Packaged Sewage Treatment Plant

This type of process can be applied both to treatment plants for the biodegradation of organic material as well as for installations with nutrient elimination, in urban and industrial wastewaters

         Initially fixed bed systems were used, however it was discovered that this type of process show a series of operational inconveniences such as the blocking of the bed because of the excessive growth of the biomass, this makes periodical cleaning obligatory. These drawbacks have caused the need for the creation of simple biofilm processes that eliminate them and that ease their operation; these are the moving bed processes.

       The moving bed processes come from the current trend in wastewater treatment, from the use of systems that offer an increased specific surface in the reactor for the growth of the biomass, achieving significant reductions in the biological reactor volume.

                 The basic principal of the moving bed process is the growth of the biomass on plastic supports that move in the biological reactor via agitation generated by aeration systems (aerobic reactors) or by mechanical systems (in anoxic or anaerobic reactors). The supports are made from plastic with a density close to 1 g/cm3 letting them move easily in the reactor even when the capacity reaches 70%.

MBBR PROCESS

         It allows the generation of a characteristic biomass for each type of reactor (aerobic, anoxic or anaerobic) bringing about the creation of a biofilm with a high level of activity. Experimentally it has been confirmed that the levels of nitrification and denitrification in this type of processes are greater than those obtained in conventional process.

The operation and control is simple for this type of processes.- On the one hand the process avoids blockage problems and consequently regular cleaning periods, in addition it is not necessary to control the sludge purging since the system keeps the biomass in the reactor until it comes off the support.

      It does not require reactor biomass recirculation This gives rise to the fact that the biomass does not depend on the final separation of the sludge and as a consequence typical problems found in conventional activated sludge processes related to the sedimentation properties of the sludge (filamentous bulking, etc.).

They are very flexible processes since they are based on the percentage of plastic support used in the reactor, it is recommended that it is not greater than 70%, the surface can be modified and as a consequence the efficiency of the process.

A reduction in the volume of the biological reactor because it uses a support or carrier that gives a high specific surface.

        The basic process is based on MBBR technology using AMB Bio Media. There are many plants installed and satisfactorily operating on MBBR principle. MBBR has following advantages over other competing technologies.

AQUA REVOLUTIONS MOVING BED BIO REACTOR (MBBR) DESCRIPTION

After the aeration stage, the Mixed Liquor (microorganism and wastewater) enters the final settler. Here the velocity of the wastewater is slowed to allow for the biomass to clump together and settle to the bottom while allowing the clear water to flow to drain. Sludge transfer pump return the settled sludge from the bottom of the settler to the primary settler where it is stored until ready for disposal.

       The aeration is based on Moving Bed Bioreactor Reactor (MBBR), which incorporates the latest technology for compact treatment systems. The system is based on bio media, which is placed in the aeration tank. In the aeration tank the majority of In the Aeration tank the majority of pollutants are removed. This treatment phase utilizes microorganisms to remove the food and nutrients (pollutants) that are present in wastewater. As the wastewater enters this particular phase of treatment, the microorganisms are introduced. The aeration tank is agitated with diffused air that is fed by an air blower, and dispersed in the tank with coarse air diffusers. Air maintains an aerobic environment (dissolved oxygen present) in a mixed liquor of wastewater and an activated sludge, which contains microorganisms that upon contact will absorb organic matter from the waste water and convert it to additional biological cells (activated sludge) and respiration products CO2 and H2O. The activated sludge developed in the aeration tank is flocculant and settles. It readily separates from treated wastewater. After aeration tank the sewage is directed to final settler.

   Domestic wastewater flows by gravity to the primary settling tank. In this tank the heavier waste material settles down by gravity and lighter material such as oil and grease floats on the top. The pre-clarified wastewater then is transferred to the MBBR 1 1through a dip pipe. The AMB bio media serves as growing area for aerobic microorganisms. Wastewater then flows to MBBR 2 as a second stage polishing of organic material.  

DESCRIPTION OF FLOW SCHEME

Compact
Odurless
Maintenance Free
Noiseless
Chemical Free