See your CBG plant before you build it
Most of the ways a compressed biogas plant fails — feedstock that never arrives, a digester loaded past what the biology will take, digestate treated as waste — are visible in arithmetic long before anyone pours concrete. cbg-sim is that arithmetic, made something you can push on. It is free, India-first, and building does not need an account.
Visualize the plant
Wire your plant on a canvas — feedstock into a digester, gas through an upgrader, the product to a buyer — and watch the whole thing respond: daily CBG at IS 16087 spec, digestate and the other co-products, capital cost, revenue, margin, payback, and well-to-tank carbon intensity. Change the mix and every number moves with you.
De-risk the venture
The model refuses to flatter your plan. A plant that cannot actually be fed says so rather than quietly averaging the year, and every one of the 197 figures behind it carries its provenance — cited, derived, projected, or still waiting on a citation — because this sector’s public numbers move and you deserve to know which ones. It is steady-state, not a DPR, and it is not pretending to be: the full list of what it deliberately leaves out, and every equation, are in the methodology.
Learn what makes a CBG venture succeed
The same knowledge that powers the model is yours to read. Learn walks the sector stage by stage — 258 sourced answers, with 7 honestly flagged as thin evidence rather than repeated confidently — and its component catalogue explains all 22 machines you would be buying: what each one does, what it draws, and what it does to your capex. Found something wrong? Every entry has a report control, and corrections flow back into the model itself.
Who runs it
cbg-sim is built by ClimateWise — climatewise.today — for developers sizing a first plant, lenders testing somebody else’s numbers, FPOs and mill operators weighing their residue, and students who want the sector to make sense. It is v0.1 beta: calibrated and documented, but read the provenance flags before quoting anything in a document somebody will act on. If you build or supply equipment for Indian CBG plants and want to be listed in the catalogue — sourcing always renders below the modelled figures, never inside them — write to us. Corrections, data, and engagements: hello@climatewise.today.