文章摘要
李倩,全燮,刘涛,于洪涛,白杨.硅藻土改性载体加速移动床生物膜反应器启动研究[J].,2015,55(4):358-365
硅藻土改性载体加速移动床生物膜反应器启动研究
Research on diatomite-modified carrier for accelerating start-up of moving bed biofilm reactor
  
DOI：10.7511/dllgxb201504004
中文关键词: 移动床生物膜反应器  挂膜  硅藻土改性载体  亲水性
英文关键词: moving bed biofilm reactor (MBBR)  biofilm formation  diatomite-modified carrier  hydrophilicity
基金项目:国家水体污染控制与治理科技重大专项资助项目(2012ZX07202-006-004).
作者单位
李倩,全燮,刘涛,于洪涛,白杨  
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中文摘要:
      聚乙烯(polyethylene，简称PE)载体存在挂膜速度慢、附着生物膜活性低以及水处理效果差等缺点．通过添加硅藻土改善PE载体的亲水性，改性后载体的接触角由94.3°降低至77.8°．在移动床生物膜反应器(moving bed biofilm reactor，简称MBBR)工艺挂膜启动过程中，相同条件下，相比于PE载体，硅藻土改性载体表面附着的生物膜具有较高的蛋白质和多糖含量，表明附着在硅藻土改性载体上的生物膜生物活性较高．生物膜生长稳定后，反应器R1(填充硅藻土改性载体)内总生物量比反应器R2(填充PE载体)内总生物量高35.6%，硅藻土改性载体表面附着的生物膜量比PE载体的高62.3%．相应的，挂膜启动过程中，反应器R1的COD和氨氮去除率也高于反应器R2．上述硅藻土改性载体在挂膜性能和水处理性能方面的优势，缩短了反应器R1的启动时间．
英文摘要:
      There are many limitations for polyethylene (PE) carrier, such as slow biofilm formation, low activity of the attached biofilm and poor wastewater treatment performance. It is demonstrated that the hydrophilicity of the PE carrier can be improved by doping diatomite and that the contact angle of the diatomite-modified carrier decreases to 77.8° from 94.3° of the PE carrier. Compared with the PE carrier, the diatomite-modified carrier has higher concentrations of both protein and polysaccharide in the attached biofilm under the same conditions during the start-up period of the moving bed biofilm reactor (MBBR) process, which indicates that the attached biofilm on the diatomite-modified carrier exhibits better biological activity. After biofilm grows mature, the total biomass in the reactor 1 (R1, filled with diatomite-modified carriers) is 35.6% higher than that in the reactor 2(R2, filled with PE carriers), and the amount of the attached biofilm on the diatomite-modified carriers is 62.3% higher than that on the PE carriers. Additionally, during the start-up period both COD and ammonium removal of R1 are also better than those of R2, respectively. All these advantages of the diatomite-modified carrier in biofilm formation and wastewater treatment performance contribute to shortening the start-up period of the MBBR process.
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