Municipal Waste | Wastewater Treatment design, build and operational support systems - TMDH

Municipal Waste

TMD Municipal Waste systems are installed in both small and large-scale situations and can significantly improve overall plant performance through enhancement of treatment efficiency and effectiveness of sewer lift stations, waste treatment ponds, and effluent outfalls.

TMD systems are tailored and installed for the direct purpose of reducing oil and grease, sludge, sulfides, ammonia, Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD). The TMD technology applies fine pore media inoculated with immobilized specific microbial species to treat a selected waste stream. Constituents, flow, and concentrations of untreated wastewater are specific to each region of the world and the design parameters of the TMD treatment processes can be adapted for each of the specific regions.

The TMD process can be used to construct new treatment plants or improve the operation of existing treatment plants. A new TMD treatment plant consists of fine screens followed by aeration basins, TMD Immobilized Bio Reactors (IMBR) to seed the aeration basin, rotating disk filters or micro filtration to remove suspended solids, processes for disinfection, and material handling for discharge. Solids handling is limited to compacting and disposing of the solids removed from the influent fine screen and stabilizing the solids removed by the rotating disk filter or micro filtration. The volume of solids produced from a TMD plant will be a nearly undetectable fraction of the solids produced in a conventional treatment plant.

The TMD process can be used to upgrade existing treatment plants which are organically over loaded or are failing because of toxic effects from petroleum hydrocarbons, chlorinated solvents, high chloride concentrations, semi volatile compounds and other chemicals toxic to the activated sludge and fixed film reactor processes. The upgrade of an existing treatment plant is based on supplementing the existing bacterial populations with specific species that are carbon consumers as well as nitrifiers. In a TMD upgrade, seeding bioreactors (IMBR) grow the microbes introduced into the aeration basins. The upgraded plant can be designed to achieve secondary and tertiary levels of treatment. It is also possible to design for the achievement of potable or ultra-pure water standards.

The TMD process can be used to expand the capacity of existing wastewater treatment plants by upgrading the existing process and constructing a parallel processing train to the existing system. The TMD system consists of a fine screen followed by an aeration basin, seeding units, filtration and disinfection. TMD seeding bioreactors (IMBR) can produce both carbon degraders and nitrifiers for reduction of BOD and Nitrogen in a single step. The TMD system is a flow through process and the microbial population within the aeration basins will carry through the plant. For traditional municipal systems having significant infiltration and inflow, the microbes can potentially wash out of the system. The growth rate of the microbes in a TMD-enhanced system, however, is rapid and repopulates the basins in substantially less time than other manual repopulation methods.


"The care of the earth is our most ancient and most worthy, and after all our most pleasing responsibility. To cherish what remains of it and to foster its renewal is our only hope."
- Wendell Berry