Comparison of Gasification, Pyrolysis and Incineration Technologies for Residuals Management: Future of Advanced Biosolids Processes

Yurtsever, Deniz; Rowan, James; Santha, Hari

doi:10.2175/193864709793846484

Cited by 4 publications

(4 citation statements)

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“…The operating parameters influencing the yield and properties of the products formed include fuel type, temperature, heating rate, pressure, moisture content, and reaction time (residence time) (Yurtsever et al, 2009). Depending on the temperature and reaction time, pyrolysis can be categorised into fast, intermediate and slow pyrolysis.…”

Section: Pyrolysismentioning

confidence: 99%

Energy Recovery from Biosolids and Biomass A Review of Thermal Conversion Technologies

Polo¹,

Qi²,

Zhao³

et al. 2012

proc water environ fed

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Melbourne Water investigated a broad variety of biosolids reuse options, including energy, fuel, chemical, nutrient, and metal recovery and reuse; use of biosolids as a geotechnical fill or building material extender; and for carbon sequestration. This paper focuses on those technologies capable of recovering energy, fuels, or non-nutrient chemicals from biosolids. Recognizing the higher energy content of other feedstocks and the potential benefits from taking advantage of capital installations' economies of scale, Melbourne Water also considered receiving foreign biomass at a potential future energy recovery plant, and hauling their biosolids to off-site facilities. Technologies investigated ranged from the most established, with hundreds of installations, to the most embryonic, that have only been tested in university laboratories. Maturity, scale, feedstock suitability, costs of facilities and market conditions for products were identified for each technology.

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Section: Pyrolysismentioning

confidence: 99%

Energy Recovery from Biosolids and Biomass A Review of Thermal Conversion Technologies

Polo¹,

Qi²,

Zhao³

et al. 2012

proc water environ fed

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“…However, with thermal drying and the energy requirements for the gasifier, approximately 90 percent of the total energy recovered from the process is used internally (Yurtsever et al, 2009). Biosolids, which typically have a heat value of 10,000 Btu/lb of volatile solids, would need to have a dry solids content of approximately 50 percent to meet the 4,000 Btu/lb (wet) feed requirement.…”

Section: Gasificationmentioning

confidence: 99%

The Case for the Biodegradation Pathway

Santha¹,

Shimp²,

Yurtsever³

et al. 2010

proc water environ fed

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With rising energy costs and concerns over global warming, sustainable treatment with a reduced carbon footprint is fast becoming the goal of major wastewater treatment utilities. Sustainability goals are driving the industry to take on the challenge of transforming wastewater treatment from an energy-consuming and waste-producing activity to one with positive net energy production and minimal residuals. Raw wastewater contains ten times the energy needed to treat it (Shizas and Bagley, 2004). However, most of the soluble organic compounds that contribute to the measured energy are mineralized to carbon dioxide or synthesized into new cell matter during treatment. The remaining energy is recoverable from biosolids either as steam or waste heat following thermal processes or as a methane-rich gas following anaerobic digestion. To be able to recover energy from biosolids for meeting energy needs onsite or for electricity generation and to displace the fossil-based energy used is very central to the theme of sustainability. Methods of energy recovery from biosolids are at more advanced stages of development than technologies for energy recovery from the liquid stream. This paper provides an overview of some of the newer thermal conversion technologies and their potential for energy recovery in comparison with the conventional anaerobic digestion pathway.

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“…The growing production of biosolids alongside increasing concerns about its beneficial use in agriculture as well as availability of agricultural land in close proximity to wastewater treatment plants is mounting pressure on wastewater industries to find alternative solutions for biosolids management and reuse. Numerous technologies such as incineration, gasification, pyrolysis, hydrothermal processing, and brick making have been considered . These technologies have several advantages.…”

Section: Introductionmentioning

confidence: 99%

Transformation of biosolids to biochar: A case study

Patel

Kundu

Paz‐Ferreiro

et al. 2018

Env Prog and Sustain Energy

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This case study examines the feasibility of the production of biochar from biosolids using energy neutral pyrolysis process using ASPEN Plus process modeling followed by a detailed techno‐economic assessment. The modeling exercise demonstrated that the pyrolysis can be energy neutral with moisture content in biosolids as high as 50 wt.%. In the case of moisture content lower than 50%, surplus energy will be available which can be converted to electrical energy; generating additional revenue. Further analysis on the effect of pyrolysis temperature on surplus energy available revealed that surplus energy increased when pyrolysis temperature reached from 450 to 650°C, but it gradually decreased above 650°C. The techno‐economics analysis suggested that biosolids management cost and biochar sale price were the most critical sensitivity factors while capital and operating costs of the pyrolysis unit seemed to be less critical. The positive Net Present Value values in scenario modeling suggest that the conversion of biosolids to biochar using energy neutral pyrolysis process looks promising and is techno‐economically feasible for most of the studied scenarios. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13113, 2019

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Comparison of Gasification, Pyrolysis and Incineration Technologies for Residuals Management: Future of Advanced Biosolids Processes

Cited by 4 publications

References 0 publications

Energy Recovery from Biosolids and Biomass A Review of Thermal Conversion Technologies

Energy Recovery from Biosolids and Biomass A Review of Thermal Conversion Technologies

The Case for the Biodegradation Pathway

Transformation of biosolids to biochar: A case study

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