Novel Concept of an Installation for Sustainable Thermal Utilization of Sewage Sludge

Tic, W. J.; Guziałowska-Tic, Joanna; Pawlak–Kruczek, Halina; Woźnikowski, Eugeniusz; Zadorożny, Adam; Niedźwiecki, Łukasz; Wnukowski, Mateusz; Krochmalny, Krystian; Czerep, Michał; Ostrycharczyk, Michał; Baranowski, Marcin; Zgóra, Jacek; Kowal, Mateusz

doi:10.3390/en11040748

Cited by 22 publications

(17 citation statements)

References 45 publications

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“…On the other hand, the torrefaction experiment performed within the scope of this study was conducted on a pilot-scale device. This study, in essence, is a continuation of the previously published paper [65] containing the concept of a novel, fully sustainable installation for the thermal utilization of sewage sludge.…”

Section: Novelty Relevance Goals and Scope Of Workmentioning

confidence: 93%

“…Samples of the sewage sludge for the suite of torrefaction experiments were obtained after the process of their drying in a commercial-scale paddle dryer, already described in a different paper [65]. Samples of wet sewage sludge used for the drying tests were originally obtained after the fermentation and mechanical dewatering stages of the sewage treatment, performed at the sewage treatment plant in Brzeg Dolny.…”

Section: Methodsmentioning

confidence: 99%

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Torrefaction as a Valorization Method Used Prior to the Gasification of Sewage Sludge

et al. 2019

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The gasification and torrefaction of sewage sludge have the potential to make the thermal utilization of sewage sludge fully sustainable, thus limiting the use of expensive fossil fuels in the process. This includes sustainability in terms of electricity consumption. Although a great deal of work has been performed so far regarding the gasification of sewage sludge and some investigations have been performed in the area of its torrefaction, there is still a gap in terms of the influence of the torrefaction of the sewage sludge on its subsequent gasification. This study presents the results from the torrefaction tests, performed on a pilot scale reactor, as well as two consecutive steam gasification tests, performed in an allothermal fixed bed gasifier, in order to determine if torrefaction can be deemed as a primary method of the reduction of tar content for the producer gas, from the aforementioned gasification process. A comparative analysis is performed based on the results obtained during both tests, with special emphasis on the concentrations of condensable compounds (tars). The obtained results show that the torrefaction of sewage sludge, performed prior to gasification, can indeed have a positive influence on the gas quality. This is beneficial especially in terms of the content of heavy tars with melting points above 40 °C.

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Section: Novelty Relevance Goals and Scope Of Workmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Torrefaction as a Valorization Method Used Prior to the Gasification of Sewage Sludge

et al. 2019

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“…Most drying techniques involve the use of thermal energy which can be naturally sourced using solar energy or the use of conventional energy intensive dryers (convection, conduction and hybrid dryers). The use of multiple low temperature heat sources via condensing heat exchangers for staged heating was also investigated for maximising thermal energy usage and improving the efficiency of the energy recovery process [29]. Most natural methods would utilise aeration techniques which would still require some form of energy consumption as well as more time for the completion of drying.…”

Section: Pre-processing Of Sludgementioning

confidence: 99%

“…The use of nickel based catalyst have indicated high tar reduction and lower NOx formation, however the deactivation of such catalyst at high temperatures from coke deposition remains a challenge [131,135]. The integration of an intermediate torrefaction inter-stage between drying and gasification has been proposed for the removal of a fraction of Nitrogen content and minimisation of NOx emission generated from the subsequent use of the product stream (gases) from the gasifier [29]. Finally, the influence of the bed temperature on the distribution of yields, gas quality and process efficiency have been previously studied such that lower temperatures favour tar and char production while higher temperatures favour gas yield and overall efficiency of process [123,131,136].…”

Section: Gasificationmentioning

confidence: 99%

A Review of Sludge-to-Energy Recovery Methods

et al. 2018

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The increasing volume of sewage sludge from wastewater treatment facilities is becoming a prominent concern globally. The disposal of this sludge is particularly challenging and poses severe environmental hazards due to the high content of organic, toxic and heavy metal pollutants among its constituents. This study presents a simple review of four sewage to energy recovery routes (anaerobic digestion, combustion, pyrolysis and gasification) with emphasis on recent developments in research, as well as benefits and limitations of the technology for ensuring cost and environmentally viable sewage to energy pathway. This study focusses on the review of various commercially viable sludge conversion processes and technologies used for energy recovery from sewage sludge. This was done via in-depth process descriptions gathered from literatures and simplified schematic depiction of such energy recovery processes when utilised for sludge. Specifically, the impact of fuel properties and its effect on the recovery process were discussed to indicate the current challenges and recent scientific research undertaken to resolve these challenges and improve the operational, environmental and cost competitiveness of these technologies.

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“…Tic et al [184] proposed an innovative system for the sustainable utilization of sewage sludge. This waste mainly contains water and some organic matter, including microorganisms and various pollutants.…”

Section: Biomassmentioning

confidence: 99%

Recent Advances in the Analysis of Sustainable Energy Systems

et al. 2018

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EU energy policy is more and more promoting a resilient, efficient and sustainable energy system. Several agreements have been signed in the last few months that set ambitious goals in terms of energy efficiency and emission reductions and to reduce the energy consumption in buildings. These actions are expected to fulfill the goals negotiated at the Paris Agreement in 2015. The successful development of this ambitious energy policy needs to be supported by scientific knowledge: a huge effort must be made in order to develop more efficient energy conversion technologies based both on renewables and fossil fuels. Similarly, researchers are also expected to work on the integration of conventional and novel systems, also taking into account the needs for the management of the novel energy systems in terms of energy storage and devices management. Therefore, a multi-disciplinary approach is required in order to achieve these goals. To ensure that the scientists belonging to the different disciplines are aware of the scientific progress in the other research areas, specific Conferences are periodically organized. One of the most popular conferences in this area is the Sustainable Development of Energy, Water and Environment Systems (SDEWES) Series Conference. The 12th Sustainable Development of Energy, Water and Environment Systems Conference was recently held in Dubrovnik, Croatia. The present Special Issue of Energies, specifically dedicated to the 12th SDEWES Conference, is focused on five main fields: energy policy and energy efficiency in smart energy systems, polygeneration and district heating, advanced combustion techniques and fuels, biomass and building efficiency.

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Novel Concept of an Installation for Sustainable Thermal Utilization of Sewage Sludge

Cited by 22 publications

References 45 publications

Torrefaction as a Valorization Method Used Prior to the Gasification of Sewage Sludge

Torrefaction as a Valorization Method Used Prior to the Gasification of Sewage Sludge

A Review of Sludge-to-Energy Recovery Methods

Recent Advances in the Analysis of Sustainable Energy Systems

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