What could the entire cornstover contribute to the enhancement of waste activated sludge acidification? Performance assessment and microbial community analysis.
What could the entire cornstover contribute to the enhancement of waste activated sludge acidification? Performance assessment and microbial community analysis.
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整个玉米秸秆对加强废弃活性污泥酸化有何贡献？
DOI：
10.1186/s13068-016-0659-y
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发表时间：
2016
影响因子：
6.3
通讯作者：
Yue X
中科院分区：
文献类型：
--
作者：
Zhou A;Zhang J;Wen K;Liu Z;Wang G;Liu W;Wang A;Yue X
研究背景废弃活性污泥（WAS）消化产生挥发性脂肪酸（VFAs）受到营养成分不平衡（低碳氮比）的限制。据报道，通过额外的碳源（通常在原料固体的混合物中）进行特性调节是增强WAS酸化的有效方法。然而，很少有人注意到其他调整形式的贡献。此外，相应的生态估计尚未调查you.ResultsIn这项研究中，玉米秸秆（CS）的调节与三种调整形式[预处理秸秆（S），水解液（H）和水解液+秸秆（HS）]在提高VFAs生产从WAS的可行性进行了论证。结果表明，H共消化法的VFAs产率最高（574 mg COD/g VSS），而单独消化法的VFAs产率仅为392 mg COD/g VSS。VFAs的组成是强烈的调整形式依赖性，因为更多的乙酸（HAc）和丙酸（HPr）分别在CS_HS和S中产生。高通量测序分析表明，酸（特别是HAc）产生特征属（拟杆菌属、类蛋白菌属和河流生菌属）和产HPr的特征属结论玉米秸秆预处理显著提高了WAS的酸化性能，尤其是CS_H调节型，VFAs产量明显高于文献报道。CS调节形式在构建WAS中的固有微生物群落中发挥了重要作用。典型相关分析表明，一定含量的纤维素、半纤维素或其糖化水解产物可富集水解酸化能力较强的特征菌。此外，生态估算表明，就每英亩的整个CS（包括S和H）而言，WAS处理能力将达到100万mts容量的污水处理厂（WWTP）每天的产量。这些研究结果可能对污水处理厂的运营产生重要影响。
BackgroundVolatile fatty acids (VFAs) production from waste activated sludge (WAS) digestion is constrained by unbalanced nutrient composition (low carbon-to-nitrogen ratio). Characteristics conditioning by extra carbon sources, normally in the mixture of raw solid, has been reported to be an efficient approach to enhance WAS acidification. However, little attention has been paid to the contributions of other adjustment forms. Moreover, the corresponding ecological estimation has not been investigated yet.ResultsIn this study, the feasibility of corn stover (CS) conditioning with three adjustment forms [pretreated straw (S), hydrolysate (H) and hydrolysate + straw (HS)] in improving VFAs production from WAS was demonstrated. It was observed that the highest VFAs yield was achieved in H co-digesting test (574 mg COD/g VSS), while it was only 392 mg COD/g VSS for WAS digesting alone. VFAs composition was strongly adjustment form-dependent, as more acetic (HAc) and propionic (HPr) acids were generated in CS_HS and S, respectively. High-throughput sequencing analysis illustrated that acid (especially HAc)-producing characteristic genera (Bacteroides,ProteiniclasticumandFluviicola) and HPr-producing characteristic genera (Mangroviflexus andPaludibacter) were detected by CS_HS and S conditioning, respectively.ConclusionsCorn stover conditioning greatly upgraded the WAS acidification performance, especially for the CS_H adjustment form, and the VFAs yield gained was considerably larger than that previously reported. CS adjustment forms played an important role in structuring the innate microbial community in WAS. Canonical correlation analysis illustrated that characteristic genera, with better hydrolysis and acidification abilities, could be enriched by the feedstocks with certain content of cellulose, hemicellulose or their saccharification hydrolysates. Moreover, ecological estimation revealed that, as far as the entire CS (including S and H) per acre was concerned, the capacity of WAS treatment would reach that produced in a one million mts capacity wastewater treatment plants (WWTPs) per day. These findings may have crucial implications for the operation of WWTPs.
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DOI：
10.1099/ijs.0.044719-0
发表时间：
2013-06
影响因子：
2.8
作者：
Looft T;Levine UY;Stanton TB
通讯作者：
Stanton TB
影响因子：
11.4
作者：
Hidaka, Taira;Arai, Sayuri;Uchida, Tsutomu
通讯作者：
Uchida, Tsutomu
影响因子：
11.4
作者：
Jiang, Yamin;Chen, Yinguang;Zheng, Xiong
通讯作者：
Zheng, Xiong
澄清废弃活性污泥处理过程中与pH相关的磷组分和磷释放增强机制
影响因子：
11.4
作者：
He, Zhang-Wei;Liu, Wen-Zong;Wang, Ai-Jie
通讯作者：
Wang, Ai-Jie
影响因子：
12.8
作者：
Lopez-Vazquez, Carlos M.;Oehmen, Adrian;van Loosdrecht, Mark C. M.
通讯作者：
van Loosdrecht, Mark C. M.