🌱 Modified Ludzack-Ettinger MLE (Nitrate Recycle 300-400%, Anoxic HRT 2-4 Hours)

Biological Nutrient Removal (BNR) Calculator

Size anoxic and aerobic Biological Nutrient Removal (BNR / MLE / Bardenpho) reactor volumes for total nitrogen and phosphorus reduction: calculate Internal Mixed Liquor Recycle (IMLR 300% to 400% of forward flow), Anoxic Hydraulic Retention Time (HRT 2 to 4 hours ensuring complete denitrification to <3.0 mg/L total nitrogen), and environmental profits.

1. Project & Operating Inputs

Wastewater Flow Rate (MGD - Million Gal/Day e.g. 2.5 MGD BNR Plant)

Influent Total Kjeldahl Nitrogen TKN (mg / L e.g. 42.0 mg/L Raw TKN)

Customer Bid Price for Supplied & Piped Anoxic Mixers & Recycle Pumps ($)

Submersible Hypoid Mixers, Low-Head High-Flow Axial Recycle Pumps ($)

2. Financial Breakdown & Yield

MLE BIOLOGICAL NUTRIENT REMOVAL

Turnkey BNR Basin Retrofit Profit

Environmental Process Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost