Solids Load Calculator

Track solids entering beds, tanks, and filters fast. Choose units, apply efficiency, and validate inputs. Download clean CSV and a simple PDF summary now.

Inputs

Pick the input style that matches your data.
Optional. Use 0 if no capture occurs.
Typical lab or field estimate for suspended solids.
Use with concentration × volume mode.
Used to compute volume as Q × time.
Total runtime for irrigation or discharge.
Percent dry solids in the slurry mixture.
Estimate the batch or tank volume.
Use 1.000 if unknown.
Reset

Example Data Table

Scenario Method Inputs Gross solids
Runoff sample Concentration × Volume C=250 mg/L, V=800 L 0.200 kg
Irrigation line Concentration × Flow × Time C=180 mg/L, Q=12 L/min, t=45 min 0.0972 kg
Compost slurry Slurry Total Solids TS=6%, V=120 L, ρ=1.00 kg/L 7.200 kg
Tip: add a capture efficiency to split retained and discharged loads.

Formula Used

Water-based load

Gross solids mass is computed using concentration and total processed volume.

  • Volume (L) = Flow (L/min) × Time (min) (when flow mode is used)
  • Mass (mg) = Concentration (mg/L) × Volume (L)
  • Mass (kg) = Mass (mg) ÷ 1,000,000

Slurry total solids

Dry solids are estimated from slurry volume, density, and total solids percentage.

  • Wet mass (kg) = Volume (L) × Density (kg/L)
  • Dry solids (kg) = Wet mass × (TS% ÷ 100)

If you enter a capture efficiency, retained solids equal gross mass multiplied by that percentage. Discharged solids equal gross mass minus retained mass.

How to Use This Calculator

  1. Select a calculation method that matches your measurements.
  2. Enter concentration with volume, or provide flow and duration.
  3. For slurries, enter TS%, volume, and an estimated density.
  4. Optionally set capture efficiency for filters or settling.
  5. Press Calculate to view results above the form.
  6. Use the CSV or PDF buttons to export the latest result.

Professional Notes

Why solids load matters in gardens

Suspended solids carried by irrigation, runoff, or compost teas can clog emitters, reduce infiltration, and bury seedling crowns. Tracking mass rather than “cloudiness” helps you size filters, plan settling time, and compare events consistently across seasons and beds.

Using concentration with measured volume

When you have a lab or field concentration in mg/L, multiply by total liters to get mass in mg, then convert to kilograms. Example data: C=250 mg/L and V=800 L gives 200,000 mg, which equals 0.200 kg gross solids. This method is ideal for tank drains or captured runoff.

Flow-based estimation for irrigation runs

Many growers know line flow and runtime better than total liters. Compute volume as Q×t, then apply the same concentration equation. Example data: C=180 mg/L, Q=12 L/min, t=45 min gives V=540 L and gross solids 97,200 mg (0.0972 kg). Record Q and t each cycle to build weekly totals.

Slurry total solids for compost and bio-inputs

For thicker mixtures, use slurry density and TS%. Wet mass equals volume times density, then dry solids equal wet mass times TS/100. Example data: TS=6%, V=120 L, density 1.00 kg/L yields wet mass 120 kg and dry solids 7.2 kg. This highlights why small TS changes can dominate load.

Interpreting capture efficiency outputs

Capture efficiency splits gross mass into retained and discharged loads, supporting filter maintenance plans. Example data: if gross is 0.200 kg and efficiency is 70%, retained solids are 0.140 kg and discharged solids are 0.060 kg. Use measured pressure drop or jar tests to refine efficiency over time.

FAQs

1) What concentration value should I use?

Use a measured TSS value when available. If you only have turbidity, start with a conservative estimate and refine after a few samples from the same source and season.

2) Which method is most accurate?

Accuracy depends on your inputs. Concentration with a measured volume is usually best. Flow-based runs are strong when flow and runtime are stable and recorded consistently.

3) Why does the tool show retained and discharged solids?

It helps you quantify what a filter, screen, or settling basin removes versus what continues downstream. This supports cleaning schedules and helps compare different capture setups.

4) How do I choose slurry density?

If unknown, use 1.00 kg/L as a practical default. For thick slurries, density can be higher; weigh a known volume (for example 1 liter) to improve your estimate.

5) Can I total solids load across multiple events?

Yes. Export each run to CSV, then sum gross or discharged kilograms in a spreadsheet. Keeping consistent units and methods makes season-to-season comparisons meaningful.

6) What does mg/L mean in simple terms?

It is milligrams of solids per liter of water. Multiply mg/L by liters to get milligrams of solids, then convert to grams or kilograms for planning and reporting.

7) How should I use the results for maintenance?

Track retained solids for filter loading and discharged solids for sedimentation risk. Rising loads may indicate source disturbance, clogged intakes, or a need to improve settling.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.