螺旋藻增氧系统处理养殖污水与预测模型研究  

Study on oxygen increasing effect of spirulina in aquaculture sewage and a prediction model

作　　者：杨帆[1] 李国学[1] 张宝莉[1] 邓松林[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100193

出　　处：《环境工程学报》2012年第9期3001-3006,共6页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2008ZX807209-03-3);"十一五"国家科技支撑计划项目(2007BAD89BP7)

摘　　要：针对滨海水产养殖区水质差,溶解氧不足造成对虾死亡的问题,以对虾养殖污水为实验对象,分别进行了螺旋藻在不同盐度梯度(0‰、10‰、15‰、20‰、25‰、30‰和35‰)和BOD5浓度水平(20 mg/L(平均)、40 mg/L(上限)、180mg/L(对照)以及不同投藻量(0、50、100和150 mg/L)情况下的增氧效果实验研究,并进一步构建了预测投加螺旋藻后水体中DO等因素变化的数学模型。实验结果表明,螺旋藻在20‰盐度下生物量增长最快,增氧效果在低污染水质条件下效果较好,最佳投藻量为100 mg/L。经过验证,模型拟合度较高,可以用来预测一定水质条件下螺旋藻增氧效果,对今后采用螺旋藻增氧处理养殖污水具有指导意义。The oxygen increasing effect of spirulina in aquaculture water was evaluated in this study.Experiments were carried out at different salinity levels（0‰,10‰,15‰,20‰,25‰,30‰,35‰）,BOD5 concentrations（20 mg/L as average,40 mg/L as maximum,180 mg/L as CK） and spirulina dosage levels（0 mg/L,50 mg/L,100 mg/L,150 mg/L） separately.Results showed that spirulina grew fastest in 20‰ salinity,perfect effect of increasing oxygen could be achieved under the condition of low BOD5,the optimal dosage was 100 mg/L.Furthermore,a prediction model was constructed to forecast the changes of DO after adding spirulina.The verification test results showed that the model indicated high fitness between simulated and tested data,which could be used to predict the effect of increasing oxygen using spirulina under certain water quality condition,and provided a better way to improve the quality of aquaculture water in seaboard.

关 键 词：养殖污水 螺旋藻 增氧 预测模型 

分 类 号：X524[环境科学与工程—环境工程]