Need for increased treatment capacity in existing treatment line

In the cold winter months, the biological activity of the active sludge is reduced, which means that it is necessary to increase the biomass in the plant's process tanks to maintain the overall biological turnover. 
In addition, challenges with degraded sedimentation characteristics (SVI) of the sludge are often seen at the same time, due to the growth of filamentous bacteria, among others. 

Combined with the fact that there can be prolonged periods of high rainfall, many treatment plants are challenged during these periods to ensure that effluent requirements can be met, particularly for nitrogen, and to avoid sludge flooding.

SUEZ has shown that these challenges can be addressed either by sludge selection or upgrade with biofilm reactors or the combination of both.

Solutions for hydraulic or biological capacity upgrade

inDENSE: 30% higher hydraulic capacity via sludge selection

inDENSETM is a patented solution for selecting sludge with good settling properties using cyclones. 

Cyclones are installed on the excess sludge feed and separate the sludge into two fractions. The good sludge is returned to the plant while the bad fraction is taken out of the plant as excess sludge.

With very limited costs and a few weeks installation time, the total capacity of conventional activated sludge plants can thus be increased by 30%.

inDENSE – Biomass densification system boosting activated sludge process

Credit: SUEZ group

Membrane aerated biofilm reactors (MABR): 30% higher biological capacity

MABR is an innovative biological treatment process that utilizes gas-permeable membranes to facilitate the transfer of oxygen to a biofilm attached to the membranes. This allows for the growth of aerobic microorganisms that break down organic matter in the wastewater, resulting in its treatment. 

By implementing MABR technology, operators aim to enhance the efficiency and effectiveness of wastewater treatment. This modernization can improve the removal of pollutants, especially ammonia, and thereby increase the overall capacity of the plant. It is a significant step forward in utilizing advanced wastewater treatment methods to meet environmental standards and ensure sustainable water management.

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