Composting Simulator

Coupled ODE model for aerobic decomposition — substrate kinetics, microbial dynamics, heat balance, oxygen transport, and moisture evolution. Powered by Rust/WASM.

Parameters

Duration 60 days

Initial Substrate (VS) 60%

Initial Moisture 55%

Initial Temp 25°C

Ambient Temp 20°C

Aeration Rate 50 m³/d

Dry Mass 200 kg

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Model

Substrate

dS/dt = -μ·X·S/(Ks+S)·f(T)·f(O₂)·f(M)

Biomass

dX/dt = Y·μ·X·S/(Ks+S)·f - kd·X·f_death

Temperature

dT/dt = (Q_bio - Q_conv - Q_evap) / (m·Cp)

Oxygen

dO₂/dt = (Q_air/V)·(O₂_in - O₂) - OUR

RK4 integration · Rosso cardinal temperature model · Monod kinetics · Haug correction factors · Predict → Simulate → Synthesize → Integrate