Performance improvement of a thermophilic sulfate-reducing bioreactor under acidogenic conditions: Effects of diversified operating strategies

Gil-Garcia, Carolina; Godoi, Leandro Augusto Gouvêa de; Fuess, Lucas Tadeu; Damianovic, Márcia Helena Rissato Zamariolli

doi:10.1016/j.jenvman.2017.11.043

Cited by 35 publications

(19 citation statements)

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“…Sulfate consumption of approximately 1.1 mg·L −1 ·s −1 occurred about 600-1000 μm below the biofilm-liquid interface. A previous study established a model to describe sulfate reduction activity in a wastewater biofilm [34], while other recent studies have evaluated the effects of diversified operating strategies and external factors on sulfate reduction activity [35,36]. Most of the current studies on sulfate reduction activity have been based on characteristic parameters in bulk water instead of within biofilm microenvironments.…”

Section: Estimation Of Consumption and Production Rate Of H2s And So4 2−mentioning

confidence: 99%

An Innovative in Situ Monitoring of Sulfate Reduction within a Wastewater Biofilm by H2S and SO42− Microsensors

Liu

Ding

2020

IJERPH

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Microelectrodes can be used to obtain chemical profiles within biofilm microenvironments. For example, sulfate (SO 4 2− ) and hydrogen sulfide (H 2 S) microelectrodes can be used to study sulfate reduction activity in this context. However, there is no SO 4 2− microelectrode available for studying sulfate reduction in biofilms. In this study, SO 4 2− and H 2 S microelectrodes were fabricated and applied in the measurement of a wastewater membrane-aerated biofilm (MAB) to investigate the in situ sulfate reduction activity. Both the SO 4 2− and H 2 S microelectrodes with a tip diameter of around 20 micrometers were successfully developed and displayed satisfying selectivity to SO 4 2− and H 2 S, respectively. The Nernstian slopes of calibration curves of the fabricated SO 4 2− electrodes were close to −28.1 mV/decade, and the R 2 values were greater than 98%. Within the selected concentration range from 10 −5 M (0.96 mg/L) to 10 −2 M (960 mg/L), the response of the SO 4 2− microelectrode was log-linearly related to its concentration. The successfully fabricated SO 4 2− microelectrode was combined with the existing H 2 S microelectrode and applied on an environmental wastewater biofilm sample to investigate the sulfate reduction activity within it. The H 2 S and SO 4 2− microelectrodes showed stable responses and good performance, and the decrease of SO 4 2− with an accompanying increased of H 2 S within the biofilm indicated the in situ sulfate reduction activity. The application of combined SO 4 2− and H 2 S microelectrodes in wastewater biofilms could amend the current understanding of sulfate reduction and sulfur oxidation within environmental biofilms based on only H 2 S microelectrodes.

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Section: Estimation Of Consumption and Production Rate Of H2s And So4 2−mentioning

confidence: 99%

An Innovative in Situ Monitoring of Sulfate Reduction within a Wastewater Biofilm by H2S and SO42− Microsensors

Liu

Ding

2020

IJERPH

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“…In order to avoid toxic effects on methanogenesis, application of a two-stage process has been suggested for a long time (Reis et al, 1988). This strategy has been applied under thermophilic conditions (Gil-Garcia et al, 2018;Lopes et al, 2007) and at various pH values (Demirel & Yenigün, 2002;Lopes et al, 2007), which suggests that it can be applied for different types of wastewaters. Moreover, biogas recirculation in an acidogenic reactor led to an enhancement of 70% of sulfide removal from the liquid phase (Gil- Garcia et al, 2018).…”

Section: Alleviating Sulfide Toxicitymentioning

confidence: 99%

“…It should be noted that different mechanisms for iron-aided sulfide toxicity alleviation have been proposed (Table 6.7): iron can be involved in sulfide oxidation to S 0 (De Smul & Verstraete, 1999b) or in chemical precipitation of iron sulfide (Godoi et al, 2017). Sulfate reduction is widely reported under thermophilic temperatures (Gil-Garcia et al, 2018;Kiyuna et al, 2017;Lopes et al, 2010;Siles et al, 2010;Visser et al, Table 6.7 Measures to reduce the reactor sulfide concentration, thus allowing the integration of methanogenesis and sulfate reduction (Continued). 1993b), and SRB respond better than MA when a bioreactor is submitted to temperature shocks (Visser et al, 1993b).…”

Section: Measure Referencementioning

confidence: 99%

“…1993b), and SRB respond better than MA when a bioreactor is submitted to temperature shocks (Visser et al, 1993b). Thermophilic conditions also favour sulfide stripping in multi-step anaerobic systems (Gil- Garcia et al, 2018). Nonetheless, H 2 S is highly soluble (.1000 mg H 2 S L −1 ) even at 80°C, indicating that at higher temperatures sulfide stripping from the liquid phase is insufficient for complete removal of H 2 S (Liu et al, 2018).…”

Section: Measure Referencementioning

confidence: 99%

“…Anaerobic treatment of sulfate-rich organic wastewater has focused on overcoming inhibition of methanogenesis. However, sulfate-reducers are versatile organisms, which can be applied in a wide range of temperature (Gil-Garcia et al, 2018;Lopes et al, 2007;Madden et al, 2014), pH (Sánchez-Andrea et al, 2015;Sousa et al, 2015), or salinity (Wei et al, 2018) conditions, enabling sulfate bio-based processes to be engineered for several purposes. This idea contributed to further research on the linkage of sulfur based biotechnologies with other biogeochemical cycles (Bhattarai et al, 2019;Hao et al, 2014;Qian et al, 2019).…”

Section: Downstream Processes For Biological Sulfate-reduction Effluentsmentioning

confidence: 99%

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Biological treatment of organic sulfate-rich wastewaters

Lens¹,

Omil²,

Lema³

et al. 2020

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering

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Many wastewaters have a high sulfate and organic carbon content, such as those generated by industrial processes that use sulfuric acid (fermentation industry), or sulfate-rich feedstocks (seafood processing industry). The use of sulfurous compounds less oxidized than sulfate in industrial processes, such as sulfide (tanneries, Kraft pulping), sulfite (sulfite pulping), or dithionite (pulp bleaching) also results in the generation of sulfate-rich wastewaters. Besides these organic wastewaters, some sulfate-rich effluents hardly contain any organic matter. These are generated during the leaching of sulfur-rich wastes (mine spoils and landfills, see Chapter 15) or during the scrubbing of sulfur-containing off-gases (see Lagas, 2000). Specific aspects of the treatment of these inorganic wastewaters are presented in Chapter 7. Aqueous sulfate emissions are generally considered safe. In humans, sulfate concentrations exceeding 500 mg L −1 can have laxative effects (US EPA, 1990), but the Drinking Water Standards of the U.S. Public Health Service proposed a maximum of 250 mg L −1 , based on aesthetic aspects. In the last decade, the water quality guidelines have included sulfur compounds in the protection of freshwater aquatic life. The Province of British Columbia (Canada), for instance, has set the maximum sulfate concentration between 128-429 mg L −1 (BC ME, 2013), depending on the water hardness (Elphick et al., 2011) to ensure aquatic life protection. This range was established based on toxicity assays with different

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Practical implications of methanotrophic denitrification as post‐treatment unit of anaerobic effluents in tropical areas

Costa

Okada

Foresti

2021

J of Chemical Tech & Biotech

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BACKGROUND The use of methane as electron donor for denitrification addresses nitrogen removal in anaerobic effluents and can help to abate greenhouse gas emissions from wastewater treatment plants. However, applicable rates of methanotrophic denitrification were only reached under temperature controlled conditions, and in membrane bioreactors, which are not widely available in low‐income countries. In this study, polyurethane foam was used as support media in an up‐flow fixed structured bed reactor (Up‐FSBR). Methane was provided as the sole electron donor and carbon source to the Up‐FSBR, fed with synthetic medium mimicking nitrified sewage pre‐treated anaerobically and operated without temperature control or previous medium sterilization. RESULTS The denitrification rate was 16.7 ± 6.9 mg N·day−1 and the average efficiency was 42.7 ± 14.6%. Data dispersion is linked to the operation conditions, such as temperature variation that ranged up to 18 °C in a 24 h period. The temperature variation caused a swallow in the metallic valves used in the methane input device, leading to a high fluctuation in methane availability and bubble size, influencing gas–liquid transfer. 16S rDNA sequencing revealed a complex interplay among aerobic methane oxidizers (10.8% of relative abundance), non‐methanotrophic methylotrophs (7.0% RA), heterotrophic denitrifiers (14.3% RA), and microorganisms affiliated with the archaeal Methanosarcinales (13.2%). CONCLUSIONS The Up‐FSBR is a promising alternative for methanotrophic denitrification. The operation challenges are linked with methane input rather than with the reactor configuration. The Up‐FSBR was efficient in selecting a microbial community that is capable of performing methane oxidation and heterotrophic denitrification. © 2021 Society of Chemical Industry (SCI).

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Performance improvement of a thermophilic sulfate-reducing bioreactor under acidogenic conditions: Effects of diversified operating strategies

Cited by 35 publications

References 48 publications

An Innovative in Situ Monitoring of Sulfate Reduction within a Wastewater Biofilm by H2S and SO42− Microsensors

An Innovative in Situ Monitoring of Sulfate Reduction within a Wastewater Biofilm by H2S and SO42− Microsensors

Biological treatment of organic sulfate-rich wastewaters

Practical implications of methanotrophic denitrification as post‐treatment unit of anaerobic effluents in tropical areas

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