Dauknys Regimantas, Rimeika Mindaugas, Jankeliūnaitė Eglė, Mažeikienė Aušra
a Department of Water Management , Vilnius Gediminas Technical University , Vilnius , Lithuania.
Environ Technol. 2016 Nov;37(21):2768-72. doi: 10.1080/09593330.2016.1164250. Epub 2016 Mar 30.
The anaerobic sludge digestion is a widely used method for sludge stabilization in wastewater treatment plant. This process can be improved by applying the sludge disintegration methods. As the sludge disintegration is not investigated enough, an analysis of how the application of thermal hydrolysis affects the sludge digestion process based on full-scale data was conducted. The results showed that the maximum volatile suspended solids (VSS) destruction reached the value of 65% independently on the application of thermal hydrolysis. The average VSS destruction increased by 14% when thermal hydrolysis was applied. In order to have the maximum VSS reduction and biogas production, it is recommended to keep the maximum defined VSS loading of 5.7 kg VSS/m(3)/d when the thermal hydrolysis is applied and to keep the VSS loading between 2.1-2.4 kg VSS/m(3)/d when the disintegration of sludge is not applied. The application of thermal hydrolysis leads to an approximately 2.5 times higher VSS loading maintenance comparing VSS loading without the disintegration; therefore, digesters with 1.8 times smaller volume is required.
厌氧污泥消化是污水处理厂中广泛使用的污泥稳定化方法。该过程可通过应用污泥解体方法加以改进。由于对污泥解体的研究不够充分，基于实际运行数据对热水解应用如何影响污泥消化过程进行了分析。结果表明，无论是否应用热水解，挥发性悬浮固体（VSS）的最大破坏率均达到65%。应用热水解时，VSS的平均破坏率提高了14%。为了实现最大的VSS减少量和沼气产量，建议在应用热水解时将最大规定VSS负荷保持在5.7 kg VSS/m³/d，在不进行污泥解体时将VSS负荷保持在2.1 - 2.4 kg VSS/m³/d。与不进行解体的VSS负荷相比，热水解的应用使VSS负荷维持能力提高了约2.5倍；因此，所需消化池体积减小1.8倍。
