Example Calculation of Meals Per Day for Biological Grease Traps
For the convenience of sizing, 1 meal per day = 1 course of food. For example, an hotel providing three meal sittings on a daily basis for its guests – breakfast (1 course), lunch (3 courses) and dinner (3 courses) yields a maximum total number of courses for each guest of 7 ‘meals per day’. If the hotel has a total number of 40 double rooms, then the maximum number of meals per day that could be produced is given by: 7 x 40 x 2 = 560mpd.
Sitting |
Course 1 |
Course 2 |
Course 3 |
Course 4 |
A Total courses |
B No. of guests possible |
C % of guests expected |
Meals Per Day |
Breakfast |
1 |
N/A |
N/A |
N/A |
1 |
40 |
70% |
28 |
Lunch |
1 |
1 |
1 |
N/A |
3 |
40 |
40% |
48 |
Tea |
1 |
N/A |
N/A |
N/A |
1 |
40 |
20% |
8 |
Dinner |
1 |
1 |
1 |
1 |
4 |
40 |
100% |
160 |
Meals Per Day |
|
|
|
|
|
|
244 |
Below Ground BGP Features & Benefits

1) Solid chequer plate cover FACTA Load Class A. 
2) Recessed cover FACTA Load Class B.
3) Solid chequer plate cover FACTA Load Class B.
4) Recessed cover FACTA Load Class D.
5) Slotted screw four point locking cover for convenient removal.
6) Sealed system on all covers.
7) Four point lifting key.
8) Robust, fully welded hot dip galvanised finish.
9) 300mm raising piece option easily cut on-site to length.
10) Robust, fully welded lightweight and corrosion resistant polypropylene body.
11) Six sizes up to 15 l/s or 1000 meals per day capacity.
12) Outlet has inbuilt access for jetting or rodding.
13) Lightweight polypropylene sediment basket with handle and location guide for easy maintenance.
14) Offset access point ensures convenient removal of sediment basket.
15) Conventional connections to Ø110mm and Ø160mm pipes with female in, male out on BGP 50-700. The BGP 1000 incorporates Ø200mm male connector.
BGP Technical Details & Dimension
Model |
Part No. |
Inlet/Outlet connection mm |
A Body Height |
B Base to Inlet Invert |
C Body Diameter |
Dry Weight |
Meals Per Day |
Flow Rate l/s |
BGP50 |
402617 |
110 |
458 |
298 |
650 |
15 |
0 - 50 |
2 |
BGP150 |
402618 |
110 |
618 |
453 |
745 |
23 |
50 - 150 |
4 |
BGP250 |
402619 |
110 |
580 |
415 |
850 |
30 |
150 - 250 |
6 |
BGP450 |
402620 |
160 |
820 |
605 |
850 |
35 |
250 - 450 |
8 |
BGP700 |
402621 |
160 |
920 |
705 |
850 |
38 |
450 - 700 |
10 |
BGP1000 |
402622 |
200 |
940 |
670 |
1050 |
65 |
700 - 1000 |
15 |
The ECO-FPI below ground separators are currently not available for purchase online,
please phone our technical support team for further details and prices on 01386 832205