In the granulation process there were four periods: formation of microbial flocs, formation of subcore, growth of subcore and mature of granules.
颗粒化过程包括：微生物絮凝体的形成、亚核的形成，亚核增长和颗粒成熟四个阶段。
In the granulation process there were four periods: formation of microbial flocs, formation of subcore, growth of subcore and mature of granules.
颗粒化过程包括：微生物絮凝体的形成、亚核的形成，亚核增长和颗粒成熟四个阶段。
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