Effect of Moisture Profile and Noncombustible Matter in Recycled Paper-Mill Sludge on Energy Recovery

Brouillette, François; Sain, Mohini; Daneault, Claude

doi:10.1080/00102209808952087

Cited by 2 publications

(2 citation statements)

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“…The resulting hydrochar contained significant quantities of non-soluble ash (Fig. 2a), most likely in the form of calcium carbonate, kaolinite and quartz which are typically found from sludge residues within the pulp and paper industry [37,38]. Assuming CaO was present as calcium carbonate (CaCO 3 ), Al 2 O 3 as kaolinite (Al 2 Si 2 O 5 (OH) 4 ) and the remaining SiO 2 as quartz (SiO 2 ), the respective mineral phases constituted 46%, 15% and 8% of the original feed ash.…”

Section: Discussionmentioning

confidence: 99%

Hydrothermal carbonization of lignocellulosic biomass: Effect of process conditions on hydrochar properties

2015

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Section: Discussionmentioning

confidence: 99%

Hydrothermal carbonization of lignocellulosic biomass: Effect of process conditions on hydrochar properties

2015

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“…As mentioned above, the moisture content of paper sludge after partially dewatering is as high as 80% and it can't be incinerated without the use of co-fired fuel. The sludge drying process reduces both the mass and volume and results in dried sludge having greater stability, that is easier to store, transport, package and incinerate or co-incinerate [3] . It's commonly recommended that a profitable degree of drying is to about a 30-40% moisture content for dried sludge incineration [4] .…”

Section: Dried Paper Sludge and Residue Incinerationmentioning

confidence: 99%

Research on Feasibility of Different Incineration Systems for Paper Sludge

Zhang

Ma²,

Cai

2009

17th Annual North American Waste-to-Energy Conference

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A large amount of paper is recycled in China, that generates a significant amount of sludge and residue during the paper production process. Energy recovery by means of combustion in Waste-to-Energy (WTE) plants can be a possible candidate for sludge elimination. Currently, two incineration methods, distinguished as either direct incineration of partially dewatered sludge (generally 80% water content) or dried sludge incineration (dried to about 40% water content), are available. Research on comparison of fixed cost, operating cost and pollutant emissions between the two systems is presented. Fixed cost and steam consumption increase for the dried sludge incineration system though this method possesses many advantages, these include the decrease in consumption of auxiliary coal, service power and flue gas purificants. Moreover, main pollutant emission, such as SO2 and NOx, is significantly reduced. Chinese WTE managing regulations recommend no less than a 4:1 weight ratio of waste to auxiliary fuel fed into the incinerator. For a partially dewatered sludge direct incineration system, this weight ratio is about 5:1. However it reduces to 3.6:1 in a dried sludge incineration system. This is offset by a decrease in consumption of auxiliary coal and the overall weight ratio based on the entire plant increases to 7.5:1. The result suggests not only the technical and economic feasibility of a dried sludge incineration method, but also the feasibility of adopting the weight ratio of waste to auxiliary fuel based on entire WTE plant in the future regulation in China.

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Effect of Moisture Profile and Noncombustible Matter in Recycled Paper-Mill Sludge on Energy Recovery

Cited by 2 publications

References 1 publication

Hydrothermal carbonization of lignocellulosic biomass: Effect of process conditions on hydrochar properties

Hydrothermal carbonization of lignocellulosic biomass: Effect of process conditions on hydrochar properties

Research on Feasibility of Different Incineration Systems for Paper Sludge

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