CAJ | 학술논문

采用化学氧化-铁离子覆盖改性方法对普通聚氨酯泡沫塑料填料进行改性,研究改性前后填料的表面特性、挂膜速度、生物膜量以及废水处理等性能。结果表明,改性填料表面的疏水性基团C—C、C—H比例下降了15.81%,亲水性基团C—O比例增加了16.17%,填料表面与蒸馏水的动态接触角减少了10.46°,其表面粗糙度以及亲水性提高。与未改性填料相比,改性填料生物膜量提高60%,生物膜平均每天生长量提高50%,但其生物膜脱氢酶活性并未明显提高。挂膜初期改性填料的COD和氨氮去除效果明显占优,挂膜完成后,改性填料对氨氮去除率比未改性填料高10%。
채용화학양화-철리자복개개성방법대보통취안지포말소료전료진행개성,연구개성전후전료적표면특성、괘막속도、생물막량이급폐수처리등성능。결과표명,개성전료표면적소수성기단C—C、C—H비례하강료15.81%,친수성기단C—O비례증가료16.17%,전료표면여증류수적동태접촉각감소료10.46°,기표면조조도이급친수성제고。여미개성전료상비,개성전료생물막량제고60%,생물막평균매천생장량제고50%,단기생물막탈경매활성병미명현제고。괘막초기개성전료적COD화안담거제효과명현점우,괘막완성후,개성전료대안담거제솔비미개성전료고10%。
A surface modification method,chemical oxidation-surface covering with iron ion,was used to modify the polyurethane（PU） foam plastics bio-carrier.And surface properties of the bio-carrier,speed of biofilm formation,quantity of biological film and performance of treating wastewater were investigated before and after modification.The results showed that the ratio of the hydrophobic C-C,C-H bond on the surface of the modified bio-carrier was reduced by 15.81%,and the ratio of the hydrophilic C-O bond on the surface of the modified bio-carrier has increased by 16.17%.The dynamic contact angle of water against the bio-carrier surface was decreased by 10.46°.The surface roughness and hydrophilicity of the bio-carrier were enhanced.Comparing modified bio-carrier with the original bio-carrier,the quantity of biofilm increased by 60%,and the average growth rate of biological film increased by 50%.But the TTC-DHA of modified bio-carrier hardly increased.At the stage of biofilm formation,the performance of COD and ammonia removal of the modified bio-carrier was better than the original bio-carrier.After completion of biofilm formation,the removal efficiency of COD was almost the same,but the removal efficiency of ammonia increased by 10%.