基于生物混凝剂的太湖蓝藻生物质气浮收获与微波干燥中试系统研究  

Study on the pilot-scale system of flotation harvesting and microwave drying of cyanobacteria biomass from Lake Tai based on biological coagulant

作　　者：张海阳 李莉莉 程绍哲 于桐泊 李成 李林[1] 王佩忠 孙连军 黄俊波 张学治 Zhang Haiyang;Li Lili;Cheng Shaozhe;Yu Tongbo;Li Cheng;Li Lin;Wang Peizhong;Sun Lianjun;Huang Junbo;Zhang Xuezhi(Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;University of Chinese Academy of Sciences,Beijing 100049,China;Wuxi Gongyuan Environmental Technology Sock Co.,Ltd.,Wuxi 214194,China)

机构地区：[1]中国科学院水生生物研究所,湖北武汉430072 [2]中国科学院大学,北京100049 [3]无锡工源环境科技股份有限公司,江苏无锡214194

出　　处：《可再生能源》2024年第8期1004-1011,共8页Renewable Energy Resources

基　　金：国家自然科学基金项目(42277076,51909258)。

摘　　要：文章提出一种基于生物混凝剂的蓝藻生物质混凝-气浮收获与微波干燥工艺,开发了处理量为20 m^(3)/h的中试系统。在太湖的连续运行结果表明:该系统对蓝藻生物质的收获效率高达95%,脱水后生物质的含水率可降低到85%以下;经微波连续干燥10 min后,生物质含水率可以降低到10%以内,且微波干燥对生物质中的蛋白质和糖类等主要营养物质的含量没有影响。经济性分析和成本敏感性分析结果表明,蓝藻生物质的收获与干燥总成本为4134.1元/t,其中生物混凝剂成本占50%以上,蓝藻生物质处理成本与生物混凝剂用量和成本以及微波干燥量密切相关。This study proposes a coagulation-dissolved air flotation and microwave drying processes based on biologic coagulant for harvesting cyanobacteria biomass,and a pilot system with a treatment capacity of 20 m^(3)/h was developed.Continuous operation in Lake Tai demonstrated that the system achieved a harvesting efficiency of up to 95%for cyanobacterial biomass,with the moisture content of the biomass reduced to below 85%after dehydration.After 10 min of continuous microwave drying,the moisture content of the biomass was further reduced to below 10%,with no adverse effects on the main nutrients,such as proteins and sugars.Further techno-economic and cost sensitivity analyses revealed that the total cost of harvesting and drying cyanobacterial biomass was 4134.1¥/t dry biomass,with bioflocculant costs accounting for more than 50%of this total.The processing costs were found to be significantly influenced by the dosage and cost of bioflocculants,as well as the hourly microwave drying capacity.

关 键 词：蓝藻 生物质 生物混凝剂 收获 微波干燥 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.2[农业科学—农业机械化工程]