Primary Treatment

Primary Wastewater Treatment Design:

Coarse Solids Removal is the first step in some of our treatment process.  Large coarse solids (anything >0.05 cm or >0.02 inch sizes) are removed to prevent damage or plugging up of downstream units including pumps and mixers. Our field tests have proven that Rotary Drum Screen technology is much superior to competing shaker-screen and hydro screen technologies.  Cost savings of the system over competitive technologies provide a payback of two years or less.  The Rotary Drum is a mechanical separation device.  The system has a rotating drum made out of stainless steel (SS) wedge-wire that does the separation.  The system’s continuous back-wash capability prevents a need for continuous maintenance.  The wastewater is pumped inside an overflow weir in the Drum system.  The large solids are separated and passed forward to exit the system, while the water passes through the screen into an equalization tank.  The system is fully automated and does not require constant operator attention.


Anoxic Biological Treatment and Equalization Engineering:  Flow of wastewater in an industrial operation constantly changes in both concentration and pH.  The equalization process minimizes hour-to-hour variation in wastewater flow and composition, and prevents shock from upsetting the downstream chemical or biological process.  The equalization system has a plug flow type mechanism to prevent short-circuiting of un-mixed wastewater.  To insure that the design parameters of downstream processes are met, pH, COD, and TSS levels are checked in the equalization tank.  The wastewater treatment plant operator is encouraged to monitor this system making sure that the mixer is operating properly.