Packaged STP are Membrane Bio Reactor based Sewage treatment and recycling plants. It is indigenously developedfor meeting stringent treated water norms for sewage water and various other ETP's. It works on principle of biologicaldigestion followed by specially designed submerged hollow fiber membrane filtration. Hollow fiber membranes havepore size of 0.06 micron which ensures removal of pathogens and bacteria in treated water. STP is acombination of membranes, pumps and other electrical equipment's which makes itself unique in operation and havinghassle free maintenance.
Simple and easy installation, low operation and maintenance.
Installation of sewage treatment plants reduces risk to public health and the environment.
Sewage Treatment Process:
1. Preliminary Treatment: This is the first stage of the sewage treatment plant process and its main objective is the removal of coarse solids and other large materials often found in raw wastewater. Preliminary treatment operations typically include large filtering screens, grit removal and, in some cases, breaking of large objects. Excess grit causes severe pump blockages thereby affecting a range of subsequent treatment pumps. Flow measurement devices, often standing-wave flumes, are always included at the preliminary treatment stage.
2. Primary Treatment: The main purpose of this treatment is to reduce any heavy solids (organic & inorganic) that settle to the bottom by sedimentation while oil, grease & lighter solids float to the surface by skimming. The settled and floating materials are removed and the remaining liquid may be discharged oSTP or subjected to the next stage i.e. secondary treatment. Primary treatment removes about 60% of suspended solids from wastewater.
3. Secondary Treatment: The prime objective is the further treatment of the effluent from primary treatment to remove dissolved and suspended biological matter. The biological solids removed during secondary sedimentation, called secondary or biological sludge, are normally combined with primary sludge for sludge processing. Secondary treatment may require a separation process to remove the micro-organisms from the treated water prior to discharge or tertiary treatment. Secondary treatment removes more than 90% of suspended solids.
4. Tertiary/Advanced Treatment: Tertiary treatment generally follows secondary treatment and aids the removal of those wastewater constituents which cannot be removed in secondary treatment. Treated wastewater is sometimes disinfected chemically or physically (for example, by lagoons and microfiltration) prior to its discharge into the receiving environment (sea, river, lake, wetlands, ground, etc.)packaged sewage system, wastewater stp
