海藻酸钠包埋高效菌种强化处理聚酯废水的试验研究

Study on bio-augmentation process of polyester wastewater treatment using dominant bacterials immobilized in calcium alginate gel bead

对海藻酸钠-氯化钙法包埋某高效微生物菌种用于强化聚酯废水的生物处理进行了试验研究,同时将其与普通系统和高效菌种的悬浮投加型强化系统作了相应比较。结果表明:相对普通系统,悬浮投加高效菌种可使出水COD降低100mg/L,处理率提高8%,而用海藻酸钠-氯化钙法包埋固定化之后投加则可使出水COD降低200mg/L,处理率提高14%,使最终出水COD达到100mg/L以下,达到出水的排放要求,且减少了废水中对人类和环境有较大危害的1,4-二氧杂环己烷的含量。

Commercially available dominant bacterials immobilized in calcium alginate gel bead have been used to enhance the biological treatment performance for polyester wastewaters. Compared with the controlled system and the bio-augment system in which dominant bacterial are added in suspended state. The results indicate that the effluent COD of immobilized bio-augmented system is 200 mg/L lower than that of the controlled system, with 14 percent higher in COD removal efficiency. While the system, adding dominant bacterial in suspended state, are 100 mg/L and 8 percent respectively. Immobilization of dominant bacterials not only make the final effluent meet the discharge requirements but also reduce the content of 1,4-dioxane in effluent, which is poisonous to the health of human being and environment.