How to tell one sludge bacteria offer from another

The products are more alike than the websites suggest

Many biological treatment brands use contract manufacturing. The label alone does not tell you whether the blend is standard or made to a customer's specification. Ask how the formulation is selected, checked and matched to the intended application.

Before changing supplier after a disappointing result, review the diagnosis, dose, delivery method and lagoon conditions. A different product will still face the same constraints if the sludge is largely inert or the lagoon is poorly mixed.

Four points to compare

When the organisms are a near-commodity, the evaluation has to move to what the seller adds. Four axes cover almost all of it.

• Dose discipline. A commercial dose should come from the manufacturer's written dose table for the specific blend, applied to the dimensions and condition of your lagoon, with a document revision the seller can name. A pounds-per-acre rule of thumb, a quantity copied from a competitor's calculator, or a case-study amount worked backwards is how under-dosed orders happen — and an under-dosed order reads to the operator as a product that does not work.
• Documentation. Ask for a Safety Data Sheet, a technical data sheet and a lot-specific certificate of analysis. Check whether the viable count was measured at manufacture or guaranteed through the stated shelf life, and under which storage conditions.
• Source of results. Check who measured the outcome and who published it. Vendor case studies can provide useful observations, but should be identified as such and read alongside their limitations.
• Stated limits. Bioaugmentation digests the volatile organic fraction of sludge only. Grit, sand, silt, mineral precipitates and plastics remain at any dose, and published reductions run from roughly a third in controlled enzyme studies to around sixty per cent in vendor case studies — reduction, never elimination. A seller who states that unprompted, and who will decline a lagoon that is mostly inert, poorly mixed or on a fixed deadline, is a seller whose yes means something.

How to read product claims

Look for a baseline, measurement method and treatment period in each case study. Reported precision should suit the measurement method. When comparing formats, check whether each delivers the right organisms to the material you need to treat.

Where SediLogic sits on those axes

Our blends are made to SediLogic's specifications. We compare products in house and test across sludge types. Where a written dose method is available, the planner applies it to your lagoon details and records the revision. You can also choose pack quantities yourself; every order is checked before dispatch. Our case-study library labels field results and records their limitations.

Running the evaluation yourself

Ask five questions: Which written method sets the dose? Can I see the SDS, technical data sheet and lot certificate? Is a viable count guaranteed through shelf life? Who measured the reported results? Under what conditions is treatment unsuitable? The companion supplier guide explains each question.