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How Bioplastics Break Down Without Leaving Microplastics
生物塑料如何在不产生微塑料的情况下自然降解
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Bioplastics made from cornstarch or sugarcane differ from petroleum-based plastics because their molecular chains are designed to be digested by microbes.以玉米淀粉或甘蔗为原料的生物塑料，其分子链经设计可被微生物分解，因而不同于石油基塑料。
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In industrial composting facilities, where heat, moisture, and oxygen levels are tightly controlled, they fully decompose within 90 days.在工业堆肥设施中，温度、湿度和氧气水平受到严格控制，这些材料可在90天内完全降解。
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Unlike conventional plastics, which fragment into persistent microplastics, certified bioplastics convert into water, CO₂, and organic matter.与传统塑料会碎裂成难以降解的微塑料不同，经认证的生物塑料可转化为水、二氧化碳和有机质。
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Home composting works for some types—but only if temperatures stay above 50°C for several days, which most backyard bins cannot guarantee.家庭堆肥仅适用于部分类型，但前提是温度需连续多日保持在50°C以上，而大多数家用堆肥箱无法保证这一点。
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Certification labels like 'OK Compost INDUSTRIAL' help consumers identify truly biodegradable options, not just 'greenwashed' alternatives.‘OK Compost INDUSTRIAL’等认证标识有助于消费者识别真正可生物降解的产品，而非仅是‘漂绿’替代品。
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Still, mixing bioplastics with regular recycling streams contaminates batches, so separate collection is essential for circularity.然而，将生物塑料混入常规回收流会污染整批物料，因此分类收集对实现循环至关重要。
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Researchers are now engineering microbes that accelerate breakdown in soil and seawater, aiming to solve leakage problems in natural environments.研究人员正改造微生物，以加快其在土壤和海水中的分解速度，旨在解决生物塑料在自然环境中泄漏的问题。
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Widespread adoption depends not only on material science but also on building infrastructure for proper collection and processing.大规模应用不仅依赖材料科学进步，更需建设配套的收集与处理基础设施。