Combination of Microscopic Tests of the Activated Sludge and Effluent Quality for More Efficient On-Site Treatment

Container on-site wastewater treatment plants are systems of growing interest in the areas where sewer cannot be implemented. In this study, container plant with low-loaded activated sludge has been examined. The aim study was: (i) to assess efficiency plant; and (ii) evaluate relationship between condition selected parameters effluent quality. Effluent quality characterized by reliability factor (RF) technological purity index (TPI). Sludge assessment covered measurements volume (Vo), dry matter (DM), (SI), unit oxygen consumption rate (UOCR). Microscopic analysis performed morphological (flocks) biotic (sludge index, SBI) sludge. research completed an measurement dissolved concentration chamber 30 s intervals. Results confirmed a significant (p < 0.05) correlation (CC = ?0.9277) biochemical demand (BOD5) SBI for level aeration 1–2 mg/L. Negative also found electrical conductivity (EC) ?0.7478). examined case, optimal EC was range 600–800 µS/cm.