Wastewater treatment system

An apparatus for converting typical anaerobic septic tank system into an efficient aerobic treatment system for treating liquor containing biodegradable wastes, said septic tank system including a septic tank having a cover, comprising:

• (a) a collapsible reactor module positioned in the septic tank, said reactor module having collapsible side walls to permit the reactor insert to fold and pass through an opening in the cover and to unfold upon entry into said septic tank;
• said reactor module having substantially open upper and lower ends;
• (b) a draft tube extending through said module reactor;
• (c) fixed media positioned within said reactor module;
• in surrounding relationship with said draft tube, through which the liquor recirculates;
• (d) an aerator for introducing oxygen into the recirculating liquor in the reactor module;
• and
• (e) an effluent pipe having a first end in communication with an upper portion of said reactor module through an opening in the side wall of said reactor module and a second end in communication with an effluent pipe associated with the septic tank.