Package STP

Package STP (Sewage Treatment Plant)

WAPP has developed & launched small capacity skid mounted type package STPs based on SBR technology in Basic &Premium range (Plants requires Minimum manpower.) 

WAPP offer the next generation Pre-Engineered STPs based on the WappSys OXY-BIO process. This “easy-to-install” STP is a standardized engineering product ,developed in-house by R&D team of WAPP. It gives flexibility to users to customize the plant according to their requirements. The Pre-Engineered STP plant is modular and available in various models ranging from 2 KLD – 50KLD &  expandable to 100 KLD. With process automation, it is  a simple yet intelligent product offering.

Package STP

  • These STPs  are suitable for pumped flow and can be installed on ground or terrace. It is  a single unit consisting of biological reactor with all accessories and a filter for polishing of treated water.
  • Available range:2  – 50 KLD in single tank & upto 100 KLD in 2 tank configuration. Ÿ
  • System can be with or without tertiary treatment, depending upon treated water utility Ÿ
  • Tanks in MS/FRP/MS FRP/HDPE.
factsheet of packaged  STP
Plant Capacity  Collection Tank  Area Height Connected Load Sludge Generation
(KLD)  (M3)  (M2)   (M)     (kw)   (kg/d)
2.5 0.5 4.5 3.5 4.6 0.5
5 0.7 5.5 3.5 5.3 1
7 0.9 8 3.5 5.3 1.5
10 1.3 10 3.5 5.3 2
15 2 12.5 3.5 6.2 2.5
20 2.5 14 3.5 6.5 3.6
25 3.1 16 3.5 7.2 4.5
35 4.5 25 3.5 9.7 6.3
50 6.5 30 3.5 12.7 9
We have Basic  & Premium package STP plants:

Parameters Inlet Outlet
Basic Premium
BOD Up to 250   <20 ppm    <20 ppm
TSS Up to 250   <30 ppm    <20 ppm
COD Up to 600   <75 ppm    <20 ppm
pH  7.0-8.0   7.0-8.0    7.0-8.0
  • Basic Package STP:-  Secondary Sewage treatment package w/o tertiary (optional) & mechanical sludge de-watering system.
  • Premium Package STP:- Complete sewage treatment package with tertiary treatment (Ozonization, filtration etc.) high degree of automation & mechanical sludge de-watering system


System Components

Inlet zone

Water filled in the reactor by a specially designed distribution header for complete mixing of sewage into sludge blanket.

Aeration system

Aeration is provided by submerged diffuser  with the help of air blowers.

Decant system

WappSys OXY-BIO incorporates the engineered decanting system. Decanter designed to achieve the desired efficiency.

A tank may have  one or two decanting systems as per the requirement. Baffle plates attached on both sides of decanter to prevent any scum flow with treated water.

Operating cycle

Aeration system designed on the peak load during dry seasons. The operational cycle selected to ensure adequate filling, Aeration settling and decanting to achieve desired quality of treated water.  Aeration time selected to fulfill the oxygen requirement to survive biological mass as well as oxidation of organic compounds and nitrogen. Generally aeration time selected as 1.5-2.5 hours as per the BOD load and MLVSS present in the tank.

Settling time selected for proper settling of biomass to obtain desired depth of clear supernatent, which can decanted in decant phase. Generally 45 minutes of settling time required to obtain clear supernatant layer of desired depth.

Decanter designed for 0.75 hours of descanting time. Decanting can started in between the settling phase if sludge level is sufficiently below the clear water layer.

Decanted water is then filtered through a UV Filter for disinfection.


Why WAPP  for This Particular Product ?

Over the years, WAPP has installed and commissioned plants with various technologies. Whether it is EA , SAFF, MBBR/FAB, CAACO, MBR ,or SBR. Wapp has developed a vast technological knowledge. Based on our ground experience, WAPP now believes that the WappSys OXY-BIO technology is the most versatile for Indian conditions.

Wapp has 20+ years of rich experience in Indian market, have  in-house R&D & manufacturing capabilities for development and production of decanters and PLC (with or without motor control centers).Wapp is now offering SBR technology under the brand name of Wappsys Oxybio with single or multiple tank configurations as desired.

Wapp is continuously investing in the development of technology to closely monitor plants through data logging & remote monitoring.

Wapp offers post sales services in the form of remote monitoring/technical services, AMCs, O&M,&  comprehensive services as a long term solution.

  •      Water ATM
  •      Water Audit ,
  •      Packaged STP MBBR,
  •      SMART RO,
  •      Water Manager