摘要：

在铁刨花曝气体系（Fe⁰/O₂对照体系）中投加活性炭或H₂O₂构建了Fe⁰/O₂/C体系和Fe⁰/O₂/H₂O₂体系，考察3种体系对腈纶废水中COD、SCN-的去除效果。结果表明，当废水pH为3.0，H₂O₂投加量为3 mL/L，铁刨花投加量为75 g/L，曝气量为60 L/h，反应时间为30 min时，COD、SCN-的去除率分别达到70%、98%以上；Fe⁰/O₂/H₂O₂体系中的COD被优先去除，H₂O₂对SCN-的去除起到了促进作用，降低了其对微生物的抑制作用，可生化性得到显著改善。曝气作用有利于COD的去除，曝气量过大则气泡黏滞、包裹在铁刨花表面，COD去除率反而下降。

关键词: 铁刨花曝气/H₂O₂体系, 铁刨花, 腈纶废水, 可生化性

Abstract:

Based to the iron scrape aeration system, the iron scrape aeration/C and iron scrape aeration/H₂O₂ systems were constructed by adding activated carbon or H₂O₂. The COD and SCN-removal efficiencies of three systems on the acrylic fiber wastewater were investigated. The results showed that when the wastewater was adjusted to pH 3.0, and the reaction conditions were ascertained as H₂O₂ dosage 3 mL/L, iron scrape about 75 g/L, aeration volume 60 L/h, reaction time 30 min, COD and SCN-removal efficiencies were more than 70% and 98%, respectively. COD in iron scrape aeration/H₂O₂ system was preferentially removed. H₂O₂ promoted the removal of SCN- and reduced its inhibition on microorganisms, the biodegradability was significantly improved, the aeration effect was beneficial to the COD removal. When the aeration was too large, the air bubbles were viscous and wrapped on the surface of the iron scraps, and the COD removal efficiency was decrease.

Key words: iron scrape aeration/H₂O₂ system, iron scraps, acrylic fiber wastewater, biodegradability

中图分类号: 

• X703.1