Two-Phase Activated Sludge System

Overview

Two-Phase Activated Sludge System can simultaneously increase processing capacity and reduce sludge. The system can be achieved by modifying only a part of the existing aeration tank and does not require installation of a new water tank. Operation management is easy without addition of new utilities. The system uses dispersed bacteria for fast decomposition of organic matter and achieves a significant increase in processing capacity (results of 30% or more). Sludge reduction results in actual machines are 60 to 80%. Dispersed bacteria proliferate rapidly (at least 10 times that of activated sludge), making the system resistant to load fluctuations and less susceptible to bulking. Documentation includes images for dispersed bacteria retaining material (https://power.mhi.com/group/es/sites/g/files/jwhtju1306/files/styles/original_image/public/2024-03/04-1_im01.jpg?itok=GCR5PE2a), the two-phase carrier method (https://power.mhi.com/group/es/sites/g/files/jwhtju1306/files/styles/original_image/public/2024-03/04-1_im02.jpg?itok=FzZymuRR), and system introduction flow comparisons (https://power.mhi.com/group/es/sites/g/files/jwhtju1306/files/styles/original_image/public/2024-04/04-1_im03_0.jpg?itok=aFCWqdiv and https://power.mhi.com/group/es/sites/g/files/jwhtju1306/files/styles/original_image/public/2024-04/04-1_im04_1.jpg?itok=_2pMvh8g). An introduction case example is wastewater from a manufacturing plant for seasoning, etc. In that example, after modification the water treatment quantity increased from 640m3/d to 720m3/d (maximum of 840m3/d) while BOD concentration in raw water remained 1500mg/L and BOD in treated water was 25mg/L or less. Sludge SVI improved from 200 or higher to around 40, and sludge generation rate (organic) decreased from 100％ to 20～40% (Achieve reduction by 60 to 80%).