竹丝生物膜反应器修复校园景观水体的实验研究
Remediation of campus landscape water bodies by filamentous bamboo biocarrier reactor
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摘要: 以竹丝作为填料而组建的接触氧化生物膜工艺对校园景观水体进行易位修复，通过设置5个不同工况以探明竹丝载体在修复轻度污染水体的特性，研究表明：当进水CODMn、氨氮和浊度分别为7.79～24.32 mg/L、1.36～11 mg/L和0.63～33.11 NTU的情况下，其去除率分别为10.57%～74.34%、-83.33%～57.55%和20.01%～100%，不同的运行工况对修复效果的影响不显著；系统在启动后的8 d内即可形成丰富成熟的生物相，而且竹丝上的细菌主要以短杆菌为主；竹丝生物膜反应器修复后的景观水体中的活细菌数量可减少1个数量级。竹丝上的亲水性基团和良好的生物亲和性以及从竹丝上脱落下来的零散竹丝纤维是竹丝填料生物膜快速形成的基础，宏观和微观“网捕”结构是该系统能在极短时间实现高效去除浊度、有机物和细菌等高分子物质的主要原因。Abstract: A kind of filamentous bamboo biocarrier was applied to install contact oxidation process, and it was used to remediate translocated campus landscape water bodies,five conditions were studied on remediation feature of landscape water bodies by filamentous bamboo biocarrier.The results showed that COD,ammonia nitrogen and turbidity removal rates were 10.57%～74.34%,-83.33%～57.55% and 20.01%～100%,respectively.Bioreactor efficiencies did not fluctuate when the operation conditions were changed, and abundant biological phases could form in the system within 8 d, and short bacilus was main shape on the biocarrier.The number of the activated bacterias could decrease one order of magnitude after remediation by the filamentous bamboo biocarrier bioreactor.Hydrophilic groups, excellent biological appetency and scattered bamboo fibre are primary reasons for forming biofilm on the surface of filamentous bamboo biocarrier under lacking nutrient substrates, and macroscopical and microcosmic “netted structure”were main causes for realizing the removal of turbidity organic matters and bacterias within very short time.
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