SYSTEM OUTLINE

This specification covers the requirements for the design and supply of 48 m3/day Sewage Treatment Plant.
The plant consists mainly of

  • Biological Treatment Tank
  • Root Blower
  • Pump
  • Sand & Carbon Filter System
  • Control Panel

The black and grey water from septic tank is pumped and fed to the biofilter system by submersible pump (automatic operation). In the Biofilter tank, black and grey water that contains BOD and COD is processed by bacteria and the BOD and COD level become lower and can fulfill the requirement of government.

Effluent that goes to the environment inject by oxidizing biocide to kill E- coli (pathogenic bacteria).
 

PROCESS DESCRIPTION

Pollution caused by biological pollutants can affect water conditions in two areas:

  1. Pathogenic microorganisms that consume organic material requiring oxygen for the oxidation process. This can cause the oxygen contained in these waters is becoming less and less, so can result in aquatic life suffers.
  2. Organic material contained in waste water contains nutrients that can lead to the growth of algae or other plants can also remove oxygen from the waters, there was the cutting chain and change the balance present in the aquatic environment

Flow Chart BIO FILTER SYSTEM

SEPARATION CHAMBER

Is a basin that serves to separate the suspended particles which can settled down, out of the waste water which will be poured into the aeration tank, so it can reduce BOD, COD, suspended particles. The basin was conditioned unaerobically. The tub can also be anticipated in case of load fluctuations. This unit equipped with ventilation pipes for line up the gas formed. From this Separation Chamber, waste water will overflow into the Aeration Chamber

 

AERATION CHAMBER

In the Aeration Chamber occur in aerobic biological process which consists of bio media moving and rotating in the aeration basin and is designed to anticipate the problem of “shock load” that usually appears at the wastewater treatment process using the bio media. This can happen because the aerobic processes in the BIO FILTER system can be quickly recovered when there is disruption of the system because the population of bacteria that grow and stick to the bio media is not borne out of the zone of aeration. Bacteria in the aeration basin is sufficiently and constantly process aerobically in the aeration basin, without depending of “return sludge” from the sedimentation tank.

The main system of BIO FILTER wastewater treatment consists of a tank [FRP] with Bio media  layer inside, which has a large surface area per unit volume. All media submerged in waste water. Media under the air injection system is equipped with waste water circulation system for adequate air supply to grow bacteria. Unlike conventional wastewater treatment, in this system, the bacteria grew in media and also on the water itself, so there are two systems of fixed film growth / Attached Growth and suspended growth, with a number of very low solid content of waste water into the system and passes media installed in the aeration basin. The bacteria then attach and grow on media that have a large surface area the size of which can prevent the organic or hydraulic load was suddenly increased

Air supply flowed from air blower using pipe into the waste water, oxygen and waste water circulating through the media, so the bacteria embedded in the media will form metabolism with the waste water. In this unit, with a side shape of the sedimentation chamber, make it is possible for sludge return from the basin settling into the aeration basin, to restore some of the mud which is still active, in order to maintain the stability of the bacteria in the Contact Aeration Chamber, depending on conditions in the field. After going through the process of biological waste water will overflow into the sedimentation Chamber.

 

SEDIMENTATION CHAMBER

 Is a basin where the separation of solid materials with process water, by gravity. The tub is designed in such a way that the solid material is collected at one point. Solid materials in the form of activated sludge. Activated sludge is a collection of microorganisms and microorganism-organic materials that are useful for food for aerobic bacteria contained in the aeration basin. This activated sludge will flow back to the Contact Aeration Chamber automatically because the side type of sedimentation Chamber itself. Water that has been separated from solid materials will be over flow to the gutter which is made such a way that only clean water can flow.

The end result of the process through the overflow pipe, and flows into the city canal (drainage)

 

INFLUENT (SEPTIC) WATER QUALITY

 

INFLUENT PUMP

Quantity                                           1 set
Type                                                 Submersible
Make                                                Ebara
Flowrate                                           6 m3/h (Max)
Head                                                15 mtr (Max)
Motor                                               1.5 kW, 380 V/3 ph/50Hz
Operation                                         Automatic

 

SEWAGE TREATMENT PLANT UNIT

AERATION TANK

Quantity                                           1 Unit
Capacity                                           6 m3
Material                                            Concrete
Tank Size                                         2000 x 2000 x 1500 mm
Complete With                                 Piping Diffuser

 

SEDIMENTATION TANK

Quantity                                           1 Unit
Capacity                                           3 m3
Material                                            Concrete
Tank Size                                         1000 x 2000 x 1500 mm

 

HOLDING TANK

Quantity                                           1 Unit
Capacity                                           2 m3
Material                                            Concrete
Tank Size                                         1000 x 2000 x 1000 mm

 

ROOT BLOWER/UNIT AERATION

Quantity                                           2 sets
Make                                                Longtech or Equal
Motor                                               2.2 kW, 380V/3ph/50Hz
Complete With                               Silencer & Air Filter

AMONIA REMOVAL DOSING UNIT

DOSING TANK

Quantity                                           1 no
Type                                                 Vertical, cylindrical
Capacity                                           150 litres
Material                                            PE-Profil Tank

 

DOSING PUMP

Quantity                                           1 no
Type                                                 Solenoid drive diaphragm, manual adjustment
Make                                                Milton Roy
Flowrate                                          3.6 l/h (max)
Head                                                7.8 m (max)
Material                                          PP

 

 

SAND & CARBON FILTER SYSTEM

FILTER PUMP

Quantity                                          1 set
Type                                                 Centrifugal Multistage Pump
Make                                                Grundfos CR 3-2
Flowrate                                          2 m³/hr
Discharge head                               10 m
Motor                                               0.37 kW, 380V/3ph/50Hz

 

SAND FILTER

Quantity                                           1 set
Capacity                                           2 m3/h
Make                                                Pentair
Operation                                         Manual
Vessel                                               Dia. 16” x H. 65”
Material                                            FRP
Media type                                       Silica Sand
Media Quantity                                250 kg

 

CARBON FILTER

Quantity                                           1 set
Capacity                                           2 m3/h
Make                                                Pentair
Operation                                         Manual
Vessel                                               Dia. 16” x H. 65”
Material                                            FRP
Media type                                       Silica Sand
Media Quantity                                100 kg

 

FINAL TANK

Quantity                                           1 unit
Capacity                                           2 m3
Material                                            Concrete
Tank Size                                         1000 x 2000 x 1000 mm

PIPE AND FITTING

Quantity                                           1 lot
Material                                            CS Pipe (for Blower)
PVC Rucika
Main Size                                         2”

 

CONTROL PANEL

Quantity                                            1 no
Type                                                  Outdoor
Access                                               Front
Material                                             Mild steel with oven baked epoxy finish
Supply voltage                                  380V/50Hz/3ph/4 wire

 

The control panel shall comprise of  following

  • One (1) no main circuit breaker with indicating light

One (1) lot motor starter, each consist of isolating switch, contactor, thermal overload relay, selector switch, and indicating lamp