Methane formation in sewer systems

Guisasola, Albert; Haas, David de; Keller, Jürg; Yuan, Zhiguo

doi:10.1016/j.watres.2007.10.014

Cited by 268 publications

(226 citation statements)

References 24 publications

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“…Similarly, this can happen for CH 4 . Although methanogenic activity in AS tanks is deemed to be insignificant (Gray et al 2002), dissolved CH 4 can enter aerobic AS reactors, where is stripped or biologically oxidized (Daelman et al 2012), from sewers (Guisasola et al 2008) or sections of the WWTPs where anaerobic conditions occur, e.g. in anaerobic selectors (Techobanoglous et al 2014;Wentzel et al 2008).…”

Section: Introductionmentioning

confidence: 99%

A Novel Comprehensive Procedure for Estimating Greenhouse Gas Emissions from Water Resource Recovery Facilities

Gori

Bellandi

Caretti

et al. 2017

Lecture Notes in Civil Engineering

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Abstract. The emissions of the major greenhouse gases (GHGs), i.e. carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) from water resource recovery facilities (WRRFs) are of increasing concern in the water industry. In order to produce useful and comparable information for monitoring, assessing, and reporting GHG emissions from WRRFs, there is a need for a generally accepted methodology for their quantification. This paper aims at proposing the first protocol for monitoring and accounting for GHG emissions from WRRFs, taking into account both direct and indirect internal emissions and focusing the attention on plant sections known to be primarily responsible for GHG emissions (i.e. oxidation tanks and sludge digestors). The main novelties of the proposed protocol are: (i) measurement of direct internal emissions ascribed to aeration devices; (ii) estimation of indirect internal emissions derived from field measurement; (iii) GHG emission offset due to biogas energy recovery quantified by monitoring biogas composition in case of anaerobic digestion. Finally, the proposed methodology enables and allows the gathering of useful information on plants (e.g. energetic efficiency of the aeration device system and composition of biogas produced in anaerobic digestion) to address potential strategies for improving the plants' performance.

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Section: Introductionmentioning

confidence: 99%

A Novel Comprehensive Procedure for Estimating Greenhouse Gas Emissions from Water Resource Recovery Facilities

Gori

Bellandi

Caretti

et al. 2017

Lecture Notes in Civil Engineering

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“…Hydrogen sulfide is a hazardous gas that causes corrosion and malodor problems [35]. Methane is a potent greenhouse gas and can contribute significantly to the carbon footprint of wastewater systems [36]. In practice, chemical dosing is used to oxidise or precipitate sulfide, to reduce liquid-gas sulfide transfer, or to reduce SRB and methanogenic activities thus minimising their production [37].…”

Section: Potential Applications Of Fna As a Biocidal Agent For Wastewmentioning

confidence: 99%

Producing free nitrous acid – A green and renewable biocidal agent – From anaerobic digester liquor

Law

Wang

et al. 2015

Chemical Engineering Journal

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101

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Recent studies have shown that free nitrous acid (FNA) at parts per million is strongly biocidal to a broad range of microorganisms involved in wastewater management. Applications have been developed, where FNA is used to deactivate anaerobic sewer biofilms thus suppressing sulfide and methane production in sewers, or to lyse secondary sludge resulting in reduced sludge production and enhanced biogas production. This study examines the feasibility of producing FNA from a waste stream namely the anaerobic sludge digestion liquor, thus providing a source of FNA for the above applications within wastewater systems. Complete nitritation was achieved in a lab scale sequencing batch reactor (SBR) treating reject wastewater. Under stable operation, the system sustained more than 90% conversion of the 1.0 and 0.8 g NH 4 + -N/L contained in the synthetic and real digester liquor, respectively, to nitrite. Each liter of this nitrite rich effluent 2 could be acidified to pH 2 with only 66 mmole of H + , due to the low level of alkalinity in the effluent. This converts almost all of the nitrite to FNA providing an ample source of FNA for sewer and sludge pretreatment applications. Despite the high nitrite concentration in the reactor, minimal N 2 O was produced with an emission factor of 0.08% of the ammonium nitrogen converted. Finally, an economical assessment of a theoretical full-scale installation for FNA production was conducted and compared with the costs of producing this FNA from a commercial nitrite supply.

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“…Methane emission from WWTP accounts methane emitted after entering to treatment plant, either it was generated in sewer system or produced after entering into the system (Daelman et al, 2012). The influent which enters to the WWTP has been reported to contain substantial amount of dissolved methane formed in the sewer system (Foley et al, 2009;Guisasola et al, 2008), however, actual quantities of methane generated in sewer system entering to WWTP has not been estimated yet. In WWTP methane production takes places in anaerobic zones, sludge thickeners, buffer and storage tanks.…”

Section: Emissions From Wastewatermentioning

confidence: 99%

A Study on Methane Emissions and Its Mitigation Strategies in Present Scenario

Kumar

Sachdev

Kumar

2016

SMSJ

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Methane is an important gas of earths environment. It emits from various naturally as well as anthropogenic sources and responsible for maintaining earths global temperature favorable for humans and other organisms to live. In recent years many activities of human development led to generation of a large volume of methane which has exhibited catastrophic effect on humans as well as animal lives on earth. Methane poses high global warming potential and has been found second most abounded gas in the environment responsible for global warming of earth after carbon dioxide which is well documented in gigantic body of literature. Methane emission is projected to reach 254 Gg/year by the year 2025. The sources of methane generation are scattered in nature that includes marshes, paddy crops, landfills and natural anaerobic decomposition of the organic matter present in the environment and digestion in ruminants as well handling and use of fossil fuels. The versatile sources of methane generation are uncontrolled and tough to be tamed. However, its emissions and negative effects could be reduced by effectively and efficiently managing its sources of emission and utilizing generated volume for energy production. This study emphasize on the harmful as well as beneficial aspects of the methane, its utilization and strategies to control emission from various sources.

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Methane formation in sewer systems

Cited by 268 publications

References 24 publications

A Novel Comprehensive Procedure for Estimating Greenhouse Gas Emissions from Water Resource Recovery Facilities

A Novel Comprehensive Procedure for Estimating Greenhouse Gas Emissions from Water Resource Recovery Facilities

Producing free nitrous acid – A green and renewable biocidal agent – From anaerobic digester liquor

A Study on Methane Emissions and Its Mitigation Strategies in Present Scenario

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