Plan a trial for your application
Wastewater denitrification
Use actual wastewater and sludge to compare nitrogen removal and residual organics in the effluent.
Liquid carbon-source metering
Use the pumped liquid’s density, flow and COA to calculate active material delivered per unit volume.
Purchase specifications and incoming inspection
Review these properties when selecting and inspecting incoming material. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. U.S. EPA · Evaluation of external carbon sources for denitrification ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Sodium acetate assay | % by mass | Confirm against the offered grade and purchase specification | Identify the hydrate or anhydrous reporting basis. |
| COD equivalent | kg COD/kg product | Confirm against the offered grade and purchase specification | Distinguish a theoretical conversion from a value measured using the specified method. |
| Density | g/mL | Confirm against the offered grade and purchase specification | For liquids only. State the temperature. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Specify moisture-resistant packaging for crystals. For solutions confirm unit net weight, tank and discharge connection.
Storage and handling
If crystallisation follows a change in transit temperature or concentration, use the grade-specific retest procedure.
Sample and order lead times
State treatment scale, trial quantity and acceptable packaging. Request minimum quantities, preparation times and arrival dates for lab samples, pilot lots and routine replenishment.
Questions from the plant
Why do two carbon sources labelled “25%” give different denitrification costs?
Confirm concentration basis and COD equivalent, then compare unit nitrogen-removal cost in the same wastewater.
Does cloudiness in a liquid product establish expiry?
Check transit, temperature and the original retain. Test against the specification before deciding.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Sodium acetate assay, COD equivalent, Density.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.