Method to identify potential phosphorus rate-limiting conditions in post-denitrification biofilm reactors within systems designed for simultaneous low-level effluent nitrogen and phosphorus concentrations

Boltz, Joshua P.; Morgenroth, Eberhard; Daigger, Glen T.; deBarbadillo, C.; Murthy, Sudhir; Sørensen, K.; Stinson, Beverley

doi:10.1016/j.watres.2012.08.020

Cited by 23 publications

(7 citation statements)

References 39 publications

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“…Phosphate removal mechanisms PO 4 3− -P can be utilized as P source by microbes and the reported PO 4 3− -P requirement for denitrification was approximately 0.15 mg L −1 when influent NO 3 − -N concentration was in a range of 5-16 mg L −1 (Boltz et al 2012;Hunter 2003;Wang et al 2018;Yang et al 2016). The low PO 4 3− -P assimilation by microbials (0.15 mg L −1 ) and no detectable presence of phosphorus accumulating bacteria indicate that the biological adsorption did not contribute significantly to the PO 4 3− -P removal.…”

Section: Reaction Mechanisms and Processmentioning

confidence: 99%

Performance and mechanism of synchronous nitrate and phosphorus removal in constructed pyrite-based mixotrophic denitrification system from secondary effluent

Zhang

Huang

2020

Environ Sci Pollut Res

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The performance and process of the constructed pyrite-based mixotrophic denitrification (POMD) system using pyrite and residual organic matters as the co-electron donors were investigated for simultaneous removal of N and P from secondary effluent. After the batch experiments, 61.80 ± 3.26% of phosphate and 99.99 ± 0.01% of nitrate were removed, and the obtained nitrate removal rate constant can reach 2.09 days −1 in POMD system, which was significantly superior to that reported (0.95 day −1 ) in pyrite-based autotrophic denitrification (PAD) system. PO 4 3− -P removal was mainly achieved via chemical precipitation as FePO 4 with iron, and it was irrelevant with the initial nitrate and ammonium concentrations. High-throughput 16S rRNA gene sequencing analysis showed the coexistence of heterotrophic and autotrophic denitrifiers in the mixotrophic environment. The denitrification process could be divided into two stages according to the carbon balance and calculation of sulfate accumulation: (a) nitrate was mainly reduced heterotrophically during 12-36 h and (b) nitrate was reduced autotrophically after 36 h. The calculated proportion of heterotrophic denitrification was 58.17 ± 3.78%, which was promoted by a higher ammonium concentration. These findings are likely to be useful in understanding the mixotrophic denitrification process and developing a cost-effective technology to simultaneously remove N and P from secondary effluent.

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Section: Reaction Mechanisms and Processmentioning

confidence: 99%

Performance and mechanism of synchronous nitrate and phosphorus removal in constructed pyrite-based mixotrophic denitrification system from secondary effluent

Zhang

Huang

2020

Environ Sci Pollut Res

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“…Recent studies related to hybrid biofilms, such as moving bed biofilm reactors, biologically active filters, and integrated fixed-film activated sludge, sought to develop reinforced processes against low-concentration shock loads and prevent detachment of micro-organisms in biofilm [17][18][19].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Organic matter removal and nitrification using a woven hollow fiber tube as biological media

Ahn

Kim

2016

Desalination and Water Treatment

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A B S T R A C TAttached growth micro-organisms are known to be beneficial to the removal of lowconcentration organic matter because they can have a long retention time due to their very slow growth rate compared with the suspended growth micro-organisms suitable for high-concentration organic substance treatment. In this study, the characteristics of the treatment of organic and nitrogen pollutants in low concentrations were investigated by injecting air into the inside of the tube, using a woven-hollow fiber tube as biological media. According to the changes in the hydraulic retention time, the biochemical oxygen demand (BOD) concentrations of the influent and the treated water were 29.8-37.6 mg/L and 8.6-18.5 mg/L, respectively. The suspended solid (SS) of the influent was 33.9-36.7 mg/L, and that of the treated water was 1.6-3.6 mg/L, showing a high SS removal efficiency of more than 90%. The investigation of the BOD and the NH 4 + -N removal efficiency according to the surface loading rate revealed that the effects caused by the increase in the surface loading rate are greater in NH 4 + -N than in BOD. The attached growth micro-organisms decreased by detachment after 20 d, and increased again, securing a constant amount of growth micro-organisms.

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“…Howev-er, denitrification and dephosphatation of wastewater are often curbed by the concentration of the available organic compounds. Nevertheless, biofilm reactors have a vast potential for simultaneous and effective removal of nitrogen and phosphorus compounds from wastewater as a result of the likely co-occurrence of aerobic, anoxic and anaerobic conditions in one reactor [Boltz et al 2012, Gieseke et al 2002.…”

Section: Introductionmentioning

confidence: 99%

Effect of Acetic Acid on Denitrification and Dephosphatation Process Efficiencies in Sequencing Batch Biofilm Reactor

Mielcarek¹,

Rodziewicz²,

Janczukowicz³

et al. 2018

J. Ecol. Eng.

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This study investigates the feasibility of using an organic substrate in the form of acetic acid to enable wastewater denitrification in a Sequencing Batch Biofilm Reactor (SBBR). The impact of nitrates presence on the yield of biological dephosphatation was determined as well. The experiment included 296 cycles and was divided into 4 series differing in the load of nitrates. The N:(C and P) ratios were: 7:(140 and 7); 35:(140 and 7); 70:(140 and 7) and 140:(140 and 7). The hydraulic retention time in the reactor was 12h (6h of mixing-dissolved oxygen concentration below 0.1 and 6h of aeration-concentration of dissolved oxygen 3.0±0.8 mgO 2 •dm-3). The study demonstrated that the 30-day adaptation period (60 cycles) was sufficient for the development of a stable biofilm. The C:N ratio of 2 ensured the total nitrogen concentration in the effluent below 1 mgN•dm-3. The mean efficiency of biological dephosphatation reached 7.0, 17.4, 18.7, and 30.3% in series 1-4, respectively. In the case of series 2 and 3, no significant differences were demonstrated in the total phosphorus concentration in the effluent. In the other series, the differences turned out to be significant.

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Method to identify potential phosphorus rate-limiting conditions in post-denitrification biofilm reactors within systems designed for simultaneous low-level effluent nitrogen and phosphorus concentrations

Cited by 23 publications

References 39 publications

Performance and mechanism of synchronous nitrate and phosphorus removal in constructed pyrite-based mixotrophic denitrification system from secondary effluent

Performance and mechanism of synchronous nitrate and phosphorus removal in constructed pyrite-based mixotrophic denitrification system from secondary effluent

Organic matter removal and nitrification using a woven hollow fiber tube as biological media

Effect of Acetic Acid on Denitrification and Dephosphatation Process Efficiencies in Sequencing Batch Biofilm Reactor

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