College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
Bioresour Technol. 2018 Feb;249:298-306. doi: 10.1016/j.biortech.2017.10.043. Epub 2017 Oct 10.
Effects of ultrasonic pretreatment and packing carriers on sludge reduction, settleability, dewaterability and microbial community structure in the anaerobic side-stream reactor (ASSR) were investigated with three anaerobic reactors operated in parallel. Ultrasonication from 3.65% in the ASSR to 5.08%, and packing carriers further enhanced the efficiency to 19.2%. Ultrasonic pretreatment of sludge decreased oxidation-reduction potential in ASSR and enhanced the release of intracellular substances. The deterioration of sludge settleability and dewaterability in the ASSR after ultrasonic pretreatment was improved by packing carriers. Illumina-MiSeq sequencing showed that microbial richness and diversity increased after ultrasonic pretreatment and packing carriers in the ASSR. Packing carriers favored the growth of slow grower (Dechloromonas), fermentative bacteria (Draconibacteriaceae, Fusibacter, Acidaminobacter) and floc-forming bacteria (Zoogloea), while hydrolytic and predatory bacteria (Saprospiraceae_unculture) and slow grower (Thauera) was enriched in the ASSR.
采用三组平行运行的厌氧反应器，研究了超声预处理和包装载体对厌氧侧流反应器（ASSR）中污泥减量化、沉降性、脱水性能和微生物群落结构的影响。ASSR 中的超声从 3.65%增加到 5.08%，进一步通过包装载体增强效率至 19.2%。污泥超声预处理降低了 ASSR 中的氧化还原电位，并增强了细胞内物质的释放。包装载体改善了超声预处理后 ASSR 中污泥沉降性和脱水性能的恶化。Illumina-MiSeq 测序显示，超声预处理和 ASSR 中的包装载体增加了微生物的丰富度和多样性。包装载体有利于缓慢生长菌（脱氯菌）、发酵菌（Draconibacteriaceae、Fusibacter、Acidaminobacter）和絮状菌（Zoogloea）的生长，而水解菌和捕食菌（Saprospiraceae_unculture）和缓慢生长菌（Thauera）在 ASSR 中富集。
