Combustion Characteristics of Sewage Sludge with Plant Waste in Fluidized Bed Incinerator with Turbocharger

Okamoto, Seiichiro; Sakurai, Kensuke; Miyamoto, Toyohisa; Ochi, Shuichi; Nagasawa, Hidekazu; Kihara, Hitoshi; Suzuki, Yoshishige

doi:10.2175/193864710802767696

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“…Grass has long been used as a principal livestock forage and is now drawing attention for its high potential in biogas production (Prochnow et al, 2009). Plant waste, such as grass waste and wood chips, can be collected from public spaces and used as supplementary fuels for sewage sludge incineration (Okamoto et al, 2009(Okamoto et al, , 2010. However, grass waste contains a higher moisture ratio and is not suitable for incineration.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Codigestion of Grass and Sewage Sludge: Laboratory Experiments and Feasibility Analysis

Hidaka

Wang

Sakurai

et al. 2016

Water Environment Research

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Grass is drawing attention for its high potential for biogas production. Anaerobic digesters in wastewater treatment plants can be used for producing biogas by processing grass without having to invest in the construction of new treatment facilities. Batch and continuous digestion experiments were conducted to assess the feasibility of codigestion of sewage sludge and grass. The focus was on a thermophilic condition, starting-up from existing mesophilic anaerobic digestion of sewage sludge only. The batch and continuous experiments used two different sewage sludges. Results demonstrated a methane generation of approximately 0.2 normal liter-methane/g volatile solids-grass. The addition of grass did not affect the ammonia concentration and improved the dewaterability of the digested sludge. The start-up performance from mesophilic digested sewage sludge to thermophilic codigestion with grass was confirmed. A feasibility analysis demonstrated that codigestion is applicable in terms of energy recovery and greenhouse gas emission, depending on the transport distance of grass.

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Section: Introductionmentioning

confidence: 99%