摘要
电镀废水污染物成分复杂,尤其大量的重金属离子,对生态环境危害极大.本文基于新型生物絮凝剂γ-PGA(γ-聚谷氨酸)处理电镀生化出水、降低其COD以及重金属离子的含量,研究了pH值、温度以及γ-PGA的投加量各因素对γ-PGA处理电镀生化出水的影响,并采用响应曲面法建立了γ-PGA处理电镀生化出水的二次多项数学模型.结果表明:γ-PGA生物絮凝剂对电镀生化出水COD和Cu(Ⅱ)都有较好的去除作用;响应曲面法建立的回归方程对γ-PGA处理电镀生化出水重要的污染物预测效果较好.
Electroplating wastewater had a complex composition,especially heavy metal ions were very harmful to the ecological environment. The content of heavy metal ions in electroplating effluent was processed into the new biological flocculant γ-PGA（ gamma polyglutamic acid） in order to avoid secondary pollution on the environment. The effects of p H value,temperature and γ-PGA dosage on the treatment of biochemical effluent treated with γ-PGA were studied. On this basic,taking the p H,temperature and gamma-PGA dosage as the investigating factors and the COD and the Cu（ Ⅱ） removal rate,response surface method was adopted to establish the gamma-PGA of quadratic multinomial processing electroplating in the biochemical process mathematical model. The model optimization showed that under the condition of wastewater pH of 9. 09,temperature of 30. 13 ℃,1. 05 mg/L of gamma-PGA dosage,COD and Cu（ Ⅱ） removal ratio could reach 47% and 99% respectively.
作者
韦学玉
杨晓凡
刘志刚
张孝忠
WEI Xue-yu1 ,2, YANG Xiao-fan1, LIU Zhi-gang2, ZHANG Xiao-zhong2(1. The School of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu 241000, China; 2. College of Environment, Hehai Lniversity, Nanjing 210098, China)
出处
《吉林师范大学学报（自然科学版）》
2018年第3期85-89,共5页
Journal of Jilin Normal University:Natural Science Edition
基金
国家自然科学基金项目(51502106)
安徽省高等学校自然科学研究重点项目(KJ2017A119)
安徽工程大学青年科研基金项目(2016YQ34)
关键词
电镀生化出水
絮凝
响应曲面法
模型优化
plating biochemical water
flocculation
response surface method
model optimization
