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。
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。
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。
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。
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。
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。
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。
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。