Bước đầu ứng dụng phương pháp đông tụ sinh học làm tăng hiệu suất lắng trong xử lí nước thải chế biến thủy sản

ABSTRACT This article focuses on the experimental research on Bio-Flocculation-Absorption Sedimentation process which helps increase sedimentation in mechanical treatment (secondary treatment), and creat suitable conditions for biological treatment. The object of study is the wastewater from the processingof fresh water products. The following factors have some effects on this process: aeration time with air output 0.5m3/hour/m3(20 minutes), MLSS (4g/l), and sedimentation time (one hour and a haft) are favorable conditions. As a result, the removal of suspended solids at the settlement tank obtains 84.64%, suitable for the biological treatment process that follows. Key Words: Bio-Flocculation; Fishy wastewater; Sedimentation process; c agulati n