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.

 

 

Back to topdot_clear.gifBackTable of Content