Aster Bio

08/20/2026

Every biological outcome in wastewater treatment is the result of environmental pressures shaping microbial populations. When you understand the ecology, you can predict performance, diagnose issues accurately, and make defensible process changes.

Microbial ecology is not an academic layer added to wastewater treatment and bioremediation — it is the operating basis of the process. Settling, nitrification, denitrification, biological phosphorus…

08/18/2026

Micronutrients play a quiet but critical role in biological wastewater treatment. From enzyme cofactors to floc formation, this post outlines how small deficiencies can create big performance issues—and how smart verification prevents toxicity and wasted cost.

08/14/2026

At Aster Bio, we harness microbial ecology and biochemistry to help operators achieve stable, efficient, and compliant systems—reducing O&M costs and extending asset life. Our science-driven approach builds resilient microbial communities that keep performance predictable and budgets under control.

08/12/2026

Dense, compact sludge doesn’t just happen — it’s the result of microbial ecology, selection pressure, and the strategic removal of the wrong kind of EPS. Knowing how sludge densification and aerobic granular sludge (AGS) both use the same biological principles to shear away loosely bound EPS (LB EPS) and favor tightly bound EPS (TB EPS) creating strong, compact floc helps when making decisions on this technology.

The Core Idea: Selection Pressure + EPS Remodeling The densification and AGS processes share a simple but powerful ecological principle: If you remove Loosely Bound LB‑EPS and retain only biomass wit…

08/10/2026

Biological treatment performance isn’t just about bugs — it’s about the EPS that holds everything together. Knowing drivers of EPS production helps explain what you are seeing in your system. If you’re troubleshooting pin floc, bulking, compaction issues, or biofilm behavior, take time to understand the ecological drivers of floc & biofilm formation.

In biological wastewater treatment, both flocculation in activated sludge and biofilm formation on fixed or moving media depend on extracellular polymeric substances, or EPS . EPS functions as the...

08/07/2026

Aster Bio’s MCA testing keeps revealing the same story across municipal and industrial wastewater systems: the dominant nitrite‑oxidizing bacterium (NOB) isn’t Nitrobacter — it’s overwhelmingly Nitrospira. And the deeper we look, the more interesting the picture becomes. A subset of these Nitrospira aren’t just oxidizing nitrite… they’re oxidizing ammonia too. That means full COMAMMOX capability inside real‑world wastewater systems.

08/04/2026

Indicator protozoa and metazoa are some of the clearest biological “signals” operators can use to understand how healthy an activated sludge system really is. Because these organisms are far larger than bacteria, they’re easy to spot under a standard microscope and provide fast, actionable insight into system stability, toxicity, and sludge age. When you pair these observations with floc structure, density, and filament presence, you get a simple, reliable snapshot of biological health.

https://asterbio.com/what-looking-under-the-microscope-tells-you-about-biological-health/

07/28/2026

Biological treatment doesn’t fail because the bugs “stop working”—it often fails because the water chemistry shifts underneath them. Do you know the most common chemical parameters controlling microbial kinetics, floc formation, nutrient removal, and overall process stability. If you’re troubleshooting nitrification swings, bulking, cloudy effluent, or ORP drift, this framework will help you see the root causes faster.

07/23/2026

In wastewater systems filaments are often treated as a warning sign. However, in EBPR systems with good PAO populations, Aster Bio’s Microbial Community Analysis has shown that successful PAO development often coincides with higher filamentous bacteria populations than are typically seen in conventional activated sludge.

Wastewater treatment plants with Enhanced Biological Phosphorus Removal EBPR , operate with anaerobic, anoxic and aerobic zones carefully balanced to maintain vital PAO populations. Microbial Communi…

07/21/2026

Activated sludge settling issues don’t start in the clarifier — they start in the floc. It is useful to explore why floc size and density drive effluent clarity, sludge blanket stability, pin floc, bulking, and overall plant reliability. If you’re troubleshooting TSS, rising blankets, or inconsistent compaction, understanding floc structure is one of the fastest ways to get ahead of problems before they hit compliance.

In activated sludge systems, floc is the physical structure determining how well your biomass settles, compacts, and separates from treated water. While we often focus on MLSS, SVI, or clarifier...