Simultaneous online measurement of sulfide and nitrate in sewers for nitrate dosage optimisation

Gutiérrez, Oriol; Sutherland-Stacey, L.; Yuan, Zhiguo

doi:10.2166/wst.2010.901

Cited by 20 publications

(11 citation statements)

References 11 publications

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“…Dissolved sulfide in R1 and R3 was measured continuously by using an s::can spectro::lyser UV-visible (UV-Vis) spectrometer probe (Messtechnik GmbH, Austria) (28). For the analysis of dissolved sulfur species, 1.5 ml of wastewater was filtered through disposable Millipore filter units (0.22-m pore size) and added to 0.5 ml preserving solution antioxidant buffer (SAOB) (29).…”

Section: Methodsmentioning

confidence: 99%

Changes in Microbial Biofilm Communities during Colonization of Sewer Systems

Auguet

Pijuan

Batista

et al. 2015

Appl Environ Microbiol

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bThe coexistence of sulfate-reducing bacteria (SRB) and methanogenic archaea (MA) in anaerobic biofilms developed in sewer inner pipe surfaces favors the accumulation of sulfide (H 2 S) and methane (CH 4 ) as metabolic end products, causing severe impacts on sewerage systems. In this study, we investigated the time course of H 2 S and CH 4 production and emission rates during different stages of biofilm development in relation to changes in the composition of microbial biofilm communities. The study was carried out in a laboratory sewer pilot plant that mimics a full-scale anaerobic rising sewer using a combination of process data and ). This contrasting trend coincided with a stable SRB community and an archaeal community composed solely of methanogens derived from the human gut (i.e., Methanobrevibacter and Methanosphaera). In turn, CH 4 emissions increased after 1 year of biofilm growth (327.6 ؎ 16.6 mg COD-CH 4 liter ؊1 day ؊1 ), coinciding with the replacement of methanogenic colonizers by species more adapted to sewer conditions (i.e., Methanosaeta spp.). Our study provides data that confirm the capacity of our laboratory experimental system to mimic the functioning of full-scale sewers both microbiologically and operationally in terms of sulfide and methane production, gaining insight into the complex dynamics of key microbial groups during biofilm development. W astewater collection systems, or sewers, consist of an underground network of physical structures-installations composed of pipelines, pumping stations, manholes, and channels that convey wastewaters from their source to the discharge point, usually a wastewater treatment plant (WWTP). Sewer systems thus prevent the direct contact of urban populations to fecal material and potential microbial pathogens, greatly reducing the spread of infectious diseases. Sewers have traditionally been considered only hydraulic transport systems for sewage, although they are in fact "reactors" where complex physicochemical and microbial processes take place. Wastewater microorganisms are diverse and abundant, and they are exposed to a wide range of both inorganic and organic substrates as well as changing conditions along their transport through sewers (1). In this regard, wastewater transport through the pipes facilitates the formation of microbial biofilms that grow attached to the inner surface of sewer pipes (2). Different factors, such as large surface area, low flow velocity near pipe walls, and nutrient availability, may favor microbial colonization of pipe surfaces and biofilm growth. Formation of fully functional biofilms occurs in different steps, from surface conditioning, adhesion of microbial "colonizers," initial growth, and glycocalyx formation, followed by secondary colonization and growth (3).Anaerobic conditions in sewer pipes favor the accumulation of both sulfide (H 2 S) and methane (CH 4 ) as end products of different microbial metabolisms, i.e., anaerobic respiration of organic matter by sulfate-reducing bacteria (SRB) and methanogenic archae...

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Section: Methodsmentioning

confidence: 99%

Changes in Microbial Biofilm Communities during Colonization of Sewer Systems

Auguet

Pijuan

Batista

et al. 2015

Appl Environ Microbiol

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“…Dissolved sulfide and nitrate was simultaneously measured in continuous by means of an UVeVIS spectrometer probe s::can spectro::lyser (Messtechnik, GmbH, Austria) (Gutierrez et al, 2010b). Dissolved sulfur species (sulfate, sulfide, sulfite and thiosulfate) were measured offline via ion chromatography (IC) with a UV and conductivity detector (Dionex ICS-5000).…”

Section: Chemical Analysismentioning

confidence: 99%

“…The need for more cost-effective methods for H 2 S and CH 4 mitigation has led to the development of new nitrate dosing strategies based on improved dosage rates and dosing locations. For instance, Gutierrez et al (2010b) tested seven different nitrate dosing strategies in a laboratory-scale sewer system, providing strong support to H 2 S-control optimization. The results showed the benefits of adding nitrate at a point close to the end of the pipe, named Downstream Nitrate Dosage (DND).…”

Section: Introductionmentioning

confidence: 99%

Implications of Downstream Nitrate Dosage in anaerobic sewers to control sulfide and methane emissions

et al. 2015

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“…Recent development of the UV-vis spectroscopy technology allows the simultaneous monitoring of dissolved sulfide and nitrate [67,68]. Another sensor has been developed more recently, which is able to measure dissolved sulfide and dissolved methane simultaneously with the use of an automated stripping chamber and gas-phase hydrogen sulfide and methane sensors [69].…”

Section: Modelling and Monitoring Of Sewer Processes And Concrete Cormentioning

confidence: 99%