低强度超声波强化改性海泡石去除微囊藻的试验研究  

Experimental Study on Low Intensity Ultrasound to Enhance the Microcystis Removal by Modified Sepiolite

作　　者：骆灵喜 林秋月[3] 王波[1,2] 

机构地区：[1]深港产学研基地,广东深圳518000 [2]北京大学深圳研究院,广东深圳518000 [3]深圳市深港产学研环保工程技术股份有限公司,广东深圳518000

出　　处：《安全与环境工程》2017年第3期62-65,70,共5页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(513080061006239);深圳市战略新兴产业发展专项资金项目(JCYJ20150515154623966);深圳市节能环保产业发展专项资金项目(s2014000700012)

摘　　要：采用天然无毒的壳聚糖改性海泡石作为絮凝剂去除微囊藻,考察不同投加量的壳聚糖改性海泡石的絮凝除藻效果,并通过低强度超声波(功率为40W、作用时间为10s)强化絮凝除藻试验,研究低强度超声波对微囊藻沉降性能以及微囊藻生长和藻细胞形态结构的影响。结果表明:采用壳聚糖改性海泡石去除微囊藻的最佳投加量为20mg/L;低强度超声波处理10s时对改性海泡石去除微囊藻的强化效果最佳,微囊藻液浊度和藻细胞的去除率分别提高了34.95%和32.58%;低强度超声波对微囊藻的生长和细胞形态结构无显著影响,但可显著提高微囊藻细胞的沉降性能,从而有利于藻细胞进行絮凝沉淀去除。本研究可降低除藻药剂投加量,有助于开发一套更环保、经济和高效的除藻方法。This paper uses the natural nontoxic modified sepiolite as the flocculant to remove Microcystis and investigates the algae removal performance of chitosan-modified sepiolite with different dosage.Conduting low intensity ultrasonic experiments（whose power is 60 W and action time is 10seconds）to enhance the algae removal,the paper explores the impact of low intensity ultrasound on the sedimentation effect and growth of Microcystis and the morphological structure of the algal cells.The results show that the Microcystis removal is enhanced most by modified sepiolite with the dosage of the modified sepiolite 20mg/L and the low intensity ultrasound treatment for 10 s,by which the removal rate of turbidity and algal concentration increased by 34.95% and 32.58% respectively.Low intensity ultrasound shows no significant influence on the growth and morphological structure of Microcystis,but it can significantly improve the sedimentation and aggregation of the algae,thus contributing to the removal of algal cells by flocculation and sedimentation.The paper helps to develope a more environmentally friendly,economical and efficient method to remove algae by reducing the dosage of algae removalagent.

关 键 词：低强度超声波 壳聚糖 改性海泡石 微囊藻 除藻效果 

分 类 号：X524[环境科学与工程—环境工程]