在批式消化器中，用不同的木质纤维素废物进行中温厌氧共消化剩余污泥。
Mesophilic anaerobic co-digestion of residual sludge with different lignocellulosic wastes in the batch digester.
机构信息
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing 400045, PR China.
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing 400045, PR China.
出版信息
Bioresour Technol. 2018 Nov;268:371-381. doi: 10.1016/j.biortech.2018.07.129. Epub 2018 Jul 27.
Co-digestion of residual sludge (RS) and different lignocellulosic wastes (LWs) including greening waste (GW), decocted Chinese herbs waste (DCHW) and sugarcane bagasse waste (SCBW) was investigated in batch digester. Results show that the application of GW presented the highest specific methane yield (161 mL CH/g VS) due to its high carbohydrate fraction and more balanced C/N ratio in co-substrate mixture. Buswell equation was applied and it is found that biodegradability index (BI) for co-digestion varied from 68.1% to 74.2% (53.0% for RS mono-digestion) depending on the lignin fractions of the LWs. Variation of pH, VFAs, alkalinity and ammonia throughout the digestion were also examined. The addition of LWs induced VFAs formation, as well as their conversion to methane. The higher microbial diversity in RS/LWs co-digestion further confirmed the positive effect of LWs addition in co-digestion.
采用批式消化器研究了剩余污泥（RS）与不同木质纤维素废物（LWs）的共消化，这些 LWs 包括绿化废物（GW）、煮过的中草药废物（DCHW）和甘蔗渣废物（SCBW）。结果表明，由于 GW 中的碳水化合物含量较高，共基质混合物中的 C/N 比例更均衡，因此其应用表现出了最高的特定甲烷产量（161 mL CH/g VS）。应用巴斯韦尔方程发现，共消化的生物降解指数（BI）根据 LWs 中的木质素分数在 68.1%至 74.2%之间变化（RS 单消化为 53.0%）。还检查了消化过程中 pH 值、VFAs、碱度和氨的变化。LWs 的添加诱导了 VFAs 的形成，以及它们向甲烷的转化。RS/LWs 共消化中更高的微生物多样性进一步证实了 LWs 添加在共消化中的积极作用。
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