1. Isothermal drying kinetics of sewage sludge using weathered coal fly ash as adjuvant for agronomic application
- Author
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Rui J. A. Lopes, Andreia F. Santos, J. C. Gois, Luciano A. Gomes, and Margarida J. Quina
- Subjects
0208 environmental biotechnology ,Kinetics ,Amendment ,02 engineering and technology ,010501 environmental sciences ,Coal Ash ,complex mixtures ,01 natural sciences ,Isothermal process ,Soil ,Environmental Chemistry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Water Science and Technology ,Sewage ,fungi ,technology, industry, and agriculture ,General Medicine ,respiratory system ,Pulp and paper industry ,020801 environmental engineering ,Coal ,Fly ash ,Environmental science ,Sludge - Abstract
This study aims to evaluate the effect of weathered coal fly ash (CFA) as a drying adjuvant of sewage sludge (SS) to produce a soil amendment. The high amount of SS and CFA creates a complex waste management problem in many countries, requiring more research efforts. Towards a circular economy, CFA can be viewed as an anthropogenic inorganic by-product with valuable nutrients (e.g. K), which can be recovered in combination with SS (rich in organic matter, N, and P). Different temperatures (70, 85, 100, 115, and 130 °C) are tested to dry small SS cylinders, without and with 0.15 g CFA g
- Published
- 2019