Field evidence, weighed by provenance

Sort by who produced the number

There is no shortage of field figures in this category. What there is a shortage of is independent ones. The single most useful thing a reader can do with a lagoon bioaugmentation result is ask how it was produced before asking how large it is, because the answer sorts the evidence into two very different tiers. In a peer-reviewed study the measurement was made and reviewed independently of any sale. In a field result — which is what almost everything published in this category is, ours included — a plant was treated, something was measured before and after, and the outcome was written up by a party with an interest in it. Both have a place, and the place is not the same. What separates a useful field result from a decorative one is whether anything was left untreated to compare against, who ran the laboratory work, and whether the method was stated at all.

The peer-reviewed full-scale record

Independent, full-scale, peer-reviewed studies of lagoon bioaugmentation are surprisingly few, and the most striking is also the oldest. In an eight-month study at a single municipal aerated lagoon, a multi-strain bacterial product dosed to the influent was associated with an accumulated sludge blanket falling from around seven or eight feet to two or three, with several million pounds of accumulated solids bio-converted and no reported deterioration in final effluent quality. It is a genuine full-scale result in the peer-reviewed literature — with the caveat that some of its authors appear to have been affiliated with the product, so it is not wholly disinterested, and it is nearly forty years old.

The more recent peer-reviewed work tends to measure effluent quality rather than the sludge blanket directly. A 2020 study of full-scale biogranule-augmented municipal lagoons reported a large improvement in the organic strength of the treated effluent — a reduction in five-day biochemical oxygen demand of around 86 per cent after augmentation — which is evidence that augmentation changed how the lagoons processed load, even though blanket depth was not the endpoint. Taken together, the independent record supports the mechanism at full scale while leaving the central practical question — how reliably a surface-applied product reaches and reduces a specific benthic blanket — less settled than any vendor page suggests.

The vendor case studies

Most published field numbers are vendor case studies, and they should be read as marketing that happens to contain data rather than as evidence. Two are worth citing as representative. One manufacturer reports a single municipal lagoon in which sludge depth fell by about seven inches over a year of dosing. A conference case study from another company reports about a 25 per cent reduction in volatile solids over 180 days in a fourteen-acre lagoon, and is unusually careful in that the sampling was carried out by a third-party laboratory the city hired rather than by the vendor — which makes its measurements stronger than most, even though the framing and conclusions remain the seller's. Neither is peer-reviewed, and both are labelled here for what they are.

Our own field record

The results measured at plants treating with our formulations are collected on their own page, each labelled a field result rather than a controlled trial and each carrying a mark for what was never recorded beside it. The whole distribution appears, outliers marked as outliers: trimming the tail of a dataset to protect a headline is the behaviour this page exists to warn about.

Stated plainly, so that the limit is not something you have to discover later: a field result is not an independent one. Ours are labelled that way for the same reason we would want anyone else's labelled that way. The honest evidence position for this category is the mechanism established in the controlled literature, a thin and partly dated independent field record, and a substantial body of field results — useful, labelled, and not a substitute for your own before-and-after data. What strengthens our own position over time is comparative and sludge-type testing run in house, and reference installations measured by the same method before and after.