Caldeira Daiane Cristina Diniz, Silva Cláudio Mudadu, Rodrigues Fábio de Ávila, Zanuncio Antonio José Vinha
Departamento de Engenharia Civil and Departamento de Engenharia Florestal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil E-mail:
Departmento de Engenharia Florestal, Universidade Federal de Viçosa, 36570-000 Viçosa, Minas Gerais, Brazil.
Water Sci Technol. 2023 Aug;88(3):751-762. doi: 10.2166/wst.2023.242.
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 Mn, 0.012929, 0.018368 and 0.023595 kmol/h for Fe and 0.000542, 0.000722 and 0.000948 kmol/h for Cu, 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.
本研究的目的是使用Aspen Plus进行模拟，评估水回路的封闭情况以及在TMP生产中回用处理后的废水。处理后的废水被回用，分别替代50%、75%和100%的井水。评估了对Aspen Plus程序的改编，该改编模拟了TMP生产过程，并进行了动态模拟测试，以验证在不同回用比例下工业过程中非工艺元素（NPEs）的积累情况。通过实验室纸浆亮度和亮度逆转漂白测试评估最终产品的质量。对于50%、75%和100%的处理后废水回用情况，Mn的NPE浓度分别为0.00097、0.00122和0.00145 kmol/h，Fe的NPE浓度分别为0.012929、0.018368和0.023595 kmol/h，Cu的NPE浓度分别为0.000542、0.000722和0.000948 kmol/h。不同比例的废水回用以及使用新鲜工业水时，纸浆的亮度和亮度逆转情况相似，亮度值范围为83.37%至83.97% ISO，亮度逆转值范围为5.43至6.38 ISO单位。使用处理后的废水不会影响纸浆质量，这可以减少制浆厂的用水量。
