文章摘要
厌氧消化与两级串联SNAD-IFAS组合工艺处理垃圾渗滤液的研究
Anaerobic digestion combined two step tandem-type SAND-IFAS process for treatment of landfill leachate
投稿时间：2020-02-29  修订日期：2020-04-20
DOI：
中文关键词: 垃圾渗滤液  厌氧消化  SNAD-IFAS  脱氮除碳  微生物群落结构
英文关键词: Landfill leachate  Anaerobic digestion  SNAD-IFAS  Carbon and nitrogen removal  Microbial community structure
基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）
作者单位邮编
徐晓晨* 大连理工大学环境学院 116023
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中文摘要:
      利用厌氧反应器（UASB）与固定生物膜-活性污泥（IFAS）反应器探究厌氧消化、同步亚硝化-厌氧氨氧化-反硝化（SNAD）工艺对垃圾渗滤液的除碳、脱氮效果。控制UASB的温度为32℃，pH值为8.0-8.3，在HRT为24 h时COD去除率为44.9%，出水C/N比在1.3:1左右，完全可以满足后续SNAD工艺的进水需求。两级串联SNAD-IFAS反应器共运行96 d，UASB出水稀释后作为SNAD系统的进水。独立调控两池的温度、DO、pH，SNAD1池分别为32℃、0.1-0.2 mg·L-1、7.8-8.0，SNAD2池分别为32℃、0.08-0.14 mg·L-1、7.6-7.9。在进水TN和COD浓度分别为602.3 mg·L-1和878.1 mg·L-1时，SNAD系统对TN和COD的去除率分别达到83.3%和39.4%。高通量测序结果表明反应器内具有典型的SNAD工艺微生物群落结构，AOB主要存在于活性污泥中，AnAOB和DNB主要富集在生物膜上。SNAD1池与SNAD2池的生物膜均以AnAOB作为优势菌种，其丰度分别达到26.21%和30.82%。
英文摘要:
      An integrated configuration combining UASB with the simultaneous partial nitrification, anammox and denitrification-integrated fixed biofilm activated sludge (SNAD-IFAS) was constructed for the treatment of landfill leachate. The temperature and pH of UASB were controlled at 32℃ and 8.0-8.3, respectively. The removal efficiency of COD reached 44.9% when the HRT was 24h and the C/N ratio was around 1.3:1 which could meet the requirement of SNAD process completely. The two-stage tandem-type SNAD-IFAS reactors were operated for 96d and it was using the diluted effluent of UASB as the inlet. The temperature, DO and pH were regulation independently which was 32℃, 0.1-0.2 mg·L-1 and 7.8-8.0 in SNAD1, as 32℃, 0.08-0.14 mg·L-1 and 7.6-7.9 in SNAD2. In stable phase, the TN and COD removal efficiency of SNAD process were 83.3% and 39.4% with the concentration of TN and COD reached 602.3 mg·L-1 and 878.1 mg·L-1, respectively. The result of high-throughput pyrosequencing indicated that the typical microbial community structure of SNAD process was formed in the reactors. Ammonium oxidizing bacteria (AOB) tends to grow in the suspended sludge while the anaerobic ammonium-oxidizing bacteria (AnAOB) enriched in biofilms. The biofilms in SNAD1 and SNAD2 were both dominated by AnAOB, which abundance attained 26.21% and 30.82%, respectively.
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