Guidelines for the Design of Small Sewage Treatment Plants
APPENDIX 2
FLOW AND LOAD FOR DIFFERENT TYPES OF DEVELOPMENT
|
| |
| 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 |
|
| |
|
* 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.
|
|
    |