外排水冲洗滤布对烟草薄片废水处理站生化池的影响

Effect of Washing Filter Cloth Using Drainage Water on Biochemical Reactor in Sewage Treatment Station of Reconstituted Tobacco Sheet

中文关键词:  烟草薄片  外排水  滤布冲洗  废水回用  生化处理  生物多样性

Key Words:reconstituted tobacco sheet  drainage water  filter cloth washing  wastewater reuse  biochemical treatment  biological diversity

中文摘要:

      相较于传统烟草制备工艺，造纸法烟草薄片生产过程用水量大、水循环利用率低。为降低水耗、提高水资源利用率，利用烟草薄片废水处理站二沉池出水（简称外排水）代替自来水冲洗压滤机滤布，研究了外排水回用对生化池出水水质指标及活性污泥生物多样性的影响，以探究外排水回用的技术可行性。结果表明，利用外排水冲洗滤布技术可行且可节约水资源；当外排水回用量低于二沉池出水总量的10%时，外排水回用对生化池出水水质基本无影响；高通量测序结果表明，外排水回用前后生化池活性污泥中的微生物物种丰度均较高，外排水回用对生化池中活性污泥菌群结构的影响较小。

Abstract:

      Compared to conventional tobacco preparation technology， papermaking process for producing reconstituted tobacco sheet has problems of large water consumption and low water recycling efficiency. To reduce water consumption and improve utilization efficiency of water resource， the effluent from the secondary sedimentation basins （i.e.， drainage water） of papermaking reconstituted tobacco process was used to wash filter cloth. The effect of drainage water reuse on the effluent quality and biodiversity of activated sludge in biological reactor， and its technical feasibility were explored. The results showed that it was feasible to wash the filter cloth with drainage water so as to conserve water. Further， drainage water reuse has negligible influence on the effluent quality when the reuse amount is less than 10% of the total effluent amount from biological reactor. The high-throughput sequencing results showed that the microbial species richness of activated sludge in biological reactor was high before and after drainage water reuse， indicating a slight effect on microbial community in activated sludge by reusing drainage water.