ABSTRACT Anaerobic side-stream reactors (ASSR) have been suggested to reduce waste activated sludge volumes benefiting from relatively low capital/operation costs and design simplicity. In this study, an evaluation of the feasibility of combining the ASSR system with the lysis-cryptic growth (ozonation) process was made so that a part of the sludge which passed through the ASSR anaerobic tank would be then treated by ozonation before returned to the aeration tank. The main independent factor was the ozonation flowrate (OFR), which is defined as the percent of return sludge which passed through the both the anaerobic tank and the ozonation unit. Three systems were studied, an ASSR control without ozonation (OFR-0), a combined ASSR with ozonation designated as OFR-2.5 (anaerobic interchange rate [AIR] of 10% per day and 25% of the exchanged sludge being ozonated [ozone interchange rate or OIR]), and OFR-3.1 (AIR = 12.5%, OIR = 25%). The results revealed that the insertion of an ozonation step led to an enhanced total microbial activity, eukaryotic population, and nitrogen removal. The linear relationship between the observed yield and the specific oxygen uptake rate indicated that microbial predation was the major relevant mechanism for the enhanced sludge reduction. The results of measurements of particle size distribution, and sludge dewaterability rates suggest that additional studies are needed to better understand and optimize this system. Graphical Abstract

中文翻译：

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与厌氧侧流反应器 (SBR-ASSR) 耦合的裂解-隐性生长（污泥臭氧化）和序批式反应器的综合方法：性能和特征

摘要厌氧侧流反应器 (ASSR) 已被建议减少废弃活性污泥量，受益于相对较低的资本/运营成本和设计简单性。在这项研究中，评估了将 ASSR 系统与溶解-隐性生长（臭氧化）过程相结合的可行性，以便通过 ASSR 厌氧池的一部分污泥在返回到曝气池。主要的独立因素是臭氧化流速 (OFR)，它定义为通过厌氧池和臭氧化装置的回流污泥的百分比。研究了三个系统，一个没有臭氧化的 ASSR 控制 (OFR-0)，一个带有臭氧化的组合 ASSR，称为 OFR-2。5（每天 10% 的厌氧交换率 [AIR] 和 25% 的交换污泥被臭氧化 [臭氧交换率或 OIR]）和 OFR-3.1（AIR = 12.5%，OIR = 25%）。结果表明，臭氧化步骤的插入导致总微生物活性、真核生物种群和氮去除的增强。观察到的产量和比吸氧率之间的线性关系表明微生物捕食是增强污泥减量的主要相关机制。粒度分布和污泥脱水率的测量结果表明，需要进行更多研究以更好地了解和优化该系统。图形概要 结果表明，臭氧化步骤的插入导致总微生物活性、真核生物种群和氮去除的增强。观察到的产量和比吸氧率之间的线性关系表明微生物捕食是增强污泥减量的主要相关机制。粒度分布和污泥脱水率的测量结果表明，需要进行更多研究以更好地了解和优化该系统。图形概要 结果表明，臭氧化步骤的插入导致总微生物活性、真核生物种群和氮去除的增强。观察到的产量和比吸氧率之间的线性关系表明微生物捕食是增强污泥减量的主要相关机制。粒度分布和污泥脱水率的测量结果表明，需要进行更多研究以更好地了解和优化该系统。图形概要 粒度分布和污泥脱水率的测量结果表明，需要进行更多研究以更好地了解和优化该系统。图形概要 粒度分布和污泥脱水率的测量结果表明，需要进行更多研究以更好地了解和优化该系统。图形概要