Mr. Surinder Kumar,
Additional Director (S),
Govt. of India, MOEF,
Northern Regional Office,
Bays No. 24-25,
Sector-31, Chandigarh.160030.
Subject:
Ref:
Construction of Housing/commercial project namely “Royal Business
Centre” in the revenue estate of Singhpura, Tehsil Dera Bassi, District SAS
Nagar.
Your File No.5-435/2013-RO (NZ)/114 dated 29-01-2015
Dear Sir,
Reference of your File No. 5-435/2013-RO (NZ) /114 dated 19-01-2015 regarding the above
said subjects. In this regard, we are here by submitting compliance of your letter as under:
Sr. No
OBSERVATIONS
1.
Component wise construction status till date
along with %age of work done with
photographs and remaining construction
work.
2.
The design details of Sewage Treatment Plant
and the construction status.
3.
Submit the details of infrastructure and
medical facilities provided to the workers
along with expenditure till date.
4.
5.
6.
7.
COMPLIANCE
About 45% construction has been
done till date.
Feasibility
report
attached
as
Annexure-I.
Temporary house has been provided to
the workers for staying. All workers
are contractual.
The quantity of muck excavated so far from The quantity of muck excavated has
the construction sites and the sites of disposal. been used at site for leveling and
It may be confirmed whether the sites have filling.
been restored or not simultaneously.
Submit the schedule for completing rain water The completion of RWH measures
harvesting measures and number of recharge will completed along with other
pits completed so far.
works.
Submit the details about the area covered, no. About 35% area has been marked for
of plants planted, species of the plants planted green belt and 200 plants of different
and the expenditure incurred on the varieties have already been planted.
plantation.
Expenditure incurred till date is about
Rs 2, 45,000/- (Rs. Two Lacs Forty
Five Thousand Only)
Submit forest approval letter from NRO, The project proponent has been
Ministry of Environment, Forests & Climate applied to NRO, Ministry of
Change for the forest land involved in the Environment, Forests & Climate
project.
Change for NOC of forest land
involved in the project.
This is for your kind information please,
Thanking you.
Yours truly,
Motia Developers (P) Ltd
(Authorized Signatory)
Annexure-II
FEASIBILITY REPORT
The Residential complex will be having provision for 880 No. flats of 2 & 3 Bed rooms and 100 Nos.
flats of EWS and in commercial complex will have shops, multiplex and food court. Considering, 5
members in 2&3 bed rooms per flats, 3 members for EWS flats and commercial complex, and the
population is expected to be about 5820. The details of water requirement are as under:
a) The estimated water requirement for the residential complex is as follows:
S. No. Description
a.
b.
Apartment Blocks
No. of Dwelling Units = 880
Population @ 5 persons/DU
EWS
No. of Dwelling Units = 100
Population @ 3 persons/DU
No. of
Units
Population
880
Daily
Total
Water Water Req.
Req.
LPD
per
unit
No. of Dwelling Units =
836
= 4400
836
135
5,94,000
100
=
836
300
135
40,500
c.
Maintenance and Security Staff
L.S
20
45
900
d.
L. S
100
15
1500
f.
Visitors
Drivers, Delivery men, Courier
persons, casual labor etc.
Club
Adhoc Provision
Commercial Block
g.
Food Court/Restaurant
e.
Total Water Requirement for Complex
2,000
1000
40
40,000
5,000
6,83,900
Say 684
KLD
b)
CAPACITY OF SEWAGE TREATMENT
Quantum of waste water generated
= 684KLD x 0.80
= 547KLD
or Say = 550 KLD
It is proposed to provide a sewage treatment plant of capacity 600 KLD in three models.
CHARACTERISTIC OF UNTREATED SEWAGE
Inflow Conditions
Flow
m3/day
600
BOD 5, 20oC
mg/l
300
COD
mg/l
450-550
TSS
mg/l
250
Oil/Grease
mg/l
20-50
pH
6.5-7.5
CHARACTERISTIC OF TREATED SEWAGE
pH
:
6-9
TSS
<
100mg/l
TDS
<
2100mg/l
BOD
COD
<
<
30mg/l
250mg/l
TREATMENT PROCESS DESCRIPTION:
The sewage is collected in a tank, called sewage sump or Sewage Collection tank. The
sewage from sump will then be constantly pumped into the Sewage Treatment Plant
(STP) by employing sewage lift pumps at a constant flow rate. Piping arrangement is
also made to re-circulate the effluent to enable the contents of the sewerage collection
tank be in a mixing state.
The STP comprises of Bar Screen, Collection Tank, SAFF Reactor with aeration
system, Secondary Clarifier (Tube Settler), Chlorine contact chamber and Treated
Sewage Holding Chamber, SDB and Dual media filter.
As it is a biological system it has to be operated continuously all 24 hours and there by
constant feed of sewage is required. The equalized effluent is passed through the screen
to enable trap the floating debris if any and then passed on to the aeration tank to
oxidize the organics to CO2 & H2O by the aeration. SAFF Reactor is fitted with fixed
filter media & no. of air diffusers to be providing necessary dissolved oxygen.
As SAFF is designed based on extended aeration principle, minimum sludge is
produced. The secondary clarifier/tube settler, which designed on low overflow rate, is
provided after the aeration tank to enable separation of solids. A steep slope is provided
in the secondary settling tank to eliminate the need of scrapper mechanism. The settled
sludge being collected in the side by sludge thickener section re-circulated back to the
aeration tank.
The clarified effluent will be disinfected and finally passed through the Pressure sand
filter which shall take care of micron suspension present in the clarified outlet. The final
discharge shall meet the standard norms set by the State Pollution control Board. The
treated waste water can be reused for flushing purpose, plantation / horticulture within
the complex and the surplus waste water will be discharged in the public sewer. The
sludge can be used as bio-fertilizer.
PROCESS UNITS
1.
Screen
2.
Oil & Grease Trap
3.
Collection-cum- Septic tank
4.
SAFF Reactor
5.
Diffuser System
6.
Secondary Sedimentation Tank
7.
Clear Water Tank
8.
Dual Media Filter
9.
Sludge Drying Beds
10.
Chlorinator
SAFF REACTOR
m3/d
mg/lt.
%
mg/lt.
Kg/d
Kg/M3/d
M3
M
M2
MxM
600
300
85
22.5
150
1.5
91
3.0
30.56
6.0X6.0
Actual Plan Area
Actual media volume
Air Requirement
M2
M3
M3/Kg BOD Removed
36
27
50
Air Requirement
M3/d
CFM
Nos.
CFM
6875
168.703
36
4.686
Design Flow
BOD Load in
Desired BOD Reduction
BOD Out
BOD Load
BOD Loading Rate
Media Volume Required
Media Height
Plan Area
Actual Plan Dim
(to
compartmented)
No. of Diffusers
CFM Per Diffuser
* Munters FB 10.27
SECONDARY SEDIMENTATION TANK
Type
Flow rate
Non Mechanized with Tube dek
m /hr.
25.0
SLR
Plan area
Tube settler Plan dim.
Actual tube plan area
Overall Tank dim.
Tube Height
Tube Quantity
Inlet Chamber
Space above Tube
Space below Tube
Total SWD
Bottom Slope
** Munters’ FS-41.50
m/hr.
m2
mxm
m2
mxm
m
m3
m
m
m
m
Deg.
3
2.5
9.167
3.028 x 3.028
3.1 x 3.0
3.5 x 3.0 (or Compartmented)
0.75
9.0**
0.40
0.40
0.60
1.75
45
be
TUBE SETTLER –TECHNICAL DETAILS
Tube settler media is a rigid PVC tube of hexagonal cross section and are inclined at
60. The cross section area is 52.80 sq. cm. perimeters are 35.2 cm. and the hydraulic
radius is 1.50 cm. The specific surface area under 60 is 11m2/m3 i.e. the horizontal
projection of the surface of 1 m3 of FS 41.50 inclined with 60 is 11m2. Tube settler
media is basically used in the clarifiers/ setting tanks to separate suspended matters
which high specific weight than that of the liquids. For matter with low or equal specific
weight than that of the liquids they can be separated by adding flocculent, which create
flocks of higher density and subsequently be settled using tube settlers. The particle size
of the flocks or suspended matters in the setting basins using tube settler should not be
grater than 15 cm size as this cause clogging.
These tube settlers perform the same way as the mechanical devices like clarifiers and
belt scrappers.
DUAL MEDIA PRESURE FILTER (2 nos.)
Size and specification:
Working
:
Down-Flow
Maximum Flow rate (m3/hr)
:
25
Minimum Flow rate (m3/hr)
:
15
Maximum Working Pressure (kg/cm2)
:
3
Minimum Working Pressure (kg/cm2)
:
1.5
Type
:
Vertical cylindrical
Make
:
Mild Steel
Testing Pressure (kg/cm2)
:
3
Working Dia (mm)
:
1400
Height on straight (mm)
:
2500
Filtration Media
Type
Bed depth (mm)
:
:
Graded sand with under bed
1750
Type
Flow monitoring unit
Quantity
:
:
:
Manual
Butterfly valve
One No.
Frontal Pipe line
Make
Quantity
:
:
MS
One Lot
Operation System
EQUIPMENTS/UNITS
BAR SCREEN/SCREEN CHAMBER
No. of units
: one
Spacing of bars
Screen Chamber m x m x m
MOC
: 10 mm c/c.
:2x1x1
: RCC/RBC
OIL & GREASE TRAP
No. of units
Screen Chamber m x m x m
MOC
: one
: 3 x 2.0 x 1.5
: RCC/RBC
COLLECTION TANK
No. of units
Capacity, m3
Retention period, hrs.
Size m x m x m
MOC
: one
: 100
: 4
: 6 x 5 x 3.5
: RCC
SAFF SYSTEM
No. of units
Capacity, m3 /day
HRT, hrs.
Size m x m x m
MOC
: one
: 600
: 4.0
: 6.0 x 6.0 x 4.2 compartmented as
6 x 3 x 4.2 (2 Nos.)
: RCC
AIR DIFFUSION SYSTEM
Air requirement, cfm
Type of air system
No. of Diffusers
Type of diffusers
Capacity of diffusers, cfm
: 170
: Blower/Twin lobe
: 36
: Tubular/non/clog
: 4.7
SECONDARY SEDIMENTATION TANK
No. of units
: one
Type
: Tubedek media filled
Capacity,m3/hr
: 21
Size m x m x m
: 3.5x3.5x1.75 SWD with 45o hopper
bottom.
MOC
: MS internally coated/ RCC
CLEAR WATER TANK
No. of units
Capacity, m3
Retention period, hrs.
Size m x m x m
MOC
: one
: 45
: 2.1
: 6 x 3 x 2.5
: RCC
SLUDGE DRYING BEDS
No. of units
Capacity, m2 each
Size m x m
MOC
: 10
:9
: 3.0 x3.0 x1.0
: RCC/RBC