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With reference to the observations raised during scrutiny of the application submitted by M/s Eastview Village, Village Dhadda, Tehsil Bhogpur, District Jalandhar, it is respectfully submitted as under:
1. Regarding discrepancy in water consumption and wastewater generation
It is submitted that the figures mentioned in the online application form were inadvertently interchanged due to a typographical error. The correct details are as under:
o Total fresh water consumption: 55 KLD
o Domestic wastewater / sewage generation: 50 KLD
The above correct figures are already reflected in the feasibility report submitted for the proposed STP.
Further, the sewage generation of 50 KLD against water consumption of 55 KLD works out to about 91% of total water consumption, which is within reasonable engineering limits for a commercial project where the major portion of water is used for domestic/sanitary purposes.
Thus, wastewater generation is not higher than total water consumption. The entry made in the application form may kindly be read/corrected accordingly.
2. Regarding utilization of treated wastewater and mismatch in disposal arrangement
It is submitted that the treated wastewater from the proposed 50 KLD STP shall be reused within the project premises for the following purposes:
o flushing,
o green belt / plantation,
o floor washing, and
o parking area washing.
Further, a treated water storage tank has been provided in the STP design for temporary storage and regulated reuse of treated water. The feasibility report includes a treated water tank in the system design and states that treated water is intended for plantation/reuse after treatment
The purpose of storing treated water in the treated water tank is to ensure balanced reuse during different times of the day and for non-potable applications within the premises.
The variation between the application form and feasibility report is due to brief/condensed entries made in the online form. However, the actual proposed reuse arrangement is as clarified above.
3. Regarding seasonal variation in flushing water demand and basis of calculation
It is submitted that flushing demand does not materially vary season-wise, as it depends primarily upon occupancy/footfall and sanitary usage pattern rather than weather conditions. Any minor variation, if at all, may arise due to change in visitor load, but for design purposes the flushing demand has been considered on standard design norms.
The design basis adopted for calculation is as under:
o water demand and sewage generation have been assessed on the basis of standard planning/public health engineering practice for commercial buildings, considering expected occupancy and sanitary fixtures;
o domestic sewage generation has been considered as a reasonable fraction of total domestic water consumption after accounting for losses/uses not entering the sewerage stream;
o flushing water requirement has been taken as part of total non-potable reuse demand for the commercial complex.
In the present case, against total domestic water consumption of 55 KLD, sewage generation has been considered as 50 KLD, which is technically reasonable and consistent with standard engineering assumptions for domestic/commercial projects
4. Regarding non-utilization in green belt during monsoon season
It is submitted that during the monsoon season the irrigation requirement for green belt/plantation reduces substantially due to rainfall. Therefore, during such period, treated water shall be preferentially utilized for flushing, floor washing and parking washing, and the balance treated water shall be managed through storage and regulated reuse within the premises. The statement in the feasibility report that green belt utilization may not be required during monsoon was made only to indicate reduced irrigation demand during rainy season and not to suggest any inconsistency in disposal planning.
5. Regarding feasibility report not being in accordance with prescribed norms
It is respectfully submitted that the feasibility report has been prepared for a 50 KLD STP based on MBBR technology, with treatment units including equalization tank, grit settler, MBBR tank, tube settler, treated water tank and multi-grade filter
UPDATE FEASIBILITY REPORT 50 KL…
. The design calculations in the report have been based on hydraulic loading and retention parameters for the proposed 50 KLD sewage load. The report specifically mentions, among other things:
o flow considered: 50 m3/day, equivalent to 2.50 m3/hr at 20 hours operation,
o equalization tank detention and capacity basis,
o grit settler retention time,
o MBBR hydraulic retention time and BOD reduction basis,
o tube settler sizing and surface loading basis, and
o treated water tank and filter sizing parameters
However, to avoid any ambiguity, the project proponent is ready to submit a revised and corrected feasibility report incorporating a clearer water balance, end-use breakup of treated water, and explicit design basis references.
Design Basis / References Adopted for Calculations
Without prejudice to the above, the following design basis / reference framework has been adopted / is being adopted for the revised submission:
a. Water demand and sewage generation basis
Water demand and sewage generation have been estimated as per standard engineering practice followed for commercial building projects, taking into account occupancy, sanitary demand, flushing requirement and reuse potential.
b. Normative / technical references relied upon
• CPHEEO Manual on Sewerage and Sewage Treatment Systems for sewage generation, collection and treatment design basis.
• CPHEEO Manual on Water Supply and Treatment for domestic water demand and planning norms.
• Standard public health engineering norms generally adopted for commercial complexes / building projects for occupant-based water requirement and sewage generation estimates.
• Standard design criteria for MBBR-based STP systems, including hydraulic retention time, organic loading, settling and filtration stages, as adopted by the design consultant.
c. Basis for sewage generation
Domestic sewage generation has been considered as a practical percentage of total water consumption after excluding losses and consumptive uses, which in the present case works out to 50 KLD sewage generation from 55 KLD total water consumption.
d. Basis for flushing demand
Flushing requirement has been assessed on occupancy and sanitary fixture basis for a commercial complex and treated water from the STP has been proposed to meet this non-potable demand.
e. Basis for monsoon adjustment
During monsoon, green belt irrigation demand reduces due to rainfall; accordingly, the reuse pattern shifts more towards flushing and washing purposes, with temporary storage in treated water tank for regulated use.
In view of the above, it is requested that the above clarifications may kindly be accepted and the application may be considered further. The project proponent undertakes to submit the corrected online entries / revised feasibility report, if so required.
WIth Regards |
2026-03-06 15:35:56.446 |
