Effect of sewage sludge properties on the biochar characteristic

Zielińska, Anna; Oleszczuk, Patryk; Charmas, B.; Skubiszewska–Zięba, J.; Pasieczna-Patkowska, Sylwia

doi:10.1016/j.jaap.2015.01.025

Cited by 247 publications

(157 citation statements)

References 32 publications

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“…The yield of biochar produced at 350°C was 48.1%, which was in accordance with the result obtained by Méndez et al (24). The pyrolysis process increased the percentage of ash content, as reported by others (31,32). The percentage of ash content was increased from 59.45% for sewage sludge to 64.2% for biochar.…”

Section: Resultssupporting

confidence: 91%

Effects of sewage sludge and its biochar on soybean yield in fine-textured loess soil

Dokht

Naeini

Dordipour

et al. 2017

Environ Health Eng Manag

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Background: The application of biochar as a soil amendment has achieved popularity and has been found to improve considerably soil nutrient status and plant productivity in low fertile soils. Methods: This study used two different methods to apply sewage sludge and sewage sludge biochar with three replicates in a completely randomized block design. The experiment included (1) control, (2) mulch biochar (20 t/ha), (3) incorporated biochar (20 t/ha), (4) mulch sewage sludge (45 t/ha), and (5) incorporated sewage sludge (45 t/ha). This study aimed to investigate the potential benefits of sewage sludge and its biochar as mulch and incorporated into the top-soil for soil fertility, growth, yield, and shoot nutrient concentration of soybean and the effects of treatments on dry bulk density, water content, and mechanical resistance. Results:The results showed higher values of height, biological yield, grain yield, and number of pods in the biochar mulch treatments (116.5, 10627.01, 4180, and 71.2, respectively). Moreover, it was determined that the addition of biochar and sewage sludge to soil resulted in increased shoot nitrogen (N), phosphorous (P), and potassium (K) concentrations, soil P, soil K, and total soil N (TN) compared with the control plots. Results from this study also showed that biochar and sewage sludge had positive impacts on the physical properties of soil. Bulk density and soil mechanical resistance were decreased, and volumetric water content was increased. Conclusion: Heating sludge removed all pathogens. It is recommended that short-and long-term studies be conducted in the region to investigate further increases in the combined biochar and sewage sludge application rates. Keywords: Nitrogen (N), Phosphorous (P), Potassium (K), Pathogens Citation: Fathi Dokht H, Movahedi Naeini SA, Dordipour E, De Jong LW, Hezarjaribi E. Effects of sewage sludge and its biochar on soybean yield in fine-textured loess soil.

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Section: Resultssupporting

confidence: 91%

Effects of sewage sludge and its biochar on soybean yield in fine-textured loess soil

Dokht

Naeini

Dordipour

et al. 2017

Environ Health Eng Manag

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“…Perhaps some of the most comprehensive studies on systematic evaluation of the properties of chars produced from different sewage sludges at different temperatures are those carried out by Zielinska et al [22] and Capodaglio and Callegari [23]. Sewage sludge samples were subject to (traditional) pyrolysis in a laboratory furnace at temperatures of 500, 600, and 700 • C, with a heating rate of 25 • C/min, in an oxygen-free atmosphere maintained by constant flow of nitrogen gas.…”

Section: Sewage Sludge Char Characteristicsmentioning

confidence: 99%

Properties and Beneficial Uses of (Bio)Chars, with Special Attention to Products from Sewage Sludge Pyrolysis

2018

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Abstract:Residual sludge disposal costs may constitute up to, and sometimes above, 50% of the total cost of operation of a Wastewater Treatment Plant (WWTP) and contribute approximately 40% of the total greenhouse gas (GHG) emissions associated with its operation. Traditionally, wastewater sludges are processed for: (a) reduction of total weight and volume to facilitate their transfer and subsequent treatments; (b) stabilization of contained organic material and destruction of pathogenic microorganisms, elimination of noxious odors, and reduction of putrefaction potential and, at an increasing degree; (c) value addition by developing economically viable recovery of energy and residual constituents. Among several other processes, pyrolysis of sludge biomass is being experimented with by some researchers. From the process, oil with composition not dissimilar to that of biodiesels, syngas, and a solid residue can be obtained. While the advantage of obtaining sludge-derived liquid and gaseous fuels is obvious to most, the solid residue from the process, or char (also indicated as biochar by many), may also have several useful, initially unexpected applications. Recently, the char fraction is getting attention from the scientific community due to its potential to improve agricultural soils' productivity, remediate contaminated soils, and supposed, possible mitigation effects on climate change. This paper first discusses sludge-pyrolysis-derived char production fundamentals (including relationships between char, bio-oil, and syngas fractions in different process operating conditions, general char properties, and possible beneficial uses). Then, based on current authors' experiments with microwave-assisted sludge pyrolysis aimed at maximization of liquid fuel extraction, evaluate specific produced char characteristics and production to define its properties and most appropriate beneficial use applications in this type of setting.

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“…During treatment at about 350-700°C, besides biochar, some highly energetic liquid and gas products (oil being a mixture of liquid hydrocarbons and synthetic gas being a mixture of gas hydrocarbons) are formed. Proportions of the pyrolysis products depend on the kind of initial material and process conditions: range and rate of changes of temperature, time, pressure, and atmosphere [14][15][16][17][18][19][20][21][22][23]. The choice of pyrolysis parameters affects productivity and quality of the obtained biochar.…”

Section: Introductionmentioning

confidence: 99%

Active carbons from waste biochars

Skubiszewska–Zięba

Charmas

Kołtowski

et al. 2017

J Therm Anal Calorim

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Studies of preparation of active carbons of good structural and adsorption properties based on commercial biochars, which become wastes after removal of precious volatile components from natural raw materials of different origin, i.e., from wheat straw, Miscanthus grass, walnut shells, and energetic willow were carried out. There was applied the physical activation under atmospheric pressure in the fluidal reactor using CO 2 or overheated steam and in the closed system in the high pressure microwave reactor under hydrothermal conditions. The obtained active carbons were investigated by means of adsorption (N 2 ), thermal (TG, DTG, DTA), spectral (Raman spectra) as well as electron microscopy methods. The adsorbents obtained as a result of modification were characterized by a welldeveloped porous structure and greater thermal resistance compared to the initial biochars.

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Effect of sewage sludge properties on the biochar characteristic

Cited by 247 publications

References 32 publications

Effects of sewage sludge and its biochar on soybean yield in fine-textured loess soil

Effects of sewage sludge and its biochar on soybean yield in fine-textured loess soil

Properties and Beneficial Uses of (Bio)Chars, with Special Attention to Products from Sewage Sludge Pyrolysis

Active carbons from waste biochars

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