous removal of NH4+-N and Mn2+ from potable water supplies. Experiments were conducted to assess the influence of Mn2+ concentration, Fe2+ concentration, filtration rate and dosing time on the start-up period of the filter. Results demonstrated that the ability of the filter to remove completely 1.5 mg/L NH4+-N could be achieved on the sixth day at the soonest and the removal of Mn2+ could reach 1 mg/L by the 18th day. Filter R3 feeding with 1 mg/L Fe2+, 2 mg/L Mn2+ and 3.5 mg/L MnO4− during the start-up period exhibited the optimum NH4+-N and Mn2+ removal effect. Short dosing time was not conducive to attaining full NH4+-N removal in filters, especially the activity of NO2−-N conversion to NO3−-N. The compositional analysis and element distribution analysis results demonstrated that there was an abundance of C, O, Mn, Mg, Fe, Ca and Si across the entire area of the surface of the filter media and the elemental distribution was homogeneous, which was different from the biofilter media. Knowledge-guided performance optimization of the active iron-manganese co-oxide could pave the way for its future technological use.

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Section: Resultsmentioning

confidence: 99%

Study on the Factors Affecting the Start-Up of Iron-Manganese Co-Oxide Filters for Ammonium and Manganese Removal from Groundwater

Cheng

2018

IJERPH

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“…Low influent C:N values (2-3 mg COD/mg TN) have been shown to prevent [38], but also promote [39][40][41] nitrite accumulation in different sludge systems. Other studies have reported nitrite accumulation at high (10 mg COD/mg NH4 + -N) [42] and also fluctuating influent C:N values (2.5-8 mg COD/mg NH4 + -N) [43,44]. Additionally, although adjustments in C:N also impact F:M values by altering the available carbon for heterotrophic growth, none of these studies accounted for covariations in F:M, and hence there is a knowledge gap about system performance when both factors are controlled simultaneously.…”

Section: Introductionmentioning

confidence: 89%

“…Increasing C:N molar ratios from 2 to 5 was shown to significantly reduce nitrification rates in a laboratory denitrification-nitrification system [71], although the study did not mention whether this caused nitrite accumulation. Moreover, nitrite accumulation was even reported for fluctuating low and high influent C:N values (2.5-8 mg COD/mg NH4 + -N) in two different pilot-scale studies using SBRs [43,44]. These multiple opposing findings in the literature imply that other factors in addition to C:N affect nitrification, which need to be accounted for.…”

Section: Importance Of Assessing F:m C:n and Srt Simultaneously For mentioning

confidence: 98%

Sustained organic loading disturbance favors nitrite accumulation in bioreactors with variable resistance, recovery and resilience of nitrification and nitrifiers

Santillan

Phua

Constancias

et al. 2019

Preprint

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15Sustained perturbations are relevant for environmental biotechnology as they can lead systems to 16 alternative stable states that may not be reversible. Studies assessing these concerns are scarce as 17 robust replication is required. Here, we tested the effect of sustained organic loading variations (food-18 to-biomass ratio, F:M; carbon-to-nitrogen ratio, C:N) on both structure and function of activated 19 sludge bacterial communities, focusing on nitrification and nitrifiers. Two sets of replicate 5-liter 20 sequencing batch reactors were operated at two different, low (n=4) and high (n=3), F:M (0.19-0.36 21 mgCOD/mgTSS/d) and C:N (3.5-6.3 mgCOD/mgTKN) conditions for a period of 74 days, following 22 53 days of sludge acclimation. The inoculum was taken from a full-scale treatment plant. Resilience 23 was tested during the last 14 days by operating all seven reactors at low F:M-C:N. Samples were 24 analyzed using metagenomics, 16S rRNA gene amplicon sequencing, and effluent characterization. 25

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“…However, it is still difficult to generate a stream with a suitable nitrite to ammonium ratio for mainstream anammox. Real time control based on on-line sensing of ammonium, nitrite, nitrate, pH, etc, has been proposed, but the whole system seemed highly complicated (Jiang et al, 2018;Langone et al, 2016;Regmi et al, 2015). To address these issues, an integrated process, called the A-2B process, was developed, as illustrated in Figure 3.16.…”

Section: Integrated Anaerobic and Two-stage Deammonification Process mentioning

confidence: 99%

Integrated A-B processes for municipal wastewater treatment

2020

A-B Processes: Towards Energy Self-Sufficient Municipal Wastewater Treatment

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Currently, the widely adopted conventional biological processes for municipal wastewater treatment are receiving increasing attention regarding their intensive energy consumption and huge amount of sludge production. However, significant improvements in energy efficiency are unlikely to be reached via further optimization of the conventional biological processes (Wan et al., 2016). Therefore, more effort should be dedicated to the development and adoption of innovative process configurations and emerging technologies for municipal wastewater treatment. In fact, chemical oxygen demand (COD) capture from municipal wastewater is critical to move towards direct energy recovery instead of biological oxidation of COD. In Chapter 2, novel technologies that are able to capture COD for energy recovery have been presented in detail. However, these technologies could not stand alone for municipal wastewater treatment due to their ineffectiveness in nitrogen removal. As such, processes for COD capture should be integrated with processes specially designed for energy-efficient nitrogen removal, and it is this configuration which has become known as the A-B process. In the A-B process, the A-stage is designed for the capture of COD for energy recovery instead of biological oxidation, whereas the B-stage is primarily dedicated to nutrient removal or recovery (Wan et al., 2016). As shown in Figure 3.1, there seem to be various combinations of the A-B process.

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A pilot-scale study on start-up and stable operation of mainstream partial nitrification-anammox biofilter process based on online pH-DO linkage control

Cited by 82 publications

References 26 publications

Study on the Factors Affecting the Start-Up of Iron-Manganese Co-Oxide Filters for Ammonium and Manganese Removal from Groundwater

Study on the Factors Affecting the Start-Up of Iron-Manganese Co-Oxide Filters for Ammonium and Manganese Removal from Groundwater

Sustained organic loading disturbance favors nitrite accumulation in bioreactors with variable resistance, recovery and resilience of nitrification and nitrifiers

Integrated A-B processes for municipal wastewater treatment

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