Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
Bioresour Technol. 2019 Jun;282:331-338. doi: 10.1016/j.biortech.2019.03.029. Epub 2019 Mar 7.
Accelerants can effectively enhance the performance of anaerobic digestion (AD) system. The effects of optimized steel slag as accelerant in the AD of cow manure and the fertility utilization of the digestate were investigated. Results show that all steel slags collected from different iron and steel companies (slag-1, slag-2, and slag-3) positively affect AD performance in terms of enhancing the biogas yield, methane yield, and chemical oxygen demand (COD) degradation rate. The cumulative biogas yield, methane yield, and COD degradation rate of slag-2 are 507.29 mL/g VS, 274.70 mL/g VS, and 58.62%, respectively. Thermal analysis reveals that the digestate with steel slag has excellent thermal stability and potential application as a component of nitrogen, phosphorus, and potassium organic compound fertilizers. The use of different steel slags as accelerants in the AD system provides a safe and economical avenue to realize the resource utilization and harmless treatment of waste resource.
促进剂可有效提升厌氧消化（AD）系统的性能。本研究考察了优化后的钢渣作为促进剂在牛粪 AD 中的作用，以及消化物的肥力利用。结果表明，从不同钢铁公司收集的所有钢渣（渣-1、渣-2 和渣-3）均能通过提高沼气产量、甲烷产量和化学需氧量（COD）降解率来积极提升 AD 性能。渣-2 的累积沼气产量、甲烷产量和 COD 降解率分别为 507.29 mL/gVS、274.70 mL/gVS 和 58.62%。热分析表明，具有钢渣的消化物具有优异的热稳定性和作为氮、磷、钾有机复合肥料成分的潜在应用。将不同钢渣作为 AD 系统中的促进剂使用，为实现废物资源的资源利用和无害化处理提供了安全经济的途径。
