Sewage and Waste Water Treatment
Removal of contaminants, micro-organisms, and any other type of pollutant in huge volumes of wastewater before pumping it in rivers, streams and oceans prevents damage to environment and also greatly helps in preservation of water sources.
With the increase in scarcity of water, we can say that wastewater in an untapped resource. Today’s technological developments allow us to realize this and offer advanced wastewater treatment processes.

Moving Bed Biofilm Reactor

Application

The Moving Bed Biofilm Reactor (MBBR) process is a process for treating sewage and industrial waste water using air and bacteria. Waste waters contain organic material and this is measured by the Bio-chemical Oxygen demand (BOD) and Chemical Oxygen Demand (COD) of the waste water. The MBBR process is used to bring down the level of BOD and COD in the waste water for further use or discharge as the case may be. Biofilm processes require less space than activated sludge systems because the biomass is more concentrated and this is an advantage of the MBBR process.

Operation.

In this system, there is an aeration tank which has special plastic carriers. These plastic carriers provide a surface for the biofilm to grow. The carriers are made of a material which has a density close to that of water and are mixed in the tank and kept floating by the aeration system and to have a good contact between the organic matter in the wastewater and the biofilm on the carriers. Suitable sieves are provided on the tank outlet to prevent the plastic carriers from escaping the aeration system. Since the biofilm is retained in the tank, there is no requirement of recycling sludge from the post aeration settling tank back to the aeration tank inlet. This makes the system simpler as compared to the activated sludge process.