摘要
采用物理吸附的方式对用于石化废水处理的聚氨酯泡沫球形载体的挂膜方法进行了研究。直接挂膜时,投加石化废水生物处理剂后,载体出现了严重的堵塞现象,孔隙内无机颗粒含量较高,生物多样性差,从而无法保持稳定的石化废水处理效果。通过分析聚氨酯泡沫表层和孔隙内部附着的生物量及孔隙内附着物的粒度分布,采取间接挂膜法,即采用投加颗粒状物质活性炭、电气石及酵母粉的方式,对聚氨酯泡沫球形载体进行预挂膜后,再投加生物处理剂,进行进一步的挂膜。结果表明：间接挂膜法可有效地避免载体的堵塞问题,使得孔隙内部附着生长大量的活性微生物,从而在石化废水进水COD和NH4＋-N浓度在280-420 mg/L和5-25 mg/L时,出水COD和NH4^＋-N浓度分别稳定在70 mg/L和3 mg/L以下。
Physical adsorption method was applied for biofilm development on the spherical carrier of polyurethane foams treating petrochemical wastewater. After the petrochemical wastewater biological treatment agent being added directly into the reactor, serious clogging problem occurred with high content of inorganic substance lacking in biodiversity in the pores. Thus, the reactor failed to keep stable treatment efficiency. According to the results of biomass attached on the surface and in the pores of the carrier as well as the granularity distribution of the substances trapped in the pores, indirect method was employed, i. e. , granular substances like activated carbon, tourmaline and yeast was put into the system for the pre-coating of the carrier. Then biofilm was further developed after the introduction of biological treatment agent. The results indicated that indirect biofilm formation method could effectively avoid the clogging of the carrier with the attachment of abundant active microorganisms within the pores. When the concentrations of the influent COD and NH4^＋-N were varied in 280 -420 mg/L and 5 -25 mg/L, the corresponding effluent could keep stable below 70 mg/L and 3 mg/L, respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2008年第10期1322-1326,共5页
Chinese Journal of Environmental Engineering
基金
黑龙江省科技计划资助项目(CC05S301)
关键词
聚氨酯泡沫
颗粒物质
挂膜
石化废水
polyurethane foams
granular substances
biofilm formation
petrochemical wastewater
