基于电厂粉煤灰的微藻采收新方法及其性能  

New method and performance of microalgae harvesting based on power plant fly ash

作　　者：章浩文 尹鸿伟 秦微 丁可可 文豪 范廷玉[1,2] ZHANG Haowen;YIN Hongwei;QIN Wei;DING Keke;WEN Hao;FAN Tingyu(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001;Institute of Environment-friendly Materials and Occupational Health,Anhui University of Science and Technology,Wuhu,Wuhu Anhui 241003)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]安徽理工大学环境友好材料与职业健康研究院(芜湖),安徽芜湖241003

出　　处：《环境污染与防治》2022年第8期1035-1041,共7页Environmental Pollution & Control

基　　金：安徽省自然科学基金青年项目(No.2008085QC107);安徽省教育厅基金重点项目(No.KJ2020A0314);安徽理工大学校级重点项目(No.13200041);安徽理工大学环境友好材料与职业健康研究院研发专项基金资助项目(No.ALW2020YF08);安徽理工大学2021年大学生创新创业训练计划项目(No.202110361006)。

摘　　要：以粉煤灰空心微珠(FACs)作为浮珠材料,以小球藻为例,提出新型浮珠浮选法。在有效浮选采收微藻的同时还给FACs的回收利用提供了新思路。同时,结合响应面法(RSM),筛选出浮选时间、pH和聚合氯化铝(PAC)浓度是影响浮珠浮选工艺的关键因素,其中pH对采收率的影响最为显著,在较低pH下,FACs和小球藻之间的静电斥力逐渐减为负值,从而出现了静电吸引,这有利于浮珠与微藻之间的吸附,在pH为4.194、PAC质量浓度为80 mg/L、浮选时间为12 min的条件下采收率最高可达88.4%。通过经济成分分析发现,在采收率为88.4%时该方法实际处理成本仅为0.73元/t,具有很大的工业化应用前景。Fly ash cenospheres(FACs) were used as buoy-bead material, with Chlorella vulgaris as algae species, a novel buoy-bead flotation was proposed. It also provided a new idea for the recycling of FACs while effectively harvesting microalgae by flotation. At the same time, the response surface methodology(RSM) was employed to find the key factors affecting the FACs flotation process. Flotation time, pH and polyaluminium chloride(PAC) concentration were the most three key factors. The results showed that pH had the most significant effect on harvesting efficiency. When pH was low, the electrostatic repulsion between FACs and Chlorella vulgaris gradually decreased to a negative value, resulting in electrostatic attraction. The electrostatic attraction was conducive to the adsorption between buoy-beads and microalgae. The harvesting efficiency achieved the highest(88.4%) with the pH of 4.194,PAC concentration of 80 mg/L and flotation time of 12 min. According to economic component analysis, the novel buoy-bead flotation method proposed in this study showed that the actual treatment cost of this method was only 0.73 yuan/t while the harvesting efficiency was as high as 88.4%. Therefore, the novel buoy-bead flotation method had great prospects for industrial application.

关 键 词：粉煤灰空心微珠 小球藻 浮珠浮选 采收率 聚合氯化铝 响应面法 

分 类 号：X773[环境科学与工程—环境工程]