Overview:

• STP is an advanced ‘plug and play’ waste water treatment system featuring the submerged bio media. STP is engineered to provide a high-quality effluent, treated to pollution control board standards and suitable for a variety of reuse applications.
• On the contrary to Pre-assembled and modular STP, above ground On-site Sewage Treatment plant is flexible is design and construction.
• Bioreactor, settling tanks & chlorine contact tanks are built in concrete tanks open topped with safety railings around access points. MEP (Mechanical, Electrical and Piping) equipment’s i.e. sewage feed pumps, MBBR & tube settler media, RAS Pump, aeration blower& fine diffuse are supplied in loose form and dosing systems, Tertiary system, monitoring and control systems are skid mounted make installation very flexible as per site conditions.
• The factory fitted and tested equipment’s along with semi / Automatic control panel includes full process Monitoring and data logging functions.

Type:

• Moving Bed Bio-Reactor (MBBR)
• Sequential Batch Reactor (SBR)
• Membrane Bio Reactor (MBR)

Treatment Process for MBBR:

• Sewage treatment plant is a fully / semi-automated waste water treatment system incorporating the following process stages:

1. Inlet screening
   2. Primary / Anoxic tank
   3. Aeration Tank
   4. Secondary Settling Tank with PP tube media.
   5. Chlorine Contact tank
   6. RAS and sludge removal
   7. Tertiary Treatment for polishing

All tanks are built in concert and equipment installation is done on-site.

Treatment Process for MBR:

• Membrane Bio Reactor waste water treatment system incorporating the following process stages:

1. Inlet screening
   2. Primary / Anoxic tank – DE nitrification
   3. Aeration / Membrane Bioreactor tank -Nitrification
   4. Submerged membrane filtration modules
   5. Permeate receiving and disinfection
   6. RAS and sludge removal

Working Principle:

• The heart of STP is design of aeration tank and bio-media as it removes organic impurities through a biological process. The biological process involves growing millions of bacteria that eat up organic impurities. Thousands of Virgin PP media pieces provide larger surface area for quick bacterial growth. Bacteria get attached to the surface of media-piece sand gets detached after attaining mass and age, giving room to other bacteria to grow at the surface of the media.
• Continuous and right supply of air through Diffusers provides mobility to the media and the sewage, for accelerated biological growth of bacteria… and provides vital oxygen for bacterial growth. STP Technology ensures that Food and Mass Ratio is continuously maintained uninterruptedly throughout the process for desired level of Mixed Liquor Suspended Solids (MLSS) which is critical for subsequent processes.
• The mixed-liquor largely free of organic impurities, with controlled levels of Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD), overflows to the next chamber for settling and filtration process.
• And for all institution and industrial premises which have laundry water facilities, we at NK provide optimum use of treated laundry water with economical and innovative technologies.