Solids Production Rate
Partition supplied dry feed into uneaten and fecal solids then apply mechanical capture; dry-mass basis excludes dissolved organics and biological sludge.
Description
Feed-derived dry solids include uneaten feed and fecal material from the consumed portion.
Feed-derived dry solids include uneaten feed and fecal material from the consumed portion. Applying fecal yield only to consumed feed avoids counting the same feed twice.1
Partition supplied dry feed into uneaten and fecal solids then apply mechanical capture; dry-mass basis excludes dissolved organics and biological sludge.
When to use Solids Production Rate
Use this tool to partition supplied dry feed into uneaten and fecal solids then apply mechanical capture; dry-mass basis excludes dissolved organics and biological sludge.
Prepare the cohort, water, feed or equipment measurements for one consistent operating period. Confirm nitrogen reporting bases, dry/wet masses, flow units and supplied design assumptions.
How to use Solids Production Rate and understand its results
- Prepare the cohort, water, feed or equipment measurements for one consistent operating period. Confirm nitrogen reporting bases, dry/wet masses, flow units and supplied design assumptions.
- Enter feedKgPerDay, uneatenFeedFraction, consumedFeedDryFecalFraction, captureFraction using the field table and calculation rules, then run the tool.
- Read uneatenSolidsKgPerDay, fecalSolidsKgPerDay, totalSolidsKgPerDay, capturedSolidsKgPerDay. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| feedKgPerDay | Feed kg per day | number | Required |
| uneatenFeedFraction | Uneaten feed fraction | number | Required |
| consumedFeedDryFecalFraction | Consumed feed dry fecal fraction | number | Required |
| captureFraction | Capture fraction | number | Required |
Enter nonnegative feed kg/day and fractions from zero through one. The tool separates uneaten and fecal solids, sums production and applies the supplied capture fraction. All mass rates are dry kg/day on the same basis.
uneaten=feed×uneatenFraction; fecal=feed×(1−uneatenFraction)×fecalYield; captured=(uneaten+fecal)×captureFraction Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| uneatenSolidsKgPerDay | Uneaten solids kg per day | number |
| fecalSolidsKgPerDay | Fecal solids kg per day | number |
| totalSolidsKgPerDay | Total solids kg per day | number |
| capturedSolidsKgPerDay | Captured solids kg per day | number |
{
"input": {
"feedKgPerDay": 100,
"uneatenFeedFraction": 0.1,
"consumedFeedDryFecalFraction": 0.2,
"captureFraction": 0.8
},
"output": {
"uneatenSolidsKgPerDay": 10,
"fecalSolidsKgPerDay": 18,
"totalSolidsKgPerDay": 28,
"capturedSolidsKgPerDay": 22.400000000000002
}
}Limitations and assumptions
Dissolved waste, water in sludge and later mineralization are excluded. Supplied fractions determine the estimate rather than a species-specific digestibility or filter model.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Drum Filter Sizing: Size effective drum-filter area from calibrated hydraulic/solids fluxes and available duty; backwashing, mesh capture and vendor ratings are supplied externally. For a complementary task, use Clarifier Sizing: Size an ideal circular clarifier against caller hydraulic and solids loadings and report detention; settling performance, inlet hydraulics and short circuiting are external.
References
-
Solids Production Rate — tool.io
Similar or alternative tools
- Drum Filter Sizing
Size effective drum-filter area from calibrated hydraulic/solids fluxes and available duty; backwashing, mesh capture and vendor ratings are supplied externally.
- Clarifier Sizing
Size an ideal circular clarifier against caller hydraulic and solids loadings and report detention; settling performance, inlet hydraulics and short circuiting are external.