Workshop Summary: The Role of Modeling in Assessing Greenhouse Gas (GHG) Emissions

Shaw, Andrew; Coleman, P.; Nolasco, Daniel; Rosso, Diego; Zeng, Yuan; Loosdrecht, Mark C.M. van; Shiskowski, Dean M.; Chandran, Kartik; Houweling, Dwight; Willis, John; Beecher, Ned; Corominas, Li.; Siegrist, Hansruedi; Porro, José

doi:10.2175/193864710798158751

Cited by 9 publications

(7 citation statements)

References 1 publication

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“…Alarming rates of global warming and climate change have made it obligatory to quantify GHG emissions from every source. The sludge management accounts for 40% of the total GHG emissions from a WWTP [3,30].…”

Section: Introductionmentioning

confidence: 99%

Fenton pre-treatment of secondary sludge to enhance anaerobic digestion: Energy balance and greenhouse gas emissions

Pilli

Yan

et al. 2016

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Fenton pre-treatment of secondary sludge to enhance anaerobic digestion: Energy balance and greenhouse gas emissions

Pilli

Yan

et al. 2016

Chemical Engineering Journal

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“…A recent re-examination of initial estimates resulted in a greater than 100% increase in emissions of N 2 O and CH 4 . Biosolids treatment and end use can constitute up to 40% of total emissions associated with wastewater treatment . A range of different stabilization and end use technologies are widely available, each with different associated costs and environmental impacts , .…”

Section: Introductionmentioning

confidence: 99%

Calculator Tool for Determining Greenhouse Gas Emissions for Biosolids Processing and End Use

Brown

Beecher

Carpenter

2010

Environ. Sci. Technol.

138

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A greenhouse gas (GHG) calculator tool (Biosolids Emissions Assessment Model, BEAM) was developed for the Canadian Council of Ministers of the Environment to allow municipalities to estimate GHG emissions from biosolids management. The tool was developed using data from peer reviewed literature and municipalities. GHG emissions from biosolids processing through final end use/disposal were modeled. Emissions from nine existing programs in Canada were estimated using the model. The program that involved dewatering followed by combustion resulted in the highest GHG emissions (Mg CO(2)e 100 Mg(-1) biosolids (dry wt.). The programs that had digestion followed by land application resulted in the lowest emissions (-26 and -23 Mg CO(2)e 100 Mg(-1) biosolids (dry wt.). Transportation had relatively minor effects on overall emissions. The greatest areas of uncertainty in the model include N(2)O emissions from land application and biosolids processing. The model suggests that targeted use of biosolids and optimizing processes to avoid CH(4) and N(2)O emissions can result in significant GHG savings.

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“…In anaerobic digestion, organic matter of sludge is transformed into CH 4 , CO 2 and N 2 O 2 . In total, gasses produced in sludge treatment and disposal processes representent 40% of greenhouse gas emissions in wastewater treatment plants 3,4 . Enhancing methane production in anaerobic digestion of waste activated sludge harnesses greenhouse gas emissions and converts them to renewable energy 5 .…”

mentioning

confidence: 99%

Synergy of combined free nitrous acid and Fenton technology in enhancing anaerobic digestion of actual sewage waste activated sludge

Karimi

Hallaji

Siami

et al. 2020

Sci Rep

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in this study, actual swage waste activated sludge in batch reactors was employed to assess the synergistic effect of free nitrous acid and Fenton pre-treatments on enhancing methane production in the anaerobic digestion process. in addition to methane enhancement, the mechanisms driving the enhancement were also investigated via measuring enzymes activity and solubilisation of organic matter. This study revealed that the combined pre-treatments solubilised organic matter significantly more than the bioreactors pre-treated with individual FNA and Fenton. For understanding the influence of pre-treatments on solubilisation of organic matter, soluble protein, soluble polysaccharide and soluble chemical oxygen demand (ScoD) were measured before and after the treatments and it was shown that they respectively increased by 973%, 33% and 353% after the treatments. Protease and cellulase activity, as the key constituents of the microbial community in activated sludge, decreased considerably after the combined pre-treatments 42% and 32% respectively, which resulted in considerable methane enhancement. the results corroborate the synergy of the combined fnA and Fenton pre-treatment in degrading the organic and microbial constituents in waste activated sludge, paving the way for the big-scale implementation of these technologies.

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Workshop Summary: The Role of Modeling in Assessing Greenhouse Gas (GHG) Emissions

Cited by 9 publications

References 1 publication

Fenton pre-treatment of secondary sludge to enhance anaerobic digestion: Energy balance and greenhouse gas emissions

Fenton pre-treatment of secondary sludge to enhance anaerobic digestion: Energy balance and greenhouse gas emissions

Calculator Tool for Determining Greenhouse Gas Emissions for Biosolids Processing and End Use

Synergy of combined free nitrous acid and Fenton technology in enhancing anaerobic digestion of actual sewage waste activated sludge

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