Petroleum refining and organic chemical combine high strength effluent with many resistant or quasi-resistant compounds present in their wastewater influent. The resistant nature is often compounded by changes in composition or concentration on a frequent basis. Aster Bio works with industry to buffer the impact of both influent variation and new resistant compounds. Our goal is to keep the biological unit operating at full efficiency. Thereby, reducing the use of polymers, activated carbon, and anti-foams to control biological inefficiency.