Factors that influence properties of FOG deposits and their formation in sewer collection systems

Iasmin, Mahbuba; Dean, Lisa L.; Lappi, Simon E.; Ducoste, Joel J.

doi:10.1016/j.watres.2013.11.012

Cited by 37 publications

(15 citation statements)

References 16 publications

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“…As in particular, palmitic acid has been shown to be involved in the formation mechanisms of FOG-deposits in sewers (He et al, 2011;Williams et al, 2012), Iasmin et al (2014) recommended selective removal of this oil in pre-treatment processes prior to any discharge of FOG-rich wastewater to sewers. Collection of FOG in jars distributed to individual households has been evaluated in field studies in Europe.…”

Section: Source Separation Of Fogmentioning

confidence: 99%

“…Studies carried out in the U.S have indicated that FOGdeposits essentially are composed of metallic soaps due to a saponification process involving calcium and free fatty acids (He et al, 2011;Keener et al, 2008). The most recent studies have largely supported these observations although they have also found greater diversification in compositional structure among FOGdeposits (He et al, 2013;Iasmin et al, 2014;Williams et al, 2012). As Western societal consumption patterns of diets rich in fats continues to increase during the 21st century (Food and Agriculture Organization of the United Nations, 2011), the fear among sewer managers that this would lead to increasing solids deposition in networks have been widespread (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater – A review

Mattsson

Hedström

Ashley

et al. 2015

Journal of Environmental Management

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Section: Source Separation Of Fogmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater – A review

Mattsson

Hedström

Ashley

et al. 2015

Journal of Environmental Management

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“…The issue of blockages (Iasmin et al, 2014), despite being better addressed by education, social policy nudges, and campaigns aimed at preventing people from abusing reticulated networks are not about to be solved in the foreseeable future. For drain and sewer owners and their maintenance contractors, highpressure water-jetting should not be the first resort upon detecting a blockage (Fairfield, 2010).…”

Section: Drain and Sewer Pipe-wall Materials Selectionmentioning

confidence: 99%

Cavitation erosion resistance of sewer pipe materials

Fairfield¹

2015

Proceedings of the Institution of Civil Engineers - Constructio

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A cavitating high-pressure water-jet provided the means by which a range of materials (plastics, clay and concrete) were eroded. The measured erosion resistance was a proxy for an initially unknown combination of other properties: strength, fracture toughness, impact resistance, hardness, surface roughness, and limiting service temperature. To ascertain the cause of damage to sewers during high-pressure water-jetting, information about which material properties contributed to the measured erosion resistance under a standard high-pressure water-jetting test were found. The experimental work, and published literature, provided a database of physico-mechanical, physicochemical, thermal and tribological material properties each of which in turn were correlated with the measured jetting resistance. The properties best correlated with the jetting resistance were: maximum service temperature (R 2 5 0?93), elastic modulus (R 2 5 0?90), surface roughness (R 2 5 0?89), density (R 2 5 0?87), and thermal conductivity (R 2 5 0?87).The correlation coefficient between jetting resistance and impact resistance (R 2 5 0?56) lay just outside the top 10, suggesting that this was not an impact problem but a more complex combination of strength, roughness, and heat dissipation despite actual failures ultimately resulting from fracture (for which toughness was nevertheless also poorly correlated (R 2 5 20?38)). Traditional mechanical wear, abrasion, and erosion resistance parameters (Taber abrasion (R 2 5 20?24), limiting pressure-velocity (R 2 5 20?57), and wear index (R 2 5 20?23)) failed to correlate with the jetting resistance.

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“…In addition, environmental and economic issues related to the improper disposal of ROF are a concern. Further, sewage treatment plants are subjected to increasing costs to treat ROF (Iasmin et al, 2014;Ortner et al, 2016). Among ROFs, waste frying oils are derived from various vegetable oils, such as sunflower, corn, and especially soybean oil (Jorge et al, 2005;Tsoutsos et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Extraction of Free Fatty Acids Applied to Biodiesel Production

Albuquerque

Cavalcanti

Soares

et al. 2018

Braz. J. Chem. Eng.

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The liquid-liquid extraction of free fatty acids (FFA) from residual oils and fats for biodiesel production, employing methanol as the solvent, has been optimized using process simulation and response surface methodology. The parameters investigated were temperature, number of stages and solvent-to-feed ratio (S/F). Responses evaluated were FFA mass fraction in the oil-rich phase (wFFA B ) and total cost, using yellow and brown greases as the raw materials. Quadratic and linear models were fitted for wFFA B and cost responses, respectively. The optimal conditions satisfying technical (wFFA B ≤ 0.5%) and economic (minimum cost, including capital and operation costs, except for raw material cost) criteria were 321 K, 6 stages, S/F = 1.27, wFFA B = 0.41%, cost = $84.93/ton (yellow grease), and 318 K, 6 stages, S/F = 1.32, wFFA B = 0.49%, cost = $102.89/ton (brown grease).

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Factors that influence properties of FOG deposits and their formation in sewer collection systems

Cited by 37 publications

References 16 publications

Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater – A review

Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater – A review

Cavitation erosion resistance of sewer pipe materials

Optimization of the Extraction of Free Fatty Acids Applied to Biodiesel Production

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