水华蓝藻厌氧发酵工艺技术研究

以太湖水华蓝藻为底物,用改进的CSTR(continuous stirred tank reactor)工艺,研究了不同有机负荷条件下蓝藻厌氧发酵相关参数与蓝藻藻毒素的去除效果.结果表明:在(35±1) ℃条件下,逐步提高有机负荷,系统运行稳定,有机负荷最高可达3.53 kg·m-3·d-1,此时最大容积产气率达0.89 m3·m-3·d-1,COD去除率在70%左右,甲烷体积分数达60%以上.不同负荷条件下,出料中藻毒素(MC-RR、MC-LR)检测均为阴性,已达无害化处理要求,表明该工艺可以有效处置水华蓝藻,实现能量回收与无害化处理的目标.

Technology for Anaerobic Fermentation of Blue-Green Algae

Efficiency of the use of the modified continuous stirred tank reactor(CSTR) technology in anaerobic fermentation of blue-green algae collected from the Taihu Lake was studied under the different rates of organic loading.Results show that operation of the system at (35±1) ℃ remained stable with organic loading rate gradually increasing.After 65 days of operation,its organic loading could reach as high as 3.53 kg·m3·d-1,its gas producing rate well as high as 0.89 m3·m-3·d-1,its COD removal rate around 70%,and methane concentration of the biogas it produced over 60%.Test of the discharge from the system showed negative of microcystins (MC-RR or MC-LR) in all loading conditions.The findings suggest that the modified CSTR technology satisfies the requirement for efficient treatment of blue-green algae,while realizing the target of energy recovery and dehazardization of the blue-green algae.