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Comparative evaluation of drying methods for struvite produced from electrocoagulated source-separated urine: Implications for quality, energy and cost-effectiveness.
Zaffar, Alisha; Jayaraman, Sivaraman; Sutar, Parag Prakash; Balasubramanian, Paramasivan.
Afiliação
  • Zaffar A; Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, -769008, India.
  • Jayaraman S; Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, -769008, India.
  • Sutar PP; Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, -769008, India.
  • Balasubramanian P; Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, -769008, India. Electronic address: biobala@nitrkl.ac.in.
J Environ Manage ; 356: 120665, 2024 Apr.
Article em En | MEDLINE | ID: mdl-38518498
ABSTRACT
Struvite precipitation from source-separated urine is crucial for waste utilization and sustainability. However, after precipitation, the high moisture content of struvite necessitates an additional drying process that can be costly and inefficient. In the present study, the performance of different drying methods-open sun drying, air drying, conventional drying (20-100 °C), and microwave drying (180-720 W) on the quality of struvite obtained from source-separated urine through electrocoagulation using Mg-Mg electrodes were evaluated. It was found that higher temperatures and power in the convective oven and microwave resulted in higher diffusivity (10-9-10-7 m2s-1), leading to reduced drying times. Different models were employed to comprehend the drying mechanism, and the one with the highest correlation coefficient (R2 = 0.99) and the lowest statistical values was selected. The key findings indicated that higher power and temperature levels were more cost-effective. However, characterization of the dried struvite using X-ray diffraction and Fourier-transformed infrared spectroscopy, disintegration of struvite crystals at temperatures above 60 °C in the conventional oven and 180 W in the microwave oven was observed. Based on the results, we conclude that sun drying is a cost-effective and environmentally friendly alternative for drying struvite without compromising its quality.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Contexto em Saúde: 1_ASSA2030 Problema de saúde: 1_financiamento_saude Assunto principal: Dessecação Idioma: En Revista: J Environ Manage Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Índia

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Contexto em Saúde: 1_ASSA2030 Problema de saúde: 1_financiamento_saude Assunto principal: Dessecação Idioma: En Revista: J Environ Manage Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Índia
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