Activated sludge process
Activated sludge is a process for the treatment of sewage and industrial wastewater, which was developed between 1912 and 1914. Atmospheric air or pure oxygen is introduced into a mixture of primary or screened sewage (or industrial wastewater) and organisms to form a biological flock that reduces the organic content of the sewage.
MBBR – Moving Bed bioreactor
Medium or small scale wastewater treatment plants require easy composition and easy maintenance of the equipment. The Bioreactor type Moving-Bed has greatly simplified the washing mechanism by washing the filter media parallel to the reactor process.
SBR -Sequence batch reactor
Batch sequencing reactors (SBRs) or batch sequential reactors are industrial waste water treatment processing tanks. SBR reactors treat waste water such as sewage or anaerobic digester output or biological mechanical treatment plants in lots. Oxygen is bubbled through the waste water to reduce the demand for biochemical oxygen (BOD) and the demand for chemical oxygen (COD) so that it can be discharged into sewers or used on land.
MBR – Membrane Bioreactor Technology
Membrane bioreactor (MBR) technology is an integration of biological treatment and membrane filtration into a single process, in which microorganisms are responsible for organic and nitrogen removal, while membranes capture biomass and suspended solids physically from the mixed liquor. The MBR process utilizes microfiltration (MF) or ultra filtration (UF) technology ranging from 0.05 to 0.4 µm to enable complete retention of bacterial flocs and suspended solids. MF membranes are responsible for removing suspended solids, algae, protozoa, and bacteria, while UF membranes can additionally retain small colloids and viruses.
There are two main MBR process configurations: submerged or immersed (iMBR), and side stream (sMBR), iMBRs are generally less energy intensive than sMBRs, as implementing membrane modules in a pumped side stream cross flow significantly increases energy demand due to high pressures and volumetric flows imposed. sMBRs typically operate at higher flux and hence tend to experience higher fouling propensity (i.e., lower permeability) than iMBRs. As such, the current trend in MBR design encourages submerged over side stream configurations.
The configuration of membrane plays a crucial role in determining the process performance. There are mainly three types of membrane configurations that are being used in MBR technologies: 1) plate-and-frame/flat sheet (FS), 2) hollow fiber (HF), and 3) multi tubular (MT). In FS membranes, the fluid flows from the membrane’s coated side towards the permeate side. In MT module, fluid flows from inside towards outside the tube (lumen to shell-side), whereas in HF configuration fluid flows from outside towards inside (shell to lumen-side).
SAF -submerged aerobic filter
This system consists of partially or totally submerged biological support material and improves the efficiency of biological filtration. In submerged or flooded aerobic filter, effluent flows down through a bed of small natural or plastic media. Injection of air into the base of the bed. It is therefore possible to apply waste water at a much higher rate than conventional filters. This is the second stage of filtration below the injection point where solids generated in the upper aerobic mixed zone are removed. Solids, when accumulated in the lower filter stage, reduce the critical clearing stage by washing back. Wash water is returned to the settlement treatment plant.
UASB – Up flow anaerobic sludge blanket reactor
The Up flow Anaerobic Sludge Reactor (UASB) is a single tank system. Waste water flows from the bottom into the reactor upwards. A suspended sludge blanket filters and processes the waste water through the sludge.
Lagoon Aeration Systems
An aerated lagoon or aerated basin is a holding and/or treatment lagoon equipped with artificial aeration to promote the biological oxidation of wastewaters , For example, sludge activated, trickle filters, biological contactors rotating and biofilters. They all share the use of oxygen (or air) and microbial action for the biotreatment of pollutants in waste water.
The treatment of wastewater with an oxidation ditch is comparable to the treatment of wastewater in a packaged plant. However, the oxidation ditch replaces the aeration bowl and better treatment of sludge
Grey water treatment systems
Greywater is waste water generated by domestic activities such as washing, dishwashing and bathing, which can be recycled on site for applications such as landscape irrigation and built wetlands. Greywater differs from the toilet water which is designated as sewage or blackwater to indicate that it contains human waste.
Customized Water Purification Systems
WABCO International manufactures a wide variety of customized water treatment systems designed for different measurements, specialized parts or property. The pieces that are engineered are dedicated to comply with all your personalized requirements, specialized parts and other necessary components.
Almost all the all water treatment designs begin with the water feed source and analysis of the raw water. In addition, the flow rate of the water being treated is also required just like the quality of the water in the product.
With this information at hand, one of WABCO personnel can begin to build treatment options that are economical and efficient. Many times WABCO can make use of any of your own predesigned components that have been proven to function and have lower costs than customizable configuring. Nevertheless, if one pre-engineered solution doesn’t fit, our engineers at WABCO have the capacity and experience to find or create what will work with greater efficiency.