1. PROGRESS REPORT FOR RB PROJECT TILL 02/06/15
1. EQUALUZATION TANK:
The project started with septic tank cleaning. It is 60 m3
tank in which industrial waste/ effluent of entire plant
would accumulate. The tank has rectangular base area of
40 ft2 approximately. Submersible pumps were used to
remove water and subsequently, sweepers put out all
the sludge manually and disposed it into drain. All safety
measures were adopted during the entire cleaning
process. Compressed air line was provided so as to avoid
short of breath problem. The man holes were kept open throughout in order to avoid
accumulation of toxic gases inside the tank. Once the cleaning process was completed, floor
was leveled using concrete. It was strengthened using SBR binder. The floor was allowed to
cure and dry.
Then concrete blocks for the aeration header were plastered to the surface. They were installed
in such a way that the aeration header lies along the centre of the tank. As there are three
portions in the tank, core cutting was done to allow passage of header from one compartment
to another. The header (3’’) was then installed, 100 mm from the underground level, supported
by blocks. They were further clamped with u bolts and were then coated with concrete. All
remaining pebbles were removed from the tank after installation.
Diffusers serve the medium for the aeration. They are
coarse bubble diffusers, which provide efficient mixing
followed by growth of micro-organisms, which are actually
responsible to carry out the process, i.e. decreasing COD &
BOD. Diffusers are attached to the aeration header. Silicone
is used to provide water proofing.

2. PROGRESS REPORT FOR RB PROJECT TILL 02/06/15
Two submersible pumps are also placed, that will
transfer the water to the bio reactor, delivering pressure
of about 1.5 bar. 2’’ line is connected to the pump
outlet, evolving from a cut out provided for this purpose.
These lines connect to a header from which a common
emerges, connecting the septic tank and the reactor.
Double union ball valves are provided followed by NRV
to prevent back flow. Line (1/2’’) for pressure gauge is
also provided. A frame is fabricated for the cut out,
coated with red oxide to prevent corrosion. Checkered
plates have been fabricated. Ropes are provided to
facilitate easy removal of pumps when required. A drain
line is provided to with draw water outside the factory.
This is provided for safety measures, i.e. avoiding entry
of dead organisms into the reactor. Supports are
fabricated as required.

3. PROGRESS REPORT FOR RB PROJECT TILL 02/06/15
2. SUPPORTS FABRICATION AND INSTALLTION:
Three types of E supports were designed and fabricated
for the piping spool and cable trays. They were coated
with red oxide and painted royal blue color. The spool
and cable trays were then run on the supports.
3. CONSTRUCTION OF PIT:
It started with excavation of pit having approx.
dimensions of 5*5*5 ft. during excavation seepage water
starts accumulating. Therefore, padlo was used to cater this problem. After then pit was given
physical structure using wooden planks. Iron reinforced concrete was used for its construction.
It was then left for some days to cure and dry. The floor was later on plastered.

4. PROGRESS REPORT FOR RB PROJECT TILL 02/06/15
An enclosure of material SS 316, was fabricated
for the bar screen. Bar screen having dimensions
of about 1600*900 mm, will be placed at an
angle of 45ᴼ. This bar screen is responsible to
retain all the solid material present in the
effluent. Rawl bolts and concrete support the
enclosure. Later on ceiling for the pit is laid using
reinforced concrete.

5. PROGRESS REPORT FOR RB PROJECT TILL 02/06/15
A cavity is provided for manhole frame and
checkered plate. Finally bitumen diluted in
turpentine oil is coated on the outside wall to
prevent entry of seepage water into the pit.
4. BLOWER INSTALLATION:
Blower is palced on the foundation pad. The line (3’’) originating from the septic tank is
connected with the 1.5’’ line, attached to the blower, through a reducing bush.