Page 66 - GRIHA Manual Volume IV - Introduction to National Rating System
P. 66
Building planning and construction 57
Table 20.1 Characteristics of wastewater before and after treatment
Parameter Before treatment After treatment
Dissolved oxygen (mg/litre)
Biological oxygen demand (mg/litre)
Total coliform bacteria (MPN/100 ml)
Total dissolved solids (mg/litre)
Chloride as chlorine (mg/litre)
Colour
Boron (mg/litre)
Sulphates (mg/litre)
pH
Arsenic (mg/litre)
Fluorides (mg/litre)
Iron (mg/litre)
Copper (mg/litre)
Lead (mg/litre)
Sulphides
Oil and grease
TSS
COD
Total residual chlorine
Table 20.2 Annual testing plan and frequency
Date Volume of sample Sample collection Test laboratory
(ml) site name
Inlet Outlet Other
20.3 Appraisal (maximum points – 2)
20.3.1 Treated water should meet the disposal/reuse application standards (2 points).
Non-Applicability condition: If wastewater generation on site is less than 10 kL/day.
Packaged plants, which are commonly used in commercial and institutional buildings (sites with space constraints), are currently
available in the market in different capacities. The minimum size available is for 10 kL/day under this category of treatment plants.
The investments (capital and operational) associated with treatment plants below this capacity are not inancially feasible. Hence,
a non-applicability condition applies here that if total wastewater generation from a site is less than 10 KL/day, this criterion is not
applicable.
Methodology
Steps
# Calculate the expected wastewater generation per day (assumed to be 85% of the total water
consumption).
# Calculate the expected greywater generation per day (70% of the wastewater generated).
# Check the feasibility of treating wastewater if the quantity is greater than 10 kL/day.
# Selection of appropriate technology based on reuse application, land requirement, capital costs,
operation and maintenance costs, and so on.
Table 20.1 Characteristics of wastewater before and after treatment
Parameter Before treatment After treatment
Dissolved oxygen (mg/litre)
Biological oxygen demand (mg/litre)
Total coliform bacteria (MPN/100 ml)
Total dissolved solids (mg/litre)
Chloride as chlorine (mg/litre)
Colour
Boron (mg/litre)
Sulphates (mg/litre)
pH
Arsenic (mg/litre)
Fluorides (mg/litre)
Iron (mg/litre)
Copper (mg/litre)
Lead (mg/litre)
Sulphides
Oil and grease
TSS
COD
Total residual chlorine
Table 20.2 Annual testing plan and frequency
Date Volume of sample Sample collection Test laboratory
(ml) site name
Inlet Outlet Other
20.3 Appraisal (maximum points – 2)
20.3.1 Treated water should meet the disposal/reuse application standards (2 points).
Non-Applicability condition: If wastewater generation on site is less than 10 kL/day.
Packaged plants, which are commonly used in commercial and institutional buildings (sites with space constraints), are currently
available in the market in different capacities. The minimum size available is for 10 kL/day under this category of treatment plants.
The investments (capital and operational) associated with treatment plants below this capacity are not inancially feasible. Hence,
a non-applicability condition applies here that if total wastewater generation from a site is less than 10 KL/day, this criterion is not
applicable.
Methodology
Steps
# Calculate the expected wastewater generation per day (assumed to be 85% of the total water
consumption).
# Calculate the expected greywater generation per day (70% of the wastewater generated).
# Check the feasibility of treating wastewater if the quantity is greater than 10 kL/day.
# Selection of appropriate technology based on reuse application, land requirement, capital costs,
operation and maintenance costs, and so on.
