| 张勇,胡群林,王涛,徐广松.蜂巢石强化 UASB 反应器处理垃圾渗滤液研究[J].安徽建筑大学学报,2021,29(3):26-31 |
| 蜂巢石强化 UASB 反应器处理垃圾渗滤液研究 |
| Study on Enhancement of UASB Reactor for Treating Incineration Leachate by Pumice |
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| DOI： |
| 中文关键词: 蜂巢石 UASB 产甲烷丝菌 渗滤液 |
| 英文关键词: Pumice UASB Methanosaeta Leachate |
| 基金项目:2019 年国家重点研发计划项目（2019YFC0408504）；安徽省高校自然科学研究项目（KJ2018ZD048）；中国科学院科技服务网
络计划区域重点项目（KFJ-STS-QYZD-173） |
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| 中文摘要: |
| 向厌氧系统中投加载体材料是提升反应器稳定性及厌氧效率的有效手段。本试验将蜂巢石投加到上流式污泥床反应器（UASB）中，研究其对垃圾焚烧发电厂渗滤液厌氧消化效率的影响及厌氧污泥中产甲烷菌群落结构的变化。试验结果显示，投加蜂巢石缩短了 UASB 污泥驯化时间，与未投加蜂巢石的反应器相比，CODCr 去除率提前 12 天稳定达到 85% 以上；污泥形貌观察及粒径分布测试表明，蜂巢石作为固定微生物的载体能够有效加速污泥颗粒化进程，运行至第 15 天，投加蜂巢石的反应器中粒径大于 0.2 mm 的污泥占比 53.17%，高于未投加蜂巢石反应器的 31.92%，形成了更加密实、更大的颗粒污泥。当有机负荷逐步提升至 28.77 kgCODCr/（m3·d）时，投加蜂巢石的反应器 CODCr 去除率仍稳定达到 97%，所能承受的最大有机负荷是未投加蜂巢石反应器的 2 倍以上。高通量测序表明，有机负荷提升后，投加蜂巢石反应器中产甲烷丝菌（Methanosaeta）代替产甲烷杆菌（Methanobacterium）成为优势种属。 |
| 英文摘要: |
| Addition of the loading material to the anaerobic system is an effective way to improve the stability and anaerobic efficiencyof the reactor.In this work，pumice was added to the upflow sludge bed reactor （UASB） to study its effects on anaerobic digestionefficiency of the leachate from municipal solid waste incineration power plant and structural changes of methanogens community inanaerobic sludge.The experimental results showed that adding pumice could shorten the acclimation time of the sludge，in which ittook 12 days less than the reactor without pumice to reach the CODCr removal efficiency above 85%.Meanwhile，the observation ofthe sludges’ morphology and the distribution of particle size demonstrated that pumice as the carrier for fixing microorganism couldaccelerate the granulation process of sludge，On the 15th day of operation，the sludge with a particle size larger than 0.2 mm accountedfor 53.17% in the reactor with added pumice，which was higher than 31.92% of the reactor without pumice，forming more dense andlarger granular sludge.Finally，it was found that the high organic loading rate impact ability of UASB reactor was strenghtened by addingpumice.When the organic loading rate was increased to 28.77 kgCODCr/（m3·d），the CODCr removal efficiency of the reactor with pumice could still keep 97%，which indicated that the maximum organic load of the reactor was more than twice that of the reactorwithout pumice.To further investigate of the anti high organic loading rate impact ability，the high-throughput sequencing was carriedout，which showed that the Methanosaeta became the dominant methanogenic bacteria instead of Methanobacterium in the reactor withpumice after increasing the organic loading rate. |
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