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螺旋藻增氧系统处理养殖污水与预测模型研究

Keywords: 养殖污水,螺旋藻,增氧,预测模型

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Abstract:

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(20mg/L(平均)、40mg/L(上限)、180mg/L(对照)以及不同投藻量(0、50、100和150mg/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100mg/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。

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