Abstract：
The escalating consumer demand for crabs results in a growing amount of waste, including shells, claws, and other non-edible parts. The resulting crab shell waste (CSW) is disposed of via incineration or landfills which causes environmental pollution. CSW represents a potential biological resource that can be transformed into valuable resources via pyrolysis technique. In this study, microwave pyrolysis of CSW using self-purging, vacuum, and steam activation techniques was examined to determine the biochar production yield and its performance in treating palm oil mill effluent (POME). The biochar produced through microwave pyrolysis exhibits yields ranging from 50 to 61 wt%, showing a hard texture, low volatile matter content (≤34.1 wt%), and high fixed carbon content (≥58.3 wt%). The KOH-activated biochar demonstrated a surface area of up to 177 m2/g that is predominantly composed of mesopores, providing a good amount of adsorption sites for use as adsorbent. The biochar activated with steam removed 8.3 mg/g of BOD and 42 mg/g of COD from POME. The results demonstrate that microwave pyrolysis of CSW is a promising technology to produce high-quality biochar as an adsorbent for POME treatment.
摘要：
消费者对螃蟹需求的不断升级导致了越来越多的废物，包括贝壳,爪子,和其他不可食用的部分。所产生的蟹壳废物（CSW）通过焚烧或垃圾填埋场进行处理，从而造成环境污染。CSW代表了一种潜在的生物资源，可以通过热解技术转化为有价值的资源。在这项研究中,CSW的微波热解使用自吹扫，真空,并研究了蒸汽活化技术，以确定生物炭的产量及其在处理棕榈油厂废水（POME）中的性能。通过微波热解产生的生物炭的产率范围为50至61wt％，表现出坚硬的质地，挥发性物质含量低(≤34.1wt%)，和高固定碳含量(≥58.3wt%)。KOH活化的生物炭的表面积高达177m2/g，主要由中孔组成，提供大量的吸附位点用作吸附剂。用蒸汽活化的生物炭从POME中除去8.3mg/g的BOD和42mg/g的COD。结果表明，CSW的微波热解是生产高质量生物炭作为POME处理吸附剂的一种有前途的技术。
