by Heather Jennings, PE
. . . the lagoon sludge layer, that is. I’ve seen many lagoons full of sludge, and the general attitude I find in the water industry is that the sludge layer is inert and really can only be mechanically dredged. To a certain point, that is correct: sand, soil, grit, plastics—basically inorganics—do need to be mechanically dredged. The organics, on the other hand, don’t, and they are easily removed with bioremediation.
I recently completed a year-long study on a municipal lagoon that accepted some waste from food processors. We sludge judged the lagoon as well as looked at the bioactivity throughout the water column by quarterly measurement of the ATP for a year. The highest level of bioactivity was in the sludge layer!
Over the year, we saw that toxic/septic impacts also inhibited the bioactivity of this layer, although delayed compared with the rest of the water column. What was exciting was seeing how the bioactivity increased as the sludge was stimulated with our Bio Energizer® product. Toward the end of the year of Bio Energizer® application, the bioactivity dropped but it correlated with the reduction of the organics in the sludge layer. Which makes sense: less biomass, less bioactivity.
Overall, it was very exciting to see how bioactive the sludge layer was and that, when it is stimulated, it can bioremediate the organics itself with just a little biostimulant push.
Complete the form below to download/read the complete white paper,
“Lagoons: Under the Surface.
(32 pages, 34 figures, 37 tables)
Related Posts
This Week in Ag #24
Yellow airplanes were buzzing over Iowa cornfields like bumblebees over zinnias during my drive to Iowa last week. There was a time when Midwest farmers would grind their teeth at the sight of these crop dusters. It usually meant a neighbor was treating a pest problem with a costly, unplanned aerial application. And that pest problem
Earth Week: Celebrating All Creatures Small and Great
No matter how small the acts, or how small the actors, everything in our natural world connects, and everything makes a difference. I spend a lot of time reading to my granddaughters, and I’ve found that there are now many kid books about how to help the Earth (I’ve selected a few at the end
This Week in Ag #40
I’ll never forget the sage words an old farmer told me when I announced my intention to start farming in the late 1990s. I explained that I was not leaving my marketing job and that I was also doing a fair amount of freelance consulting work. He told me, “It’s funny how many other jobs you need
