STP (Sewage Treatment Plant)

Sewage Treatment Plant or simply STP is a highly demanded product amongst others in Allied Enviro company. The company is providing repairs and maintenance services in all over India at an affordable price and through the expert and efficient engineers. Sewage treatment is performed to clean the waste water underlying in land. This waste water is the result of domestic and commercial disposals, rain water etc. Thus, sewage treatment is performed to remove the majority of the contaminants lying in waste water and to produce the smooth flow of liquid which should be environment friendly. Apart from this, it helps in keeping the environment clean.

Technologies used in Sewage Treatment System

MBBR (MOVING BED BIOFILM REACTOR)

MBBR technology employs thousands of polyethylene biofilm carriers operating in mixed motion within an aerated wastewater treatment basin. Each individual biocarrier increases productivity through providing protected surface area to support the growth of heterotrophic and autotrophic bacteria within its cells. It is this high-density population of bacteria that achieves high-rate biodegradation within the system, while also offering process reliability and ease of operation. This technology provides cost-effective treatment with minimal maintenance since MBBR processes self-maintain an optimum level of productive biofilm. Additionally, the biofilm attached to the mobile biocarriers within the system automatically responds to load fluctuations.

MBR (MEMBRANE BIO-REACTOR)

The term 'membrane bioreactor' (MBR) is generally used to define wastewater treatment processes where a perm-selective membrane like microfiltration or ultrafiltration is integrated with a biological process – a suspended growth bioreactor. Membrane bioreactor (MBR) technology has emerged as a wastewater treatment technology of choice over the activated sludge process (ASP), which has been the conventional municipal wastewater technology over the last century. MBR is, in fact, one of the most important innovations in wastewater treatment, as it overcomes the drawbacks of the conventional ASP, including large space requirement for secondary clarifiers, liquid–solid separation issues, production of excess sludge, and limitations with removal of recalcitrant. MBRs have been used for both municipal and industrial wastewater treatment and reclamation. An MBR is a hybrid of a conventional biological treatment system and physical liquid–solid separation system using membrane filtration in one system.

SBR (SEQUENCING BATCH REACTOR)

Sequencing batch reactors or SBRs use a separate pre-treatment section to mechanicallyholdbacksolidsanda biological aeration and settling tank. Small SBR wastewater treatment systems clean incoming wastewater over a number of cycles. The wastewater goes first into primary treatment (1st chamber), where the solid substances are retained. From there, the wastewater is fed into the SBR tank (2nd chamber). The actual biological cleaning by microorganisms now takes place in the SBR tank. Short aeration and rest phases alternate in a controlled cleaning process. The so-called activated sludge can now develop with millions of microorganisms and clean the water thoroughly. A rest phase now follows, during which the live sludge sinks to the bottom of the system. This allows a clarified water zone to form at the top of the SBR tank. The purified wastewater is now fed into a discharge system (stream, river, lake) or into an infiltration system. Afterwards, the sludge is fed back from the SBR tank into the first.

SAF (SUBMERGED AERATED FILTER)

The SAF is an up-flow bioreactor which employs a high efficiency neutral buoyancy plastic media. The SAF consists of a containment vessel made in either GRP, GCS, coated mild steel, stainless steel or concrete with internal dividing walls, internal air and water distribution systems, charge of plastic media and internal support structure. The media provides a large surface area on which the bacteria attach themselves to grow and live. Wastewater is introduced into the base of the SAF unit. Air is introduced into the SAF through a separate diffuser system also located near the base of the unit. An air blower supplies oxygen to the SAF environment on a continuous basis. The air and water distribution system design is such that it creates a very effective mixing pattern within the SAF. This pattern allows for rapid distribution of the wastewater throughout the packed media bed. This produces a homogeneous solution in full contact with the entire microbial population for the period of time that the wastewater is in the reactor.