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| 两级SNAD-IFAS+O/A/O-MBR工艺处理市政有机固废厌氧消化沼液的研究 |
| Study on two-stage SNAD-IFAS+O/A/O MBR process for anaerobic digestion of municipal organic solid waste biogas slurry |
| 投稿时间：2024-03-25 修订日期：2024-04-11 |
| DOI： |
| 中文关键词: 厌氧消化沼液 SNAD-IFAS 脱氮除碳 游离氨 微生物群落结构 |
| 英文关键词: Anaerobic digestion of biogas slurry SNAD-IFAS Denitrification and decarbonization Free ammonia Microbial community structure |
| 基金项目:国家自然科学基金资助项目(21777018) |
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| 摘要点击次数: 14 |
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| 中文摘要: |
| 餐厨垃圾、污泥和粪便等混合市政有机固废的厌氧消化沼液具有氨氮和化学需氧量(COD)浓度高、污染物成分复杂的特点，采用传统生物处理方式难达标。针对这一问题，本研究提出了两级同步亚硝化-厌氧氨氧化-反硝化固定生物膜活性污泥工艺耦合好氧-厌氧-膜生物反应器(SNAD-IFAS+O/A/O-MBR)组合工艺处理混合市政有机固废厌氧消化沼液。整个启动过程持续129天，控制两级SNAD-IFAS溶解氧浓度分别为0.02–0.30 mg/L和0.01–0.50 mg/L。在第113–122天，进水水力停留时间为4天，出水总氮和COD最大去除率分别为88.0%和30.1%，O/A/O-MBR深度处理出水总氮低于10.0 mg/L，COD低于270.0 mg/L，工艺成功启动。高通量测序结果表明SNAD1内菌种以亚硝化菌为主，厌氧氨氧化菌主要分布在SNAD2中的填料上，硝化菌功能受到明显抑制，丰度降低，两级SNAD-IFAS+O/A/O-MBR组合工艺成功启动。 |
| 英文摘要: |
| In view of the high concentration of ammonia nitrogen and chemical oxygen demand(COD) and the complex composition of pollutants in anaerobic digestion biogas slurry of mixed municipal organic solid waste such as kitchen waste, sludge, and feces, the traditional biological treatment method is difficult to reach the standard. In this study, A two-stage simultaneous partial nitrification, anammox and denitrification-integrated fixed-film activated sludge+aerobic/anaerobic/ membrane bio-reactor (SNAD-IFAS+O/A/O-MBR) combination process was started to remove the pollutants in the biogas slurry after anaerobic digestion of mixed municipal organic solid waste. The start-up process lasted for 129 days. The influent nitrogen load was increased by gradually increasing the influent biogas slurry content and shortening the hydraulic residence time (HRT). The temperature of the two-stage SNAD-IFAS reactor was controlled to 34 ℃, and the dissolved oxygen was 0.02-0.30 mg/L and 0.01-0.50 mg/L, respectively. pH are 7.9 to 8.2 and 7.5 to 7.9, respectively. Finally, the process was successfully started, and the maximum removal rates of total nitrogen and COD in effluent were 88.0% and 44.9%, respectively. The total nitrogen and COD in effluent treated by O/A/O-MBR were lower than 89.0 mg/L and 270.0 mg/L respectively. High-throughput sequencing results showed that AOB was the main bacterial species in SNAD1, anaerobic ammoxidation bacteria (AnAOB) were enriched on the fillers in SNAD2, nitrobacteria (NOB) were significantly inhibited and their abundance decreased. The two-stage SNAD-IFAS+O/A/O-MBR process was successfully started. |
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