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Ex-situ catalytic pyrolysis of wastewater sewage sludge – A micro-pyrolysis study
- Source :
- Bioresource Technology. 232:229-234
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Concerns over increasing amounts of sewage sludge and unsustainability of current disposal methods have led to development of alternative routes for sludge management. The large amount of organics in sewage sludge makes it potential feedstock for energy or fuel production via thermochemical pathways. In this study, ex-situ catalytic pyrolysis using HZSM-5 catalyst was explored for the production of olefinic and aromatic hydrocarbons and nutrient-rich char from sewage sludge. The optimal pyrolysis and catalysis temperatures were found to be 500°C and 600°C, respectively. Carbon yields of hydrocarbons from sewage sludge were higher than for lignocellulose; yield differences were attributed to the high extractives content in the sludge. Full recovery of most inorganic elements were found in the char, which suggests that catalyst deactivation maybe alleviated through ex-situ catalytic pyrolysis. Most of the nitrogen was retained in the char while 31.80% was released as ammonia, which suggests a potential for nitrogen recycling.
- Subjects :
- Hot Temperature
Environmental Engineering
Nitrogen
020209 energy
Sewage
Bioengineering
02 engineering and technology
Wastewater
010501 environmental sciences
Raw material
01 natural sciences
Catalysis
Waste Management
Biochar
0202 electrical engineering, electronic engineering, information engineering
Char
Waste Management and Disposal
0105 earth and related environmental sciences
Waste management
Renewable Energy, Sustainability and the Environment
business.industry
Chemistry
General Medicine
Pulp and paper industry
Microtechnology
business
Pyrolysis
Sludge
Waste disposal
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 232
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....7061ea8e53c59aff914aef19efe3ada3