摘要
采用破乳-混凝-电絮凝法对兰炭废水进行预处理,研究了不同工艺反应pH、药剂投加量及反应时间对兰炭废水处理效果的影响。结果表明:反应pH为6,破乳剂投加量为5.075 mg/L时可取得较好的破乳效果;以双铝板为电极的电絮凝最佳参数为:电流密度200 A/m~2,极板间距2 cm,pH为4,反应时间为40 min;该参数条件下组合工艺对兰炭废水的COD去除率达到70.64%,氨氮去除率达到41.38%,处理后废水B/C由0.04提升至0.17,可生化性得以提高。
The semi-coke wastewater was pretreated by demulsification-coagulation-electrocoagulation method.The effects of different process reaction pH,dosage and reaction time on the treatment effect of semi-coke wastewater were studied.The results showed that the demulsification effect was better when the reaction pH was 6 and the dosage of demulsifier was 5.075 mg/L.The optimum parameters of electrocoagulation with double aluminum plate as electrode are as follows:current density 200 A/m~2,plate spacing 2 cm,pH 4,reaction time 40 min;under this parameter condition,the COD removal rate of the combined process reached 70.64%,and the ammonia nitrogen removal rate reached 41.38%.After treatment,the B/C of the wastewater increased from 0.04 to 0.17,and the biodegradability was improved.
作者
赵萌
景立明
张安龙
刘欣东
刘爽
马子昂
ZHAO Meng;JING Li-ming;ZHANG An-long;LIU Xin-dong;LIU Shuang;MA Zi-ang(School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi’an 710000,China)
出处
《应用化工》
CAS
CSCD
北大核心
2023年第8期2358-2361,共4页
Applied Chemical Industry
基金
陕西省重点研发计划项目(2020SF-406)。
关键词
兰炭废水
破乳
混凝
电絮凝
coking wastewater
demulsification
coagulation
electroflocculation
