Bio-CNG Production Yield & Output - Quantity Breakdown (Based on 10 TPD Input)
Daily digestate output split into solid Fermented Organic Manure (FOM) and liquid FOM for four feedstock types in a 10 TPD Bio-CNG plant — the numbers a developer needs to plan digestate storage and off-take.
| Feedstock Type | Total Digestate (Daily) | Solid FOM (Approx.) | Liquid FOM (Approx.) |
| Agri Waste | 88.8 Tons | 12 - 15 Tons | 73 - 76 Tons |
| Pressmud | 23.6 Tons | 4 - 6 Tons | 17 - 19 Tons |
| Municipal Waste | 19.1 Tons | 2 - 3 Tons | 16 - 17 Tons |
| Animal Waste | 17.8 Tons | 1.5 - 2 Tons | 15 - 16 Tons |
Beyond definitions
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How to read this table
- All values are daily output from a 10 TPD feedstock input plant — 10 tonnes of feedstock processed per day, before water addition.
- Total Digestate includes all water added during pre-processing — this is why agri waste shows 88.8 tonnes from only 10 tonnes of raw input.
- Solid FOM is the press-cake fraction after screw press separation — compostable and baggable.
- Liquid FOM (LFOM) is the liquid fraction — suitable for drip or sprinkler irrigation after filtration.
About this table
Every Compressed Biogas (CBG) plant produces two outputs: gas and digestate. This table focuses on the digestate side — the residue that remains after anaerobic digestion is complete. For a plant processing 10 tonnes per day (TPD) of feedstock, the volume and split of digestate varies significantly depending on what you feed the digester.
Agri waste produces the most total digestate by far — 88.8 tonnes per day — because it requires a large water-to-feedstock ratio (roughly 8:1) to achieve the slurry consistency needed for wet anaerobic digestion. Of that 88.8 tonnes, about 12–15 tonnes is solid FOM (the stackable, compostable fraction) and 73–76 tonnes is liquid FOM used for fertigation. Animal waste, by contrast, produces only 17.8 tonnes of digestate daily because cattle dung already contains sufficient moisture and does not need heavy water addition.
Pressmud (sugar industry press cake) and municipal solid waste (MSW) fall in the middle range at 23.6 and 19.1 tonnes of digestate per day respectively. The solid FOM fraction from pressmud (4–6 tonnes per day) is notably higher relative to its total digestate, reflecting the fibrous nature of sugar filter cake that retains more dry matter after separation.
These numbers directly determine how much land, tank capacity, and bagging or fertigation infrastructure a plant developer must plan for. Agri-waste plants need significantly larger digestate storage areas and liquid pumping systems than animal-waste plants of the same gas output capacity.
Key insights
- Agri waste generates 88.8 tonnes of digestate per day from 10 tonnes of feedstock — the highest volume of any feedstock type — because it requires an 8:1 water-to-feedstock ratio in pre-processing.
- Animal waste produces the lowest digestate volume (17.8 tonnes per day) while still being a reliable gas source, making it easier to manage from a digestate handling standpoint.
- The solid FOM fraction from pressmud (4–6 tonnes per day) is proportionally high relative to total digestate, reflecting the fibrous press-cake structure that retains dry matter.
- Digestate volumes determine storage tank size, bagging capacity, and transport logistics — these numbers are a core input for plant area and infrastructure planning.
Methodology & sources
Values are based on typical mass balance outcomes for a 10 TPD wet anaerobic digestion plant operating at mesophilic temperature (35–40°C). Digestate splits reflect industry-standard screw press separation performance. Actual volumes vary with feedstock moisture content, water addition ratio, and separator efficiency. Use for planning estimates; verify with your technology supplier for project-specific mass balances.
Related data tables
Bio-CNG Production Yield & Output - Expected Bio-CNG yield
Expected Bio-CNG output in kg/day from a 10 TPD plant for five feedstock types — pressmud gives the highest yield at 1,000 kg/day, while cattle dung gives the lowest at 175 kg/day — with vehicle fuelling equivalents for each.
CBG/ Bio-CNG conversion efficiency & Mass Balance
A complete mass balance for a 10 TPD CBG plant showing how much water is added, how much biogas is produced, and how much digestate exits the digester for five feedstock types — from agri waste to animal waste.
Feedstock Categories for Bio-CNG Production
Five feedstock types for Bio-CNG production mapped against sources, Indian regional availability, seasonal patterns, and gas yield — a practical reference for site-specific feedstock planning.