The Modified Luczak-Ettinger (MLE) process is an advanced variation of the conventional activated sludge system, primarily designed for the biological removal of nitrogen from wastewater. It is widely implemented in municipal and industrial wastewater treatment plants across India and globally due to its efficiency and operational flexibility.
Industrial Applications
The MLE activated sludge process is widely used in:
- Municipal Sewage Treatment Plants: For removal of organic matter and nutrients (especially nitrogen) in domestic wastewater.
- Industrial Wastewater Treatment: In industries such as food processing, pharmaceuticals, textiles, and chemicals, where nitrogen-rich effluents are common.
- Upgrades of Existing Facilities: Retrofitting conventional activated sludge plants to achieve regulatory compliance for nitrogen discharge limits.
Inlet and Outlet Parameters
Key parameters for design and operation are as follows:
| PARAMETER | INLET(RAW SEWAGE) | OUTLET(TREATED WATER) |
| Biochemical Oxygen Demand (BOD<sub>5</sub>) | 150 – 15000 mg/L | < 10 mg/L |
| Chemical Oxygen Demand (COD) | 300 – 4000 mg/L | < 50 mg/L |
| Total Suspended Solids (TSS) | 120 – 350 mg/L | < 10 mg/L |
| Total Nitrogen (TN) | 30 – 60 mg/L | < 10 mg/L |
| Ammonia (NH<sub>4</sub>-N) | 20 – 40 mg/L | < 1 mg/L |
| Total Phosphorus (TP) | 3 – 10 mg/L | < 2 mg/L |
