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Comparative study of the bio-remediation of eutrophic river water, using two biofilm processes

机译：两种生物膜法对富营养化河水的生物修复的比较研究

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Filamentous bamboo and plastic filling were used as biofilm carriers for the bio-remediation of nitrogenous compounds from eutrophic river water. Two corresponding biofilm reactors were developed: a filamentous bamboo reactor (FBR) and a plastic filling reactor (PFR). Experimental results indicated that the average removal rates of total nitrogen (TN), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3--N), nitrite nitrogen (NO2--N), chemical oxygen demand using KMnO4 as oxidizer (CODMn) and chlorophyll A were 63.86%, 47.80%, 64.75%, 20.00%, 63.50% and 58.36% for FBR, and 11.29%, 18.24%, 43.90%, -165%, 9.56% and 15.25% for PFR, respectively. Statistically significant differences between FBR and PFR (p < 0.05) were noted in TN, NH4+-N, NO3--N, NO2--N and CODMn. The results showed that NO2--N was associated with accumulation phenomena in the PFR. It was also noted that the observed diversity of microorganisms (Protozoa and Metazoa) and the biomass of nitrifying bacteria and denitrifying bacteria were higher on the filamentous bamboo than that on the plastic filling (p < 0.05). These results suggest that filamentous bamboo may be a potential carbon source that could be used for glucose-replacement during de-nitrification.
机译：丝状竹纤维和塑料填充物被用作生物膜载体，用于从富营养化河水中生物修复含氮化合物。开发了两个相应的生物膜反应器：丝状竹制反应器（FBR）和塑料填充反应器（PFR）。实验结果表明，使用KMnO4作为氧化剂（CODMn）去除总氮（TN），铵态氮（NH4 + -N），硝酸盐氮（NO3--N），亚硝酸盐氮（NO2--N），化学需氧量的平均去除率。 ）和叶绿素A分别为FBR的63.86％，47.80％，64.75％，20.00％，63.50％和58.36％，而PFR分别为11.29％，18.24％，43.90％，-165％，9.56％和15.25％。在TN，NH4 + -N，NO3--N，NO2--N和CODMn中，FBR和PFR之间的统计学差异显着（p <0.05）。结果表明，NO2--N与PFR中的积累现象有关。还应注意的是，丝状竹上观察到的微生物（原生动物和后生动物）的多样性以及硝化细菌和反硝化细菌的生物量高于塑料填料（p <0.05）。这些结果表明丝状竹可能是潜在的碳源，可用于反硝化过程中的葡萄糖替代。

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