Scholarlink

<p>Sludge is the main solid waste generated within the mill. The effluent treatment plant usually generates primary (PS) and secondary sludge (SS). PS is rich in cellulose fibers and SS is rich in bacterial cells. SS is more difficult to dewater and is often mixed with the PS to help drainage. Currently, the main way for disposal is landfilling or incineration without any pre-treatment. New processes are required to seek a more circular economy and maximum use of all co-products. Pelletization is a simple process that allows the standardization and increase of energy density of the biomass. This work aimed to produce pellets using various blends of PS and SS generated at a kraft pulp mill (100% PS, 75% PS, 50% PS, 25% PS, 0% PS) and testing different moisture content, on a wet basis (10%, 25%, 40%). The sludge was subject to elemental characterization, proximate analysis, heating value, thermal degradation evaluation, and ash melting behavior analysis. The increase of secondary sludge increased the ash content of the pellets. The ash melting temperature of the sludges was higher than the typical operating temperatures of boilers. The sludge had a higher heating value (16.2—17.4&#xa0;MJ.kg<sup>−1</sup>). The pellets produced using the blend of 75% PS + 25% SS with a moisture content of 25% presented low fines generation (0.043%) and high durability (99.3%). The pellets produced with 100% SS at 40% moisture showed the lowest resistance. The pelletization process was a suitable alternative for managing pulp mill sludge.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sustainable production of pellets from high-moisture Eucalyptus pulp mill sludge

  • 期刊论文

  • 发表日期：

    2025年9月8日

查看全文
  • Bruna Virgínia Cunha Rodrigues,
  • Angélica de Cassia Oliveira Carneiro,
  • Caio Moreira Miquelino Eleto Torres,
  • João Pedro Fonseca do Amaral,
  • Daiane Cristina Diniz Caldeira,
  • Claudio Mudadu Silva

摘要

Sludge is the main solid waste generated within the mill. The effluent treatment plant usually generates primary (PS) and secondary sludge (SS). PS is rich in cellulose fibers and SS is rich in bacterial cells. SS is more difficult to dewater and is often mixed with the PS to help drainage. Currently, the main way for disposal is landfilling or incineration without any pre-treatment. New processes are required to seek a more circular economy and maximum use of all co-products. Pelletization is a simple process that allows the standardization and increase of energy density of the biomass. This work aimed to produce pellets using various blends of PS and SS generated at a kraft pulp mill (100% PS, 75% PS, 50% PS, 25% PS, 0% PS) and testing different moisture content, on a wet basis (10%, 25%, 40%). The sludge was subject to elemental characterization, proximate analysis, heating value, thermal degradation evaluation, and ash melting behavior analysis. The increase of secondary sludge increased the ash content of the pellets. The ash melting temperature of the sludges was higher than the typical operating temperatures of boilers. The sludge had a higher heating value (16.2—17.4 MJ.kg−1). The pellets produced using the blend of 75% PS + 25% SS with a moisture content of 25% presented low fines generation (0.043%) and high durability (99.3%). The pellets produced with 100% SS at 40% moisture showed the lowest resistance. The pelletization process was a suitable alternative for managing pulp mill sludge.