The core practice of the grease trap is
Do it according to the national standard
“
Three grids and one partition, anti-seepage and anti-short flow
”
Mainstream points
civil brickwork
with
Finished product installation
The process and key parameters are as follows, and the construction can be directly compared.
Comparison of mainstream practices
Type of practice | applicable scenario | core process | Compliance points |
civil brickwork | outdoor | site selection | according to |
Finished product installation | indoor | survey | meet |
通用施工步骤
1.
Site selection and survey
Close to the lowest point of kitchen drainage, away from open flames and residents' sensitive areas; reserved
≥0.5m
Maintenance channel, indoor priority finished equipment.
2.
Foundation and impermeability
Foundation pit excavation is larger than pool body
0.3–0.5m
；垫层 10–15cm 级配砂石夯实；池体内壁做防水砂浆 / 环氧沥青 / HDPE 膜，杜绝渗漏。
3.
Pool construction (brickwork)
use
MU10
实心砖、M7.5 砂浆砌筑，壁厚≥24cm；分三格（进水→隔油→出水），设挡油板 / 过水孔；内部 1:2.5 水泥砂浆抹面 2–3cm。
4.
Pool body assembly (finished product)
Polishing the weld after welding of stainless steel pool body; plastic
/
玻璃钢池体用专用胶密封；吊装就位后调平，水平误差≤2mm/m。
5.
Key Accessories Installation
￮
Water inlet: set grille (aperture)
≤10mm
), pipe diameter
≥DN100
, slope
1%–2%
Slope into the pool;
￮
Outlet: set water level weir, pipe bottom from pool bottom
≥0.6m
Higher than the water inlet
10–15cm
, install check valve;
￮
Oil collection: leave an oil collection tank at the top, and arrange YouTube.
/
撇油装置，容积≥有效容积 25%；
￮
Mud discharge: mud bucket and ball valve at the bottom of the pool, pipe diameter
≥DN200
Hydrostatic pressure
≥1.5m
。
6.
Backfill and capping
Layered backfill sand and gravel around (
≤30cm /
Floor), construction waste is prohibited; pool roof cover
C20
Concrete protective layer; cast iron
/
Stainless steel manhole cover seal, reserved maintenance port.
7.
Commissioning and acceptance
Water injection leak test, no leakage; simulated wastewater test, oil removal rate
≥90%
Check the flow rate
≤0.005m/s
Dwell time
≥30min
。
⚠️
Core pit avoidance points
•
anti-short flow
: Three-grid design to extend the residence time and avoid water rushing directly to the outlet.
•
anti-leakage
The anti-seepage of the pond wall must be in place, otherwise the soil will be polluted and the environmental protection will not meet the standards.
•
anti-clogging
Grid aperture
≤10mm
Regularly clean up debris.
•
antifreeze insulation
: Add outside the north pool wall
50mm
岩棉，不锈钢池装伴热带。
关键参数速查
•
Effective water depth:
1.2–1.5m
；池长宽比≥4:1；单格宽≥0.6m；
•
Duration of stay: catering wastewater
≥30min
(Small take
45min
）；
•
Flow rate:
≤0.005m/s
Surface load
≤0.08m³/(m²
・
h)
；
•
Material: Stainless steel preferred
304（镍≥8%），砖砌需防水防渗。
