College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
Bioresour Technol. 2019 May;279:108-116. doi: 10.1016/j.biortech.2019.01.115. Epub 2019 Jan 24.
This study reported a novel and high-efficient pretreatment method for anaerobic digestion, i.e., combining calcium peroxide (CaO) with ultrasonic (US), by which not only the methane production was remarkably improved but also the removal of refractory organic contaminants was enhanced. Experimental results showed the optimum condition for methane production was achieved at 0.1 g CaO/g VSS combined with US (1 W/ml, 10 min). Under this condition, the maximal methane yield of 211.90 ± 2.6 L CH/kg VSS was obtained after 36 d of anaerobic digestion, which was respectively 1.36-fold, 1.19-fold and 1.26-fold of that from the control, solo US (1 W/ml, 10 min) and solo CaO (0.1 g/g VSS). Mechanism investigations revealed that CaO + US not only improved the disintegration of waste activated sludge (WAS) but also increased the proportion of biodegradable organic matters. Moreover, the total frequency of recalcitrant contaminants contained in WAS decreased significantly when CaO + US was applied.
本研究报道了一种新型且高效的厌氧消化预处理方法，即过氧钙（CaO）与超声（US）联合使用，不仅显著提高了甲烷产量，而且增强了难生物降解有机污染物的去除效果。实验结果表明，甲烷产量的最佳条件是 0.1gCaO/gVSS 与 US（1W/ml，10min）联合使用。在此条件下，经过 36d 的厌氧消化，获得了 211.90±2.6LCH/kgVSS 的最大甲烷产量，分别是对照、单独 US（1W/ml，10min）和单独 CaO（0.1g/gVSS）的 1.36 倍、1.19 倍和 1.26 倍。机理研究表明，CaO+US 不仅改善了废活性污泥（WAS）的解体，而且增加了可生物降解有机物的比例。此外，当使用 CaO+US 时，WAS 中所含的难降解污染物的总频率显著降低。
