The role of influent organic carbon-to-nitrogen (COD/N) ratio in removal rates and shaping microbial ecology in soil aquifer treatment (SAT)

Friedman, Liron; Mamane, Hadas; Avisar, Dror; Chandran, Kartik

doi:10.1016/j.watres.2018.09.014

Cited by 17 publications

(13 citation statements)

References 44 publications

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“…We suggest that the typical low biodegradability of the organic carbon at the secondary effluent, which was also reflected in the low removal rate of the COD, BOD, and UVA254, mentioned earlier (Section 3.4, Figure A5a,b in the Appendix A) was a key parameter on the rates of heterotrophic activity [44].…”

Section: Denitrificationsupporting

confidence: 52%

“…With addition of H 2 O 2 , the ∆DOC, ∆UVA 254 and ∆COD increased to 2.3 ± 0.7 mg/L, 44 ± 7 1/m and 14.6 ± 4 mg/L, respectively, indicating additional organic carbon utilization by bacteria (Appendix A Figure A5: concentrations and the removal of DOC and UVA 254 over sampling campaigns before the biofilter and after the biofilter). The oxygen utilization, in favor of nitrification rather than carbon oxidation, reflects the low biodegradability of organic matter, which is typical for effluent post-secondary treatment with flocculation-filtration removal [41][42][43][44]. This is also supported by no removal of most trace organic compounds in the biofilter, besides Acesulfame and Iopromide that were removed by 60% and 30%, respectively [34].…”

Section: Organic Carbon Removal With H 2 O 2 Additionmentioning

confidence: 96%

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Stimulating Nitrogen Biokinetics with the Addition of Hydrogen Peroxide to Secondary Effluent Biofiltration

et al. 2020

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Tertiary wastewater treatment could provide a reliable source of water for reuse. Amongst these types of wastewater treatment, deep-bed filtration of secondary effluents can effectively remove particles and organic matter; however, NH4+ and NO2− are not easily removed. This study examined the feasibility of stimulating microbial activity using hydrogen peroxide (H2O2) as a bio-specific and clean oxygen source that leaves no residuals in the water and is advantageous upon aeration due to the solubility limitations of the oxygen. The performance of a pilot bio-filtration system at a filtration velocity of 5–6 m/h, was enhanced by the addition of H2O2 for particle, organic matter, NH4+, and NO2− removal. Hydrogen peroxide provided the oxygen demand for full nitrification. As a result, influent concentrations of 4.2 ± 2.5 mg/L N-NH4+ and 0.65 ± 0.4 mg/L N-NO2 were removed during the short hydraulic residence time (HRT). In comparison, filtration without H2O2 addition only removed up to 0.6 mg/L N-NH4+ and almost no N-NO2−. A DNA metagenome analysis of the functional genes of the media biomass reflected a significant potential for simultaneous nitrification and denitrification activity. It is hypothesized that the low biodegradability of the organic carbon and H2O2 addition stimulated oxygen utilization in favor of nitrification, followed by the enhancement of anoxic activity.

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Section: Denitrificationsupporting

confidence: 52%

Section: Organic Carbon Removal With H 2 O 2 Additionmentioning

confidence: 96%

Stimulating Nitrogen Biokinetics with the Addition of Hydrogen Peroxide to Secondary Effluent Biofiltration

et al. 2020

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“…Nitrolancea -like 16S rRNA gene sequences have only rarely been detected in specialized incubations of water or soil samples ( Sorokin et al, 2018 ). These include soil columns used for aquifer treatment ( Friedman et al, 2018 ), 1,3-dichloropropene fumigated soil ( Fang et al, 2019 ), and manure composting ( Zhang et al, 2016 ). A closely related 16S rRNA gene sequence (JN087902) has been detected in a SHARON (single reactor system for high activity ammonium removal over nitrite) reactor in Korea running at elevated temperature, a system with conditions comparable to the source of Nl.…”

Section: Introductionmentioning

confidence: 99%

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

et al. 2020

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“…For the effluent nutrient indices (Figure 4(b)), proportional TAN removal was positively related to nitrate concentration, because TAN was mainly oxidized to nitrate. TAN removal was also negatively related to effluent TCOD and DCOD because the excess effluent organic content inhibited nitrifier activity (Friedman et al 2018). The obvious positive correlation between TN/TIN removal and nitrite suggested that the ammonium removal path in the reactors might include short-cut nitrification and denitrification (Jiang et al 2020).…”

Section: Rda Analysis Between Performance and Effluent Characteristicsmentioning

confidence: 99%

Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment

Zhang

Chen

Yuan

et al. 2021

Water Practice and Technology

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Intensive aquaculture usually produces large volumes of nutrient-rich wastewater, which is essential to treat to avoid eutrophication. This study aimed to evaluate the performance of five, continuously aerated, biofilm reactors treating simulated, high-strength, aquaculture wastewater under different dissolved oxygen (DO) levels, and the effects of DO increments on simultaneous nitrification-denitrification (SND). Continuous aeration was beneficial to complete nitrification. Total inorganic nitrogen (TIN), principally ammonium, was mainly removed by SND. The SND rate response to different DO levels was fitted well by the power function of y = 54.81 + 371.58/(1 − 0.16*x)^(−1/0.24) (R2 = 0.897, P = 0.000). When the TIN was removed completely, the optimal SND rate was defined and corresponded to a value of 121.8%. Accordingly, the optimal DO concentration was calculated as 2.10 mg/L, close to the actual level of 1.83 mg/L, at which the highest proportional removals of total nitrogen (58.0%) and TIN (57.3%) were obtained. Phosphorus was also removed by denitrifying polyphosphate-accumulating organisms.

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The role of influent organic carbon-to-nitrogen (COD/N) ratio in removal rates and shaping microbial ecology in soil aquifer treatment (SAT)

Cited by 17 publications

References 44 publications

Stimulating Nitrogen Biokinetics with the Addition of Hydrogen Peroxide to Secondary Effluent Biofiltration

Stimulating Nitrogen Biokinetics with the Addition of Hydrogen Peroxide to Secondary Effluent Biofiltration

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment

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