Energy analysis of sewage sludge energy conversion processes for Turkey—investigation of existing drying and combustion plants

Sapmaz, Süleyman; Kılıçaslan, İbrahim

doi:10.1007/s13399-022-02773-x

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…Thus, it requires thermal drying at temperatures above 105°C for its removal. Sapmaz and Kiliçaslan 40 presented that by decreasing the moisture content of the sludge, the specific energy consumption of the drying process increases. In fact, when the amount of free water diminishes, the intracellular water must diffuse to the particle surface which is a relatively slow process.…”

Section: Resultsmentioning

confidence: 99%

Solar drying process for sewage sludge in a drying bed: A case study in Tunisia

Masmoudi

Ali

Dhaouadi

et al. 2023

Env Prog and Sustain Energy

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The aim of this work is to investigate and model the sewage sludge drying kinetics in a lab‐scale drying bed by varying the sludge layer thickness during winter and summer. During each season, five experiments were carried out with increasing the sludge thickness by 0.5 cm each time. To achieve moisture content on a dry basis of 12%, the sludge drying period varied between 120 and 312 h in winter and between 72 and 168 h in summer. Thus, by increasing the sludge thickness, the drying time increased. The different curves of the moisture content evolution and the drying rates were analyzed. The drying curves show that the warm‐up phase (phase 0) and the constant rate phase (phase 1) are absent during the winter and summer seasons. Regardless of the sludge thickness, only the falling rate period was observed. In addition, the moisture content dropped quickly throughout the first 24 h because of the elimination of interstitial water. The drying characteristic curve has been represented by a 3rd degree polynomial. Mathematical equations were used to describe the experimental curves of drying kinetics. The logarithmic model was the most reliable for simulating the changes of reduced moisture content versus drying time in winter and summer.

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Section: Resultsmentioning

confidence: 99%

Solar drying process for sewage sludge in a drying bed: A case study in Tunisia

Masmoudi

Ali

Dhaouadi

et al. 2023

Env Prog and Sustain Energy

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“…However, sanitary landfill consumes significant land resources while also posing challenges related to leachate management that may lead to groundwater pollution. Incineration generally requires supplementary fuel to ensure sludge combustion, which makes this method economically less viable (Sapmaz & Kiliçaslan, 2023). Considering these potential drawbacks, land use of sludge is increasingly regarded as a positive, effective, and promising way of sludge disposal, that is, the use of sludge for mine rehabilitation, saline-alkaline land transformation, desert remediation, the repair and improvement of damaged soil such as reclaimed land and barren land, landscaping and greening construction, and forest land application (Li et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

Research on the toxic effects of polyacrylamide and cadmium on plants during soil utilization of municipal sludge

Cai,

Gao,

Wang

et al. 2024

Land Degrad Dev

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This research aimed to examine the compound effects of polyacrylamide (PAM) and cadmium (Cd) on plant growth subsequent to the mixing of municipal sludge with soil and to explore the potential ecological risks associated with the use of sludge. A pot experiment was performed wherein four gradients (0, 5, 15, and 20 g/[kg dry sludge]) were established corresponding to different PAM concentrations to assess the effects on the physiological and biochemical parameters of Brassica campestris L. ssp. chinensis Makino and Brassica campestris L. and the effects on Cd and PAM concentrations in soil. The findings indicated that the biomass of both plants increased when the total PAM concentration ranged from 5 g to 15 g/(kg dry sludge). Concurrently, polyacrylamide (PAM) downplayed the uptake of Cd by the plants, reduced phytotoxicity, and increased the activities of antioxidant enzymes such as superoxide dismutase (SOD) and peroxidase (POD) in the roots. However, the biomass of Brassica campestris L. ssp. chinensis Makino and Brassica campestris L. decreased significantly when the total PAM concentration was exceeded 15 g/(kg dry sludge), and the toxic effect of Cd on pants was enhanced to some extent. Especially when the PAM concentration was 20 g/(kg dry sludge), apparent cell damage was observed in root cells. It was further noted that Brassica campestris L. portrayed a higher tolerance towards higher proportions of sludge compared with Brassica campestris L. ssp. chinensis Makino. Sludge holds a wider scale of applicability in landscaping than in agriculture. A fusion of polyacrylamide (PAM) and antioxidant enzymes could potentially counteract the effects of Cd within a specific concentration range, serving as a defense mechanism against stress. The data obtained from this study are crucial for unraveling anti‐stress responses and detoxification mechanisms employed by different plant species under the influence of factors such as PAM, Cd, and others, thus providing novel insights into research related to land use involving sludges.

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Enhancing biomass fuel properties of municipal sewage sludge with carbon-rich and low ash energy crops common reed and miscanthus

Yurten,

Ozdemir

2024

Industrial Crops and Products

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Energy analysis of sewage sludge energy conversion processes for Turkey—investigation of existing drying and combustion plants

Cited by 4 publications

References 49 publications

Solar drying process for sewage sludge in a drying bed: A case study in Tunisia

Solar drying process for sewage sludge in a drying bed: A case study in Tunisia

Research on the toxic effects of polyacrylamide and cadmium on plants during soil utilization of municipal sludge

Enhancing biomass fuel properties of municipal sewage sludge with carbon-rich and low ash energy crops common reed and miscanthus

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