Calculate reactor volume, hydraulic retention time, F/M ratio, oxygen demand, and sludge production for activated sludge, MBBR, SBR, and MBR systems. Based on standard wastewater engineering principles.
Enter your process parameters below to calculate design values. All calculations follow industry-standard methodologies.
BOD loading calculations are fundamental to biological treatment design. The organic loading rate (F/M ratio) should typically range from 0.2-0.5 kg BOD/kg MLSS·day for conventional activated sludge, 0.05-0.15 for extended aeration, and up to 1.0+ kg/m³·day for high-rate MBBR systems. HRT should be adequate to achieve the target effluent quality, typically 4-8 hours for conventional systems and 18-24 hours for extended aeration.
Biological treatment design follows established guidelines including Metcalf & Eddy Wastewater Engineering, Metcalf & Eddy (standard textbook), BS EN 12255 for wastewater treatment plants, and EPA Design Manuals for biological nutrient removal. The equations used align with ASM1/ASM2/ASM3 activated sludge model principles.
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