scholarly journals Sewage sludge gasification process for clean and sustainable environment

2016 ◽  
Vol 1 ◽  
pp. 35 ◽  
Author(s):  
Sebastian Werle
Keyword(s):  
Sewage Sludge ◽  
Sustainable Environment ◽  
Gasification Process

Plasma Gasification: A Proven Technology

2008 ◽  
Author(s):  
Shyam V. Dighe
Keyword(s):  
Molecular Structure ◽  
Carbon Monoxide ◽  
High Temperature ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Hazardous Waste ◽  
Synthesis Gas ◽  
Plasma Gasification ◽  
Gasification Process ◽  
Environmentally Responsible

Plasma gasification is an efficient and environmentally responsible form of thermal treatment of wastes. In the plasma gasification process, extremely high temperature gases are used to break down the molecular structure of complex carboncontaining materials — such as municipal solid waste (MSW), tires, hazardous waste and sewage sludge — and convert them into synthesis gas (syngas) containing hydrogen and carbon monoxide that can be used to generate power or other sustainable sources of energy. Gasification occurs in an oxygen starved environment so the waste is gasified, not incinerated.

scholarly journals Mathematical modelling of gasification process of sewage sludge in reactor of negative CO2 emission power plant

Energy ◽  
2021 ◽  
pp. 122601
Author(s):  
Paweł Ziółkowski ◽  
Janusz Badur ◽  
Halina Pawlak- Kruczek ◽  
Kamil Stasiak ◽  
Milad Amiri ◽  
...  
Keyword(s):  
Power Plant ◽  
Sewage Sludge ◽  
Mathematical Modelling ◽  
Co2 Emission ◽  
Emission Power ◽  
Gasification Process

scholarly journals RDF (50% Sewage Sludge, 50% Plastics) Gasification Process Analysis

2017 ◽  
Vol 63 (2) ◽  
Author(s):  
Izabella Maj ◽  
Piotr Ostrowski ◽  
Sylwester Kalisz ◽  
Mateusz Wolniak
Keyword(s):  
Sewage Sludge ◽  
Process Analysis ◽  
Gasification Process

scholarly journals Evaluation of the possibility of the sewage sludge gasification gas use as a fuel

2016 ◽  
Vol 23 (2) ◽  
pp. 229-236 ◽  
Author(s):  
Sebastian Werle ◽  
Mariusz Dudziak
Keyword(s):  
Sewage Sludge ◽  
Gas Turbines ◽  
Burning Velocity ◽  
Combustion Process ◽  
Laminar Burning Velocity ◽  
Gas Combustion ◽  
Reducing Atmosphere ◽  
Gasification Process ◽  
Gas Utilization ◽  
Dioxins And Furans

Abstract Biomass is one of the major sources of energy that is estimated to contribute between 10% and 14% of the world’s energy supply. Over the past several years, many societies have established policy targets to increase their production of renewable energy from biomass. The thermo-chemical utilization of biomass includes 4 technologies: the most popular combustion and co-firing, and unconventional: pyrolysis and gasification. Gasification is considered to be the perspective technology because has many advantages in comparison to traditional process of combustion: (1) limited emission of the SO2, NOx, oxides of the heavy metals and no risk of the dioxins and furans emission due to reducing atmosphere in the gasification reactor, (2) volume of the gasification gas is smaller in comparison to flue gases from combustion due to the reducing atmosphere, (3) gasification process produce gas which is potential gaseous fuel in power engineering (engines, gas turbines and boilers) and chemistry. Unfortunately, composition of the gasification gas is always described as a variable. Moreover, it depends on the conditions of the process and quality of the base fuel. For this reason, the use of gasification gas can’t be very easy. For this reason, the knowledge of the basic properties of the gas is very important. Laminar burning velocity is assumed as an important quantity for in the process of the design equipment for the gas utilization. The numerical and experimental results of the laminar burning velocity of sewage sludge gasification gases were presented. Experimental Bunsen burner method was used. Cosilab 3© software for numerical analysis was used. GRI-Mech 3.0 mechanism of gas oxidation was implemented. As a result of the work, the set of the parameters where the sewage sludge gasification gas combustion process is stable with effective heat release, were presented.

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

Energies ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 175 ◽  
Author(s):  
Halina Pawlak-Kruczek ◽  
Mateusz Wnukowski ◽  
Lukasz Niedzwiecki ◽  
Michał Czerep ◽  
Mateusz Kowal ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Fossil Fuels ◽  
Fixed Bed ◽  
Electricity Consumption ◽  
Pilot Scale ◽  
Positive Influence ◽  
Steam Gasification ◽  
Gasification Process ◽  
Pilot Scale Reactor ◽  
Scale Reactor

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.

scholarly journals Studies on the Gasification Performance of Sludge Cake Pre-Treated by Hydrothermal Carbonization

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1442 ◽  
Author(s):  
Sang Yeop Lee ◽  
Se Won Park ◽  
Md Tanvir Alam ◽  
Yean Ouk Jeong ◽  
Yong-Chil Seo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Energy Recovery ◽  
Calorific Value ◽  
Hydrothermal Carbonization ◽  
Treatment Technique ◽  
Gasification Process ◽  
Cold Gas Efficiency ◽  
Sludge Cake ◽  
Gas Efficiency

Proper treatment and careful management of sewage sludge are essential because its disposal can lead to adverse environmental impacts such as public health hazards, as well as air, soil, and water pollution. Several efforts are being made currently not only to safely dispose of sewage sludge but also to utilize it as an energy source. Therefore, in this study, initiatives were taken to valorize sewage sludge cake by reducing the moisture content and increasing the calorific value by applying a hydrothermal treatment technique for efficient energy recovery. The sludge cake treated at 200 °C for 1 h was found to be the optimum condition for hydrothermal carbonization, as, in this condition, the caloric value of the treated sludge increased by 10% and the moisture content removed was 20 wt.%. To recover energy from the hydrothermally treated sludge, a gasification technology was applied at 900 °C. The results showed that the product gas from hydrothermally treated sludge cake had a higher lower heating value (0.98 MJ/Nm3) and higher cold gas efficiency (5.8%). Furthermore, compared with raw sludge cake, less tar was generated during the gasification of hydrothermally treated sludge cake. The removal efficiency was 28.2%. Overall results depict that hydrothermally treated sewage sludge cake could be a good source of energy recovery via the gasification process.

scholarly journals An Intensification of Biomass and Waste Char Gasification in a Gasifier

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1983
Author(s):  
Rolandas Paulauskas ◽  
Kęstutis Zakarauskas ◽  
Nerijus Striūgas
Keyword(s):  
Sewage Sludge ◽  
Co2 Concentration ◽  
Waste Utilization ◽  
Pyrolysis Gas ◽  
Char Gasification ◽  
Gasification Process ◽  
Gasification Rate ◽  
Wood Char ◽  
Flux Increase ◽  
Sewage Sludge Char

Gasification is considered a clean and effective way to convert low quality biomass to higher value gas and solve various waste utilization problems as well. However, only 80% of biomass is converted through thermal processes. The remaining part is char, which requires more time for conversion and in that case reduces the efficiency of gasifier. Seeking to optimize the process of gasification, this work focuses on the intensification of residual char gasification in a gasifier. For this purpose, three different types of char prepared from wood, sewage sludge and tire were examined under different conditions in a lab-scale gasification setup. Results showed that the air flux increase from 0.11 kg/(m2s) to 0.32 kg/(m2s) intensified the gasification process and the gasification rate increased from 0.8 to 2.61 g/min with the decrease of duration of wood char gasification by 72%. An additional introduction of pyrolysis gas into the char gasifier led to decreased bed temperatures, but the gasification rate increased from 0.8 to 1.25 g/min and from 2.61 g/min to 2.83 g/min, respectively, for the wood char and the sewage sludge char. Moreover, the use of pyrolysis gas coupled with air as the gasifying agent enhanced the composition of produced gas from char, and the CO2 concentration decreased by 1.68 vol% while the H2 concentration increased by 2.8 vol%.

scholarly journals THE GENERAL PRINCIPLES OF WASTE PROCESSING WITH RECOVERY OF THEIR ENERGY POTENTIAL ON THE BASIS OF PLASMA TECHNOLOGIES. PART III. COMPARATIVE ANALYSIS OF THE OXYGEN AND AIR BLOWING INFLUENCE AND THE ROLE OF CALORIFIC CONTENT OF SEWAGE SLUDGE

2018 ◽  
pp. 16-30
Author(s):  
V.A. Zhovtyansky ◽  
E.P. Kolesnikova ◽  
M.V. Yakymovych ◽  
P.A. Seredenko
Keyword(s):  
Sewage Sludge ◽  
Calorific Value ◽  
Waste Processing ◽  
Energy Potential ◽  
Gasification Process ◽  
Calorific Content ◽  
Air Blowing ◽  
The Enthalpy Of Formation ◽  
Plasma Technologies

The issues of determination calorific value as well as the enthalpy of formation of sewage sludge are deeply analyzed further to previous publications. Taking into account this analysis, the indicators, the indicators of the efficiency of the sewage sludge gasification process have been clarified and a comparison of the plasma-steam-oxygen and plasmasteamair gasification technologies has been made. At the same time, on the basis of previous studies, the influence on the efficiency indices of not only ballast nitrogen, but also nitrogen oxides is analyzed. Their concentrations cannot be determined on the basis of simple thermodynamic ratios. Bibl 38, Fig. 6, Tab. 1.

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