Institute of Thermal Technology, Silesian University of Technology, 44-100, Gliwice, Poland.
Environ Sci Pollut Res Int. 2019 Dec;26(35):35422-35432. doi: 10.1007/s11356-019-05897-2. Epub 2019 Jul 22.
Sewage sludge (SS) is a by-product of wastewater treatment plant (WWTP) operation. Due to fast rates of urbanization and industrialization, and rapid population growth, the world community faces a serious challenge associated with its disposal. There is an urgent need to explore low cost, energy efficient, and sustainable solutions for the treatment, management, and future utilization of SS. Thermal conversion of SS is considered the most promising alternative for sustainable SS management. Among three main thermochemical processes, it seems that gasification (GAS) of SS has the most advantages. The aim of this paper is a presentation of the gasification process as a sustainable method of SS management that takes into account the idea of a circular economy (CE). Gaseous fuel production, phosphorus recovery potential, and solid adsorbent production during the gasification process are analyzed and discussed. Result of this study shows that the lower heating value (LHV) of the gas from SS GAS process is up to 5 MJ/m and it can be effectively utilize in an internal combustion engines. The analysis proved that solid fraction after the SS GAS process can be treated as a valuable phosphorus source and perspective adsorbent materials. The amount of PO in this material was equal to 22.06%. It is similar to natural phosphate rocks (28.05%). The maximum of the adsorption capacity of the phenol was comparable with commercial activated carbon (CAC): 42.22 mg/g for solid fraction after SS GAS and 49.72 mg/g for CAC. Graphical abstract.
污水污泥 (SS) 是废水处理厂 (WWTP) 运行的副产品。由于城市化和工业化的快速发展以及人口的快速增长，世界社会面临着与其处置相关的严重挑战。迫切需要探索低成本、高能效和可持续的解决方案，用于 SS 的处理、管理和未来利用。SS 的热转化被认为是 SS 可持续管理的最有前途的替代方法。在三种主要的热化学工艺中，似乎 SS 的气化 (GAS) 具有最多的优势。本文的目的是介绍气化工艺作为 SS 管理的可持续方法，该方法考虑到循环经济 (CE) 的理念。分析和讨论了气化过程中气态燃料的生产、磷的回收潜力和固体吸附剂的生产。该研究的结果表明，SS GAS 工艺产生的气体的低热值 (LHV) 高达 5MJ/m，可有效在内燃机中使用。分析证明，SS GAS 工艺后的固体部分可作为有价值的磷源和有前途的吸附材料进行处理。该材料中的 PO 量等于 22.06%。与天然磷矿 (28.05%) 相似。酚的最大吸附容量与商业活性炭 (CAC) 相当：SS GAS 后固体部分为 42.22mg/g，CAC 为 49.72mg/g。
