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水解污水污泥作为用于生产密封袋的生物基原料

Luis Romero¹, Shihan Weng¹, Paula Oulego¹

¹Department of Chemical and Environmental Engineering, University of Oviedo, c/Julián Clavería s/n, E-33071 Oviedo, Spain.

Waste management (New York, N.Y.)

|November 25, 2023

概括

污水污泥可以通过性热水解转化为用于密封袋 (BMHB) 的可持续生物基材料. 这种环保包装有效地保护人免受农药的伤害,并且对于土壤应用是安全的.

科学领域:

材料科学材料科学材料科学
环境工程环境工程
生物技术是生物技术.

背景情况:

污水处理厂产生大量的污水污泥,这给处置带来了挑战.
在包装中使用的石油衍生塑料有助于环境污染.
对传统塑料的可持续和可生物降解替代品的需求越来越大.

研究的目的:

调查利用污水污泥作为生产密封袋 (BMHB) 生物基材料的可持续资源的可行性.
优化热水解过程,最大限度地提高生物分子溶解度,增强BMHB的性能.
评估BMHB作为农业农药环保包装的性能和安全性.

主要方法:

污水污泥在不同温度 (120-150°C),停留时间 (1-4小时) 和pH值 (6.6-10) 的条件下经过热水解.
量化了溶解的生物分子 (蛋白质,类物质,碳水化合物).
评估了BMHB的机械电阻 (穿孔电阻),紫外线照射,水蒸气透性 (WVP),水友性,可溶性和热稳定性.
评估了BMHB作为乙胺的包装的性能,包括杀虫剂释放和生物降解性.

主要成果:

性热水解 (pH10) 显著增强了蛋白质,类物质和碳水化合物的溶解.
BMHB表现出增强的机械电阻 (穿孔电阻高达63.7N/mm) 和有效的紫外线保留 (280-400nm).
BMHB 显示出有利的特性:WVP (~3.9 g*mm/m2*h*kPa),水性 (接触角度 35.4°-64°),高溶解度 (~95%) 和良好的热稳定性 (在 700 °C 降解 ~ 74%).
BMHB安全包装的乙胺,允许快速释放农药 (在5分钟内) 和最小的残留物.
对BMHB的土壤应用被认为是安全的,符合重金属限制,没有微生物污染.

结论:

污水污泥是生产高性能BMHB的可行和可持续原料.
优化性热水解对于最大限度地提取生物分子和材料特性至关重要.
在农业包装应用中,BMHB为以石油为基础的塑料提供了一个环保和安全的替代品.
开发的BMHB材料为废物利用和可持续包装开发提供了一个有希望的解决方案.

关键词:

生物基材料是生物基材料.生物聚合物是一种生物聚合物.环保包装环保包装环保包装污水污泥的污水污泥是污水中的污泥.热水解是热水解的方法.

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