Guidelines for the Design of Small Sewage Treatment Plants
APPENDIX 2
FLOW AND LOAD FOR DIFFERENT TYPES OF DEVELOPMENT
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|
FLOW |
Type of development* |
Recommended design flow rate*
(L/head/day)
|
Residential R1 |
190 |
Residential R2 |
270 |
Residential R3 |
370 |
Residential R4 |
370 |
Modern Village Housing |
270 |
Traditional Type Village Housing |
150 |
Temporary Housing Area (THA) |
150 |
Schools (Not including canteen) |
40 (students, staff etc.) |
Offices (Not including canteen) |
80 / employee |
Services (shops etc.) |
280 / employee |
Restaurants/canteens |
1,580 / employee |
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|
* Notes:
(1) Types of development should made reference to the Hong Kong Planning Standards & Guidelines of the Planning Department.
(2) Reference is made to the Guidelines for Estimating Sewage Flows for Sewage Infrastructure Planning (Version 1.0) on the EPD homepage
LOAD |
Type of development |
Recommended BOD load (g/head/day) |
Recommended SS load(g/head/day) |
Residential, all types |
55 |
55 |
School (not including canteen) |
23 |
23 |
Office (not including canteen) |
23 |
23 |
Factories (not including industrial and canteen wastes) |
23 |
23 |
Services |
to be pro-rata to equivalent residential population |
Restaurants/Canteens |
300 g/m2 kitchen area/d |
300 g/m2 kitchen area/d |
The use of garbage grinders may increase the per capita contribution of BOD by about 30% and of SS by 60%, and such increases should be taken into account in the design of the STP.
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