Concrete septic tanks are treatment facilities that utilize sedimentation and anaerobic fermentation principles to remove suspended organic matter from domestic wastewater. The corrugated fiberglass septic tanks are internally equipped with baffles, which have holes misaligned vertically, preventing short-circuiting and dividing the entire tank into three sections: a primary anaerobic chamber, a secondary anaerobic chamber, and a clarification chamber. The bottom of the primary and secondary anaerobic chambers are interconnected and internally fitted with "MDS Special-Type Filler."

Shenyang Xinmin City Shiming Cement Products Factory produces and customizes a variety of cement products, including ready-made round cement manholes, square cement septic tanks, cement rainwater pits, round cement sewage wells, square cement cable wells, cement heating network wells, cement communication wells, cement reservoirs, cement fire ponds, cement grease interceptors, and checkwell adjustment pipes in various sizes.