Devolatilisation and Combustion Characteristics of Sewage Sludge in a Bubbling Fluidized Bed Furnace

Werther, Joachim; Ogada, T.; Borodulya, V. A.; Dikalenko, V. I.

doi:10.1016/b978-0-902597-49-5.50017-2

Cited by 17 publications

(13 citation statements)

References 2 publications

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“…Sludge weight losses were divided into five stages based on temperature and according to the TG curves: 40-175°C, 175-300°C, 300-400°C, 400-600°C, and 600-850°C. The first stage is often attributed to water volatilization (Werther et al, 1995;Zhao et al, 2013), and the weight losses in the first stage were 5.01-9.42% here. However, the moisture contents of the samples were only 1.4-3.2% (Table 2).…”

Section: Tga Of Sludgementioning

confidence: 99%

Consequences of sludge composition on combustion performance derived from thermogravimetry analysis

Xiao

Wang

et al. 2015

Waste Management

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a b s t r a c tWastewater treatment plants produce millions of tons of sewage sludge. Sewage sludge is recognized as a promising feedstock for power generation via combustion and can be used for energy crisis adaption. We aimed to investigate the quantitative effects of various sludge characteristics on the overall sludge combustion process performance. Different types of sewage sludge were derived from numerous wastewater treatment plants in Beijing for further thermogravimetric analysis. Thermogravimetric-differential thermogravimetric curves were used to compare the performance of the studied samples. Proximate analytical data, organic compositions, elementary composition, and calorific value of the samples were determined. The relationship between combustion performance and sludge composition was also investigated. Results showed that the performance of sludge combustion was significantly affected by the concentration of protein, which is the main component of volatiles. Carbohydrates and lipids were not correlated with combustion performance, unlike protein. Overall, combustion performance varied with different sludge organic composition. The combustion rate of carbohydrates was higher than those of protein and lipid, and carbohydrate weight loss mainly occurred during the second stage (175-300°C).Carbohydrates have a substantial effect on the rate of system combustion during the second stage considering the specific combustion feature. Additionally, the combustion performance of digested sewage sludge is more negative than the others.

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Section: Tga Of Sludgementioning

confidence: 99%

Consequences of sludge composition on combustion performance derived from thermogravimetry analysis

Xiao

Wang

et al. 2015

Waste Management

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“…These experiments relate mainly to thermogravimetric studies designed to determine kinetic parameters. What is emphasised is the high reactivity and low temperature of degassing of such type of fuels, which is much lower than in case of carbon (Bień & Gandor, 2011;Werther et al, 1995). Another paper (Werle, 2011) presents a theoretical analysis of the possibility of co-combustion of municipal sewage sludge with hard coal in power stations (WR-25, CFB-420 and OP-230 boilers).…”

Section: Thermal Sludge Disposalmentioning

confidence: 99%

“…The problem of properties, methods of disposal of sewage sludge, its combustion and cocombustion with other fuels, as well as the impact of these processes on the environment is currently of the highest importance and widely is widely discussed in the literature, both national and international, including (Bień & Westalska, 2008;Bień & Gandor, 2010;Moroń et al, 2012;Werle, 2010Werle, , 2011Li et al, 2009;Werther et al, 1995;Słowik et al, 2011;Pająk, 2010Pająk, , 2012Werther & Ogada, 1999;Xiao et al, 2009;Xiao et al, 2010;Li et al, 2010;Nadziakiewicz & Kozioł, 2003).…”

Section: Thermal Sludge Disposalmentioning

confidence: 99%

Study Into Combustion of Sewage Sludge as Energetic Fuel / Badania Spalania Osadów Ściekowych Jako Paliwa Energetycznego

Kijo-Kleczkowska¹,

Środa²,

Otwinowski³

2013

Archives of Mining Sciences

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Along with the development of civilisation, it can be observed that the amount of waste of different type is growing and the preparation process for further usage of the waste or the utilization process differs. What is to be focused on is municipal sewage sludge which, due to its energetic properties, constitutes a valuable fuel. The problem of usage of municipal sewage sludge remains still unsolved, which stems both from the increasing amount of such waste, and from the lack of properly adjusted systems for thermal processing thereof. What is of an additional obstacle are the increasingly stricter legal regulations regarding disposal of sewage sludge after the year 2013; hence, it is necessary to consider various benefits resulting from thermal processing of such waste. This work presents an overview of methods of disposal of sewage sludge, taking into consideration, in particular, thermal methods including the process of combustion and co-combustion as a means of successful utilization.The research section of the work presents the results of study into the mechanism and kinetics of combustion of sewage sludge in various conditions of the process carried out in air flow. Combustion of sewage sludge has been compared against combustion of coal and biomass.Keywords: sewage sludge, thermal utilization, fuel combustion mechanism and kinetics Wraz z rozwojem cywilizacji zaobserwować można postępujące powstawanie różnego rodzaju odpadów różniących się, m.in. sposobem przygotowania do dalszego wykorzystania, czy procesem utylizacji. Na szczególną uwagę zasługują komunalne osady ściekowe, które z uwagi na właściwości energetyczne stanowią cenne paliwo. Problem wykorzystania komunalnych osadów ściekowych jest nadal otwarty, a wynika to zarówno z rosnącej produkcji tych odpadów, jak i braku odpowiednio przystosowanych instalacji do termicznego ich przekształcania. Dodatkowym utrudnieniem są zaostrzające się przepisy prawne dotyczące składowania osadów ściekowych po 2013 r. skłaniające tym samym do rozważań nad korzyściami płynącymi z termicznej obróbki tych odpadów.W pracy przedstawiono przegląd sposobów unieszkodliwiania osadów ściekowych ze szczególnym uwzględnieniem metod termicznych, głównie spalania i współspalania jako drogi do ich sukcesywnej utylizacji. W części badawczej pracy zaprezentowano wyniki badań mechanizmu i kinetyki spalania osadów ściekowych w różnych warunkach procesu prowadzonego w strumieniu powietrza. Spalanie osadów ściekowych porównano ze spalaniem węgla oraz biomasy.Słowa kluczowe: osady ściekowe, termiczna utylizacja, mechanizm i kinetyka spalania paliw

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“…About this, in turn, may determine the type of dryer that we use in the preparation of sludge for further disposal. The issue of ownership, the methods of disposal of sewage sludge, their combustion and co-combustion with other fuels, as well as the effect of these processes on the environment is at the present time very important and widely described in the literature, both the national and the international, including: (Bień & Westalska, 2008;Bień & Gandor, 2011;Moroń et al, 2012;Werle, 2010Werle, , 2011Li et al, 2009;Werther et al, 1995;Słowik et al, 2011;Pająk, 2010Pająk, , 2012.…”

Section: Properties Of Sewage Sludgementioning

confidence: 99%

Analysis of Combustion Process of Sewage Sludge in Reference to Coals and Biomass

Środa¹,

Kijo-Kleczkowska²

2016

Archives of Mining Sciences

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Production of sewage sludge is an inseparable part of the treatment process. The chemical and sanitary composition of sewage sludge flowing into the treatment plant is a very important factor determining the further use of the final product obtained in these plants. The sewage sludge is characterized by heterogeneity and multi-components properties, because they have characteristics of the classical and fertilizer wastes and energetic fuels. The thermal utilization of sewage sludge is necessary due to the unfavorable sanitary characteristics and the addition of the industrial sewage. This method ensures use of sewage sludge energy and return of expenditure incurred for the treatment of these wastes and their disposal. Sewage sludge should be analyzed in relation to conventional fuels (coals and biomass). They must comply with the applicable requirements, for example by an appropriate degree of dehydration, which guarantee the stable and efficient combustion. This paper takes the issue of the combustion process of the different sewage sludge and their comparison of the coal and biomass fuels.

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Devolatilisation and Combustion Characteristics of Sewage Sludge in a Bubbling Fluidized Bed Furnace

Cited by 17 publications

References 2 publications

Consequences of sludge composition on combustion performance derived from thermogravimetry analysis

Consequences of sludge composition on combustion performance derived from thermogravimetry analysis

Study Into Combustion of Sewage Sludge as Energetic Fuel / Badania Spalania Osadów Ściekowych Jako Paliwa Energetycznego

Analysis of Combustion Process of Sewage Sludge in Reference to Coals and Biomass

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