Cement septic tank for waste water under construction.
Opening septic tank lid. Cleaning and unblocking septic system and draining pipes.
the man opened the cover of the sewer manhole to pump out the sewage.
Grease trap, waste disposal,Waste water treatment ponds, waste water disposal procedures
Grease trap, waste disposal,Waste water treatment ponds, waste water disposal procedures
Waste water treatment ponds from industrial plants