Build the COD Balance
Track influent, effluent, removed COD, and the allocation to biomass synthesis.
Engineering Excel Workbook
Methane Production in Anaerobic Digester
Estimate daily methane and total biogas production from biodegradable soluble COD removal. Trace the COD mass balance, biomass synthesis, and digester-temperature correction in one Excel workbook.
Excel WorkbookEvaluation ToolsReview-Ready Output
What This Module Helps You Evaluate
Estimate Gas Production
Calculate preliminary methane and total biogas outputs from the adopted operating basis.
Review Assumptions
Keep digester temperature, methane fraction, and calculation assumptions visible.
Calculation Coverage
Operating basis, evaluation, and documented outputs.
Operating Basis
- Biosolids flow and soluble COD
- COD removal fraction
- Biomass yield
- Digester temperature and methane fraction
COD Mass Balance
- Influent and effluent COD loads
- Removed COD
- Biomass COD equivalent
- COD available for methane
Gas Production
- Methane generation estimate
- Temperature correction
- Daily methane output
- Total biogas estimate
Workbook Experience
See the Complete Evaluation Workflow
Review the actual workbook structure, calculation sequence, and outputs before downloading.
Actual workbook PDF, page 1: operating inputs and COD allocation through the methane-generation calculation.
Calculation Checks
Review the calculation outputs against their stated operating basis.
| Evaluation Item | Workbook Evaluation |
|---|---|
| COD loading | Influent and effluent daily loads calculated |
| COD removal | Removed COD linked to the selected removal fraction |
| Biomass allocation | Biomass-synthesis COD deducted from methane availability |
| Temperature correction | Digester operating-temperature basis applied |
| Gas summary | Methane and total biogas production shown separately |
Review the stated assumptions and operating basis when interpreting these results.
What's Included
Excel Workbook
Editable calculation source
Design Inputs
Flow, COD, and operating basis
COD Balance
Removal and biomass allocation
Methane Estimate
Temperature-corrected output
Biogas Summary
Daily gas-production results
References
Calculation basis
AIDIA supports preliminary engineering calculation and review. Confirm input data, digester assumptions, and process applicability before using results for design or operating decisions.
Estimate Your Digester Gas Production
Connect COD removal, biomass synthesis, and operating assumptions in one traceable calculation workbook.