Biological nitrate removal using a food waste-derived carbon source in synthetic wastewater and real sewage

Zhang, Haowei; Jiang, Jianguo; Li, Menglu; Yan, Feng; Gong, Changxiu; Wang, Quan

doi:10.1016/j.jenvman.2015.10.037

Cited by 43 publications

(11 citation statements)

References 30 publications

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“…During the anoxic phase in Test 2 when acetate was dosed in the anaerobic phase, 1.28 mg PO 4 -P was consumed to reduce 1 mg NO 3 -N. These values remain in the range of the reported ratios of 0.60–1.31 mg.mg −1 in the EBPR processes with acetate or propionate as a sole EOCS [41–44]. In the present study, acclimated to fusel oil-biomass was characterized by a similar value, i.e., 1.11 mg PO 4 -P/1 mg NO 3 -N. For Test 3, with non-acclimated biomass when fusel oil was added in both phases, the consumption of PO 4 -P to reduce 1 mg NO 3 -N was similar with the result obtained in the reference test (0.34 mg PO 4 -P vs. 0.31 mg PO 4 -P).…”

Section: Resultsmentioning

confidence: 82%

The metabolic activity of denitrifying microorganisms accumulating polyphosphate in response to addition of fusel oil

Tuszyńska

Kaszubowska

Kowal

et al. 2018

Bioprocess Biosyst Eng

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The effect of distillery waste product (fusel oil) as an alternative external organic carbon source (EOCS) was investigated in terms of the metabolic properties of denitrifying polyphosphate accumulating organisms (DPAOs). Samples of the non-acclimated biomass were collected from a local full-scale wastewater treatment plant employing A2/O type bioreactors. The acclimated biomass was obtained after cultivation (with fusel oil added) in a bench-scale reactor with a process configuration similar to the full-scale bioreactor. Changes in the functional properties of the biomass were investigated by measuring the phosphate release/uptake rates (PRRs and PURs), and nitrate utilization rates (NURs) with fusel oil in anaerobic-anoxic batch tests. Furthermore, a validated extended Activated Sludge Model no 2d (ASM2d) was used as a supporting tool to analyze the experimental results and estimate the contribution of DPAOs to the overall denitrification. In the non-acclimated biomass with fusel oil, the PRRs, PURs and NURs were low and close to the rates obtained in a reference test without adding EOCS. With the acclimated biomass, the PUR and NUR increased significantly, i.e., 3.5 and 2.7 times, respectively. In the non-acclimated biomass, approximately 60.0 ± 3.6% and 20.0 ± 2.2% of the total NUR was attributed to the utilization of endogenous carbon and examined EOCS, respectively. The remaining portion (20% of the total NUR) was attributed to PHA utilization (linked to PO4-P uptake) by DPAOs. With the acclimated biomass, the contribution of the EOCS to the NUR increased to approximately 60%, while the contribution of the endogenous carbon source decreased accordingly. Very accurate predictions of PURs and NURs (R2 = 0.97–1.00) were obtained with the extended ASM2d. Based on model simulations, it was estimated that the activity of DPAOs and denitrifying ordinary heterotrophic organisms corresponded to approximately 20% and 80% of the total NUR, respectively.Electronic supplementary materialThe online version of this article (10.1007/s00449-018-2022-0) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 82%

The metabolic activity of denitrifying microorganisms accumulating polyphosphate in response to addition of fusel oil

Tuszyńska

Kaszubowska

Kowal

et al. 2018

Bioprocess Biosyst Eng

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“…15 Traditionally produced from petroleum, VFAs are valuable precursors for pharmaceutical, petrochemical, food, and cosmetic industry applications. 16 In addition, dilute VFAs have been used for wastewater denitrification, 17 bioplastic synthesis, 18 chain elongation to medium chain carboxylic acids, 19 and microbial lipid production. 20 Despite the economic promise of VFA production through AD rewiring, their separation and recovery from mixed constituents such as microbes, salts, and solid particulates remains a major challenge.…”

Section: Introductionmentioning

confidence: 99%

Will Membranes Break Barriers on Volatile Fatty Acid Recovery from Anaerobic Digestion?

et al. 2020

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The conversion of organic waste into value-added chemicals provides a sustainable pathway toward a circular economy, but anaerobic digestion (AD) as an established technology has faced great challenges primarily due to the low value of its primary productbiogas. Recent developments on arrested methanogenesis allow the AD process to be rewired to suppress methanogenesis and promote the production of higher valued volatile fatty acids (VFAs). However, the separation and recovery of VFAs from the mixed reactor constituents (microbes, salt, and organic solids), remains a challenge. Membrane-based separation processes are showing increased promise compared to other methods, as recent studies reported high yield, high selectivity VFA recovery with low energy consumption and reactor footprint. However, competing membrane processes have not been quantitatively reviewed or compared, making it difficult to understand the current state-of-the-art. This study provided the first such analysis, comparing nanofiltration (NF), reverse osmosis (RO), pervaporation (PV), membrane contactors (MC), and membrane distillation (MD) for VFA separation and recovery. The study offers a comprehensive characterization of the different membrane’s selectivity and permeability under different conditions and compares them side-by-side using normalized measures. In addition, the energy demand and fouling potential were also analyzed. New opportunities such as mixed matrix pervaporation membrane, antifouling electroactive membrane, solar-heating membrane distillation, and integrated processes were also explored to provide insights on technology advancement and synergistic benefits.

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“…However, the cost of carbon addition is typically high (Zhang et al, 2016) and the process needs regulation to prevent over-or under-dosing of the liquid carbon sources (Rocher et al, 2015). Solid carbon sources can provide a cost-effective alternative to the classical carbon sources mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Enhanced nitrogen removal of low carbon wastewater in denitrification bioreactors by utilizing industrial waste toward circular economy

Kiani

Kujala

Pulkkinen

et al. 2020

Journal of Cleaner Production

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Biological nitrate removal using a food waste-derived carbon source in synthetic wastewater and real sewage

Cited by 43 publications

References 30 publications

The metabolic activity of denitrifying microorganisms accumulating polyphosphate in response to addition of fusel oil

The metabolic activity of denitrifying microorganisms accumulating polyphosphate in response to addition of fusel oil

Will Membranes Break Barriers on Volatile Fatty Acid Recovery from Anaerobic Digestion?

Enhanced nitrogen removal of low carbon wastewater in denitrification bioreactors by utilizing industrial waste toward circular economy

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