Types of Sewage Treatment Plants

Over the years Akar has specialized in several niche market segments. Hospital segment is one of the most significant of the markets covered by Akar. Since the year 1998, Akar has supplied water treatment plant and sewage treatment plants to seven hospitals in India. One of them is one of the largest hospitals in India. Apart from hospitals, Akar has supplied water treatment plants and waste water treatment plants to research centers and health establishments.

Akar was entrusted the work of first designing and then supply of equipment, installation, commissioning, testing and handing over of the Water Treatment Plant for treatment of borewell/municipal supply water to make it suitable for all the application of the hospital such as cooling tower, laboratory, drinking water etc. The equipment supplied, installed, commissioned were RO plant, Water Softening plant, De-Alkalizer, Milipore Ultra Pure water for Laboratories. The plant was successfully commissioned in November 2003. Similarly, NEIGRIHMS is a 500 bed hospital constructed and operated by The Central Government in Shillong, Meghalaya. This was a mega project under the Central Govt. and this hospital is one of the largest in India and the largest in the North East India. Akar designed, engineered, constructed, supplied all equipments for and installed commissioned Sewage Treatment Plant in 2006. Akar is also operating and maintaining this plant for two years. The Sewage Treatment Plant has the capacity of 1 MLD and is based on the extended aeration principle. The STP consists of screen, collection tank, aeration tank, clarifier, sludge digester, filter press, dual media filters and diffused aeration system.

A number of sewage treatment plants have been supplied by Akar to schools and educational institutions. Most of them recycle sewage for horticulture applications. Seen in the picture is a sewage treatment plant supplied to Birla Public School In Pilani. Secondary treatment generally refers to the process involving biological treatment which may be aerobic or anaerobic in nature. This consists of aeration, clarification, sludge digestion, sludge thickening, sludge drying or sludge minimization etc. All systems supplied by Akar generally include secondary treatment with some exceptions.

Akar has supplied many sewage treatment plants for big and small hotels and resorts. Normally, hotels and resorts have two major wastewater related problems viz.: sewage from toilets and wastewater from kitchens (which contains higher oil). There is also a possibility of wastewater from laundry. Normally hotels employ aerobic sewage treatment systems. This is so that there is no foul smell. Aerobic systems when operated efficiently give no foul smell. Many hotels and resorts prefer underground treatment plants to avoid its visibility to their clients or visitors. Akar has many such underground plants operating in India and abroad. Akar has also made a significant innovation by introducing compact Sewage Treatment Plants underground made in either steel or civil constructions. These plants use bioreactors principal to reduce the retention times and speed up the biological degradation process. Due to this the footprint occupied by these plants are much less. In cities where space is at a high premium, these plants have found a very favorable response from clients.

The Sewage Treatment Plants used in residential complexes may not be very much different than those used in Hotels and resorts. In recent times many new colonies have come up in posh (effluent) localities, requiring Sewage Treatment Plant to be located in a discreet way preferable non visible or presenting a good look and having non foul spell at all. Akar has successfully met this challenge by supplying its ADBR systems at many places. Akar supplies its packaged ADBR (Akar Dynamic Bio-Reactor system) system. Akar ADBR is a packaged compact mobile Sewage Treatment Plant, which can be mounted on a truck bed or a trolley or even on a trailer. It is already mounted on a skid and is manufactured such that it can be easily transported as a mobile unit or in a container for easy mobility. The ADBR system uses 65% less space and energy. The detail of ADBR systems are given exhaustively in this website under the heading "Mobile Sewage Treatment Plants".