沼渣生物炭在水处理中的应用进展

Advances in application of biochar derived from biogas digestate in water treatment

摘要:

以沼渣为原料制备生物炭是实现沼渣安全处置和资源化利用的有效途径之一。沼渣经过厌氧消化处理，在一定程度上优化了沼渣生物炭的组分结构和物化特性，因而沼渣生物炭具有低成本、来源广、吸附及催化性能好等特点被应用于去除水中污染物。该文对当前沼渣生物炭的原料来源、制备及改性方法进行了总结，归纳了沼渣生物炭作为吸附剂和碳基催化剂在水处理应用中的现状，同时阐述了沼渣生物炭的作用机理。最后总结了沼渣生物炭在水处理应用中存在的一些问题和挑战，并指出其发展方向。

Abstract:

The production of biochar from biogas digestate is one of the effective ways to achieve its safe disposal and resource utilization. The component structure and physicochemical properties of digestate-derived biochar are optimized to some extent with anaerobic digestion of digestate. Therefore, the digestate-derived biochar with low cost, wide source, good adsorption and catalytic properties is applied to remove pollutants from water. In this paper, the feedstock sources, preparation and modification methods of digestate-derived biochar are summarized. Besides, the current status of digestate-derived biochar as adsorbent or carbon-based catalyst in water treatment is discussed. In addition, the mechanism of pollutant removal by digestate-derived biochar is described. Finally, some problems and challenges of the application of digestate-derived biochar in water treatment is proposed, and the development direction of its application in aquatic environment is pointed out.