Biological Nutrient Removal

Wiesmann, Udo; Choi, In Su; Dombrowski, Eva‐Maria

doi:10.1002/9783527609604.ch10

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Numerous methods for the removal of nitrate are available, such as biological treatment (Wiesmann et al, 2006), electrodialysis (El Midaoui et al, 2001), reverse osmosis (H€ ayrynen et al, 2008), adsorption (Çengelo glu et al, 2006;Mishra and Patel, 2009), ion exchange (Ebrahimi and Roberts, 2013), and reduction by zerovalent iron (Su and Puls, 2004). In the past decade, growing interest in the utilization of biomass has induced extensive research on cheap lignocellulosic sorbents for the removal of nitrate.…”

Section: Introductionmentioning

confidence: 99%

“…Nitrate emissions originate typically from the use of explosives in mining. High concentrations of nitrate in drinking water cause significant problems for human health (methaemoglobinaemia, formation of carcinogens) (Fewtrell, 2004) and the environment through eutrophication (Wiesmann et al, 2006). Besides heavy metals, sulphate is a major contaminant in mining effluents causing salination of soil and waterways.…”

Section: Introductionmentioning

confidence: 99%

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Removal of nitrate by modified pine sawdust: Effects of temperature and co-existing anions

Keränen

Leiviskä

Hormi

et al. 2015

Journal of Environmental Management

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of nitrate by modified pine sawdust: Effects of temperature and co-existing anions

Keränen

Leiviskä

Hormi

et al. 2015

Journal of Environmental Management

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Effects of extremely low bulk liquid DO on autotrophic nitrogen removal performance and NOB suppression in side‐ and mainstream one‐stage PNA

Akaboci

Gich

Ruscalleda

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Results in the literature are divergent regarding dissolved oxygen (DO) level to ensure nitrite‐oxidizing bacteria (NOB) suppression in mainstream conditions. In this study, a one‐stage granular partial‐nitritation (PNA) was operated controlling the oxygen transfer over ammonium loading rate (OTR/ALR). The effects of extremely low DO availability on autotrophic nitrogen removal (ANR) performance and NOB suppression were assessed. RESULTS The strategy applied in the sequencing batch reactor (SBR) in sidestream and mainstream conditions (temperature at 25 °C) allowed micromolar bulk liquid DO concentrations to be obtained. Nitrite production rate (NPR) by aerobic ammonium‐oxidizing bacteria (AOB) was sufficient to provide nitrite to anammox bacteria (AnAOB) and sustain nitrogen removal rates (NRR) of 0.34 ± 0.05 and 0.37 ± 0.07 kg N m−3 d−1 during sidestream and mainstream operation, respectively. Extremely low DO assisted by free ammonia (FA; ≤6.2 mg N L−1) in sidestream conditions resulted in complete nitratation suppression. In mainstream conditions, Nitrospira spp. growth led to limited nitratation rates. Decreasing the OTR/ALR resulted in lower oxygen consumption by AOB than by NOB, as well as reduced nitrite consumption by AnAOB, which is likely to be due to granule structure. CONCLUSIONS Low DO availability did not compromise ANR. Micromolar DO allowed complete NOB suppression only with FA assistance (sidestream) but was sufficient to keep nitratation limited in mainstream conditions. © 2018 Society of Chemical Industry

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Biodegradation of Phosphorous in a Laboratory-scale Sequential Batch Reactor under Anoxic–Aerobic Conditions

Kundu

Debsarkar

Mukherjee

2014

Indian Chemical Engineer

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The present study describes the laboratory-scale evaluation of phosphorus removal uptake along with soluble chemical oxygen demand (COD) reduction in a sequencing batch reactor under anoxic-aerobic environment in sequence. The study includes the preparation of acclimatized seeds for phosphate removal and examining the effect of organic substrate like glucose and acetate on phosphate removal in different initial phosphate concentration under anoxic-aerobic conditions. Phosphorus removal efficiency was accelerated remarkably (24.83-88.19%) by the presence of readily biodegradable soluble COD in the form of acetate for an initial phosphate concentration of 10 mg/l as P during the anoxic-aerobic period. It was also observed that a change in sequence of the react phase from 5 h anoxic + 5 h aerobic to 4 h anoxic + 4 h aerobic + 2 h anoxic should be effective to produce marginal denitrified effluent at the end of the last 2.0 h of anoxic react phase.

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Biological Nutrient Removal

Cited by 4 publications

References 22 publications

Removal of nitrate by modified pine sawdust: Effects of temperature and co-existing anions

Removal of nitrate by modified pine sawdust: Effects of temperature and co-existing anions

Effects of extremely low bulk liquid DO on autotrophic nitrogen removal performance and NOB suppression in side‐ and mainstream one‐stage PNA

Biodegradation of Phosphorous in a Laboratory-scale Sequential Batch Reactor under Anoxic–Aerobic Conditions

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