Assessment of Wastewater Treatment Plant Upgrading with MBR Implementation

Area of Science:

• Environmental Engineering
• Water Treatment Technologies

Background:

• Wastewater treatment plants require modernization due to wear and changing influent conditions.
• Accurate flow and pollutant data are crucial for effective treatment design and operation.

Purpose of the Study:

• To evaluate the modernization of secondary wastewater treatment facilities under reduced flow and increased pollutant concentration.
• To compare the impact of pollutant concentration versus flow rate on treatment tank volumes.
• To assess the benefits and drawbacks of membrane sludge separation in wastewater treatment upgrades.

Main Methods:

• Manual calculations and CapdetWorks software were used for treatment facility design.
• The study focused on upgrading from organic pollutant removal to nutrient and organic pollutant removal.
• Calculations compared tank volumes and energy costs for gravity separation versus membrane separation.

Main Results:

• Pollutant concentration significantly influences required tank volumes more than flow rate changes, especially for enhanced treatment.
• Membrane sludge separation can reduce tank volumes by 1.5-2.5 times compared to gravity separation.
• While membrane separation lowers capital costs, it increases specific aeration energy consumption.

Conclusions:

• Wastewater treatment plant modernization must account for increased pollutant loads.
• Membrane technology offers substantial volume reduction benefits but necessitates higher energy input for aeration.
• The choice between gravity and membrane separation involves balancing capital cost savings against operational energy expenses.