Glass Fertilizers Obtained Using Sewage Sludge ASH Wastes

The sewage sludge ash represents an important waste both in terms of the generated quantities and the phosphorus content. Starting from these premises, the present paper proposes an alternative way to use these ash as vitreous fertilizers. Another waste with potential applicability for this purpose is the sludge from the deep water treatment plants, which has a high iron content, an essential microelement for plants development. The paper addresses two aspects: the kinetic study of the solubilisation process of potassium, phosphorus and iron ions from the obtained fertilizers and their effect on barley plants respectively. The kinetic study using the model of intra particular diffusion revealed the process of ionic solubilisation process in two distinct steps: one slow, speed controlling - diffusion through the glass matrix, and second, faster - diffusion through the medium particle boundary. The fertilizing effect, analysed using specific parameters: germination percent, biomass and plant length, recommends as optimal the composition with the maximum addition of ash.

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Kinetic study of heavy metals Cu and Zn removal during sewage sludge ash calcination in air and N 2 atmospheres

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2017.12.061 ◽

2018 ◽

Vol 347 ◽

pp. 227-232 ◽

Cited By ~ 6

Author(s):

Rundong Li ◽

Zhenyu Zhai ◽

Yanlong Li ◽

Tianhua Yang ◽

Yang Chen

Keyword(s):

Heavy Metals ◽

Sewage Sludge ◽

Kinetic Study ◽

Sewage Sludge Ash ◽

Sludge Ash ◽

Cu And Zn

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Characteristic of wet method of phosphorus recovery from polish sewage sludge ash with nitric acid

Open Chemistry ◽

10.1515/chem-2016-0006 ◽

2016 ◽

Vol 14 (1) ◽

pp. 37-45 ◽

Cited By ~ 18

Author(s):

Katarzyna Gorazda ◽

Barbara Tarko ◽

Zbigniew Wzorek ◽

Anna K. Nowak ◽

Joanna Kulczycka ◽

...

Keyword(s):

Nitric Acid ◽

Sewage Sludge ◽

Phosphorus Content ◽

Extraction Efficiency ◽

Phosphorus Recovery ◽

Phosphorus Compounds ◽

Acid Extraction ◽

Treatment Technology ◽

Sewage Sludge Ash ◽

Sludge Ash

AbstractSewage Sludge Ash (SSA) is a concentrated source of phosphorus and can be successfully recycled via a number of different routes. This paper presents research results on phosphorus recovery from differently combusted sewage sludge with the use of nitric acid extraction. Different SSA forms from Polish thermal utilization stations were compared. It was revealed that sewage treatment technology as well as combustion technology influence many physical and chemical parameters of ashes that are crucial for further phosphorus recovery from such waste according to the proposed method. Presented research defines extraction efficiency, characterized extracts composition and verifies the possibility of using SSA as cheaper and alternative sources of phosphorus compounds. Gdynia, Kielce and Kraków SSA have the best properties for the proposed technology of phosphorus recovery with high extraction efficiency greater than 86%. Unsuitable results were obtained for Bydgoszcz, Szczecin Slag and Warszawa SSA. Extraction process for Łódź and Szczecin Dust SSA need to be improved for a higher phosphorus extraction efficiency greater than 80%.Phosphorus content in extracts varies from 1.6 to 103.4 g PO43− per 1 dm3, nitrogen content was 167,4 g per 1 dm3 while the K content reached 0.2 to 2.37 g per 1 dm3. The lowest content of Fe, Ni, Cr, Cd is noted in extracts after phosphorus recovery from Gdynia SSA, where the phosphorus content is also at the highest level.The proposed solution can be considered as waste minimization technology by the rational recycling of phosphorus and could be used in industry to produce fertilizers.

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Removal of Heavy Metals from Wastewater Using Sewage Sludge Ash (SSA) as Adsorbent

SSRN Electronic Journal ◽

10.2139/ssrn.3164094 ◽

2017 ◽

Author(s):

Safaa Ragheb

Keyword(s):

Heavy Metals ◽

Sewage Sludge ◽

Sewage Sludge Ash ◽

Removal Of Heavy Metals ◽

Sludge Ash

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Influence of seawater on the mechanical and microstructural properties of lime-incineration sewage sludge ash pastes

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.122364 ◽

2021 ◽

Vol 278 ◽

pp. 122364

Author(s):

Yifan Zhou ◽

Jianxin Lu ◽

Jiangshan Li ◽

Chris Cheeseman ◽

Chi Sun Poon

Keyword(s):

Sewage Sludge ◽

Microstructural Properties ◽

Sewage Sludge Ash ◽

Mechanical And Microstructural Properties ◽

Sludge Ash

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Effect of NaCl and MgCl2 on the hydration of lime-pozzolan blend by recycling sewage sludge ash

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.127759 ◽

2021 ◽

pp. 127759

Author(s):

Yifan Zhou ◽

Jianxin Lu ◽

Jiangshan Li ◽

Chris Cheeseman ◽

Chi Sun Poon

Keyword(s):

Sewage Sludge ◽

Sewage Sludge Ash ◽

Sludge Ash

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Applying Mixture of Municipal Incinerator Bottom Ash and Sewage Sludge Ash for Ceramic Tile Manufacturing

Materials ◽

10.3390/ma14143863 ◽

2021 ◽

Vol 14 (14) ◽

pp. 3863

Author(s):

Deng-Fong Lin ◽

Wei-Jhu Wang ◽

Chia-Wen Chen ◽

Kuo-Liang Lin

Keyword(s):

Wear Resistance ◽

Sewage Sludge ◽

Water Absorption ◽

Ceramic Tile ◽

Bending Strength ◽

Bottom Ash ◽

Waste Materials ◽

Sewage Sludge Ash ◽

Kiln Temperature ◽

Sludge Ash

Municipal incinerator bottom ash (MIBA) and sewage sludge ash (SSA) are secondary wastes produced from municipal incinerators. Landfills, disposal at sea, and agricultural use have been the major outlets for these secondary wastes. As global emphasis on sustainability arises, many have called for an increasing reuse of waste materials as valuable resources. In this study, MIBA and SSA were mixed with clay for ceramic tile manufacturing in this study. Raw materials firstly went through TCLP (Toxicity Characteristic Leaching Procedure) to ensure their feasibility for reuse. From scanning electron microscopy (SEM), clay’s smooth surface was contrasted with the porous surface of MIBA and SSA, which led to a higher water requirement for the mixing. Specimens with five MIBA mix percentages of 0%, 5%, 10%, 15%, and 20% (wt) and three SSA mix percentages of 0%, 10%, and 20% (wt) were made to compare how the two waste materials affected the quality of the final product and to what extent. Shrinkage tests showed that MIBA and SSA contributed oppositely to tile shrinkage, as more MIBA reduced tile shrinkage, while more SSA encouraged tile shrinkage. However, as the kiln temperature reached 1150 °C, the SiO2-rich SSA adversely reduced the shrinkage due to the glass phase that formed to expand the tile instead. Both MIBA and SSA increased water tile absorption and reduced its bending strength and wear resistance. Increasing the kiln temperature could effectively improve the water absorption, bending strength, and wear resistance of high MIBA and SSA mixes, as SEM showed a more compact structure at higher temperatures. However, when the temperature reached 1100 °C, more pores appeared and seemingly exhausted the benefit brought by the higher temperature. Complex interactions between kiln temperature and MIBA/SSA mix percentage bring unpredictable performance of tile shrinkage, bending strength, and water absorption, which makes it very challenging to create a sample meeting all the specification requirements. We conclude that a mix with up to 20% of SSA and 5% of MIBA could result in quality tiles meeting the requirements for interior or exterior flooring applications when the kiln temperature is carefully controlled.

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