Packaged wastewater treatment system is compact, pre-assembled and factory tested plant. Ancillary equipment, including process pumps, valves, instruments and controllers, are housed in a single container. The self-contained system outperforms conventional treatment alternatives, offering superior quality effluent, reduced operating costs, small footprints, and more reliable performance. Modular packaged plants are pre-engineered and fabricated, then delivered to the site in 20 feet or 40 feet ISO open-top shipping containers, which minimize on-site construction and installation costs and ensures quick delivery and plant start-up. Two types of packaged plants are available depending on effluent water quality and flow capacity. Patented submerged block membranes (SBM) are key to high quality effluent. Patented modular surface oxidation (MSO) units can be substituted for SBM to meet site-specific effluent requirements of large quantity treatment. Advanced nitrogen and phosphorus removal process can be added to the system. PLC monitors entire treatment system and automatically makes adjustments to ensure peak operating efficiencies.