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首页> 外文会议>Water Environment Federation annual technical exhibition & conference;WEFTEC 2002 >EVALUATION OF A SEQUENTIAL FEEDING SCHEME FOR TEMPERATURE-PHASED ANAEROBIC DIGESTION (TPAD) SYSTEM TREATING MUNICIPAL SLUDGE
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EVALUATION OF A SEQUENTIAL FEEDING SCHEME FOR TEMPERATURE-PHASED ANAEROBIC DIGESTION (TPAD) SYSTEM TREATING MUNICIPAL SLUDGE

机译：阶段性厌氧消化（TPAD）系统处理城市污泥的顺序喂料方案的评估

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The stability and performance of a sequential batch Temperature-Phased AnaerobicDigestion (TPAD) scheme aimed at satisfying the 40 CFR Part 503 Class A time-temperaturerequirements (24 hours at 55 oC) were evaluated. The system, fed with a 40:60 mixture (dryweight basis) of primary sludge and waste activated sludge at 5.5% total solids, showedstable performance at system retention times as short as 12 days. The maximum volatilesolids removal (VSR) of 49.6% was achieved at a system retention time of 16 days. Thesystem did not show any effects of shock loading at the retention times studied and thesystem performance was comparable to a semi-continuously fed TPAD system. Thesequential-batch TPAD system outperformed a “conventional” single stage mesophilicsystem operated at a longer retention time with respect to VSR. The methane recoveryefficiency of the system ranged from 0.62 – 0.65 liter methane per gram of volatile solidsdestroyed, which was comparable to the single-stage mesophilic system.
机译：评估了旨在满足40 CFR Part 503 A类时间-温度要求（在55 oC时为24小时）的顺序分批分期厌氧消化（TPAD）方案的稳定性和性能。该系统以总固含量为5.5％的固体污泥和废活性污泥的40:60混合物（以干重计）进料，在短至12天的系统保留时间内表现出稳定的性能。在系统保留时间为16天时，最大挥发物去除量（VSR）为49.6％。该系统在研究的保留时间内未显示冲击载荷的任何影响，并且系统性能与半连续进料的TPAD系统相当。相对于VSR，这些常规批次TPAD系统优于在更长的保留时间下运行的“常规”单级中温系统。该系统的甲烷回收效率为每克被破坏的挥发性固体0.62 – 0.65升甲烷，与单级中温系统相当。

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