Aspen Plus simulation for effluent reuse in thermomechanical pulp mills

Autor: Daiane Cristina Diniz Caldeira, Cláudio Mudadu Silva, Fábio de Ávila Rodrigues, Antonio José Vinha Zanuncio
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Water Science and Technology, Vol 88, Iss 3, Pp 751-762 (2023)
Druh dokumentu: article
ISSN: 0273-1223
1996-9732
DOI: 10.2166/wst.2023.242
Popis: The objective of this study was to evaluate the closing of the water circuit and reusing the treated effluent in the production of TMP, using simulations performed with the Aspen Plus®. The treated effluent was reused to replace 50, 75 and 100% of the well water. An adaptation of the Aspen Plus® program simulating the TMP production process and a dynamic simulation test to verify the accumulation of non-process elements (NPEs) in industrial processes at different proportions of reuse were evaluated. The quality of the final product was assessed in laboratory bleaching tests for pulp brightness and brightness reversion. The concentrations of the NPE were 0.00097, 0.00122 and 0.00145 kmol/h for Mn2+, 0.012929, 0.018368 and 0.023595 kmol/h for Fe2+ and 0.000542, 0.000722 and 0.000948 kmol/h for Cu2+, with the recycling of the treated effluent of 50, 75 and 100%, respectively. The brightness and brightness reversion of the pulp were similar with the different proportions of effluent reuse and with the use of fresh industrial water, with values ranging from 83.37 to 83.97% ISO and 5.43 to 6.38 ISO units, respectively. The use of treated effluent did not affect the pulp quality, which could diminish the water use a pulp mil. HIGHLIGHTS Daiane Cristina Diniz Caldeira: Departamento de Engenharia Civil and Departamento de Engenharia Florestal, Universidade Federal de Viçosa, 36,570-900 Viçosa, Minas Gerais, Brazil.; Cláudio Mudadu Silva: Departmento de Engenharia Florestal, Universidade Federal de Viçosa, 36570-000 Viçosa, Minas Gerais, Brazil. e-mail: mudado@ufv.br; Fábio de Ávila Rodrigues: Departmento de Engenharia Civil, Universidade Federal de Viçosa, 36,570-900 Viçosa, Minas Gerais, Brazil. e-mail: farrodrigues1@gmail.com; Antonio José Vinha Zanuncio: Instituto de Ciências Agrárias, Universidade Federal de Uberlândia, 38500-000, Monte Carmelo, Minas Gerais, Brazil. e-mail: ajvzanuncio@gmail.com;
Databáze: Directory of Open Access Journals
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