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Grease Interceptor / Oil Interceptor


LAKASA Biomatic Grease Interceptor

Need for Good Grease Interceptor System
Direct discharge of greasy and oily wastewater from restaurants, fast food stores, centralized food courts in commercial and institutional buildings as well as traditional individual shops into the drain lines has significantly increase pollution to server plants, rivers, lakes and other waterways. The increasing difficulties in dealing with these problems are in the form of frequent pipeline and manhole blockages, obnoxious and rancid odors. This calls for a compulsory adoption of effective waste effluent pre-treatment.
LAKASA Biomatic Grease Interceptor is designed to provide an effective, hygienic and environmental friendly solution to grease contamination. LAKASA Biomatic Grease Interceptor is recommended for use in kitchens, restaurants, institutions, and all types of food processing areas, with wastewater containing grease, fats and oil (FOG) and solid starch. LAKASA Biomatic Grease Interceptor is completed with two individual chambers to take care both the solid waste and starch, as well as grease and oil which are frequently exist in kitchen wastewater. The solid waste and starch is filtered out effectively from the sediment trap (first chamber), while the grease and oil is intercepted from the second chamber. The interceptor can be used for manual removal of oil and grease or used in conjunction with LAKASA Biomatic Liquid Enzyme for waste digestion.
Specification of LAKASA Grease Interceptor
The unit is completed with two chambers and with two separate interceptor covers. The first chamber comes with a perforated stainless steel bucket and is able to effectively filter away incoming solid waste and starch. The interceptor cover for first chamber can be easily opened with hinges support for easy maintenance. The second chamber is completed with checker plate aluminium cover; a proper design removable baffle assembly which can effectively control flow velocity and turbulence of incoming wastewater; enzyme dosing connection and deep seal integral trap with rodding access.

How LAKASA Grease Interceptor Functions
Wastewater from kitchen sink, dishwasher that contains air, grease and food particles are flushed and enters the inlet of interceptor at high velocity. Food particles will be trapped and filtered in the stainless steel perforated basket, leaving only greasy water to continue its journey to the next chamber. At the inlet to second chamber, wastewater is immediately directed downward by the main deflecting baffles, at the same time allowing trapped air bubbles to rise to the surface. The baffles will effectively reduce the velocity and turbulence of the incoming liquid. The turbulence of the liquid flow is further reduced when the wastewater passes through the remaining baffles. These baffles are arranged in unique positions to allow effective and efficient separation of grease, fats, and oils from wastewater and rise above the normal established water line of the interceptor.
Sizing & Selection
(i) Check the flowrate of wastewater from each fixture.
(ii) Calculate total flowrate from all the fixtures connected to one particular grease interceptor.
(iii) Identify and assume the simultaneous discharge diversity factor for all the fixtures.
(iv) Multiply the total flowrate with the assumed diversity factor to obtain flowrate during peak activity hour.
(v) Refer to the table for sizes available and select proper interceptor of equivalent or next higher rate.
Selection Tables: Fixture Size

Sink Size
Interior Measurements
# Bowls Capacity
in Gallons
Water Flowrate
12" x 18" x 6" 1 4.2 7
14" x 16" x 8" 1 5.8 7
18" x 20" x 8" 1 9.4 10
16" x 18" x 8" 2 15.0 15
18" x 20" x 8" 2 18.7 20
20" x 30" x 8" 1 15.5 20
20" x 24" x 12" 1 18.7 20
20" x 22" x 8" 2 23.0 25
20" x 22" x 12" 2 34.0 35
24" x 24" x 12" 2 44.9 50
In Gallons
15-20 15
20-30 20
30-50 25
50-70 35
70-100 100


No. of fixtures Fixture Value (GPM) Total Value (GPM) Diversity Factor Flow Rating (GPM)
Floor drains 2 12 24
Dish washing sink (18"x20"x8") 2 20 40
Hand washing sink (14"x16"x8") 2 10 20
Dishwasher (50 gallon capacity) 1 35 35
Total 119 75% 89 GPM

** Diversity factor only applicable to Low activity (cooking and washing) environment. Water Retention Time of more than 30 minutes will generally achieve >99.9% of Grease removal percentage.
The model recommended is LK2100 (100 GPM) OR LK2200 (200 GPM) for busy environment.

Operation and Maintenance Guide
1. Sediment trap chamber is to be cleaned up on daily basis. However, the frequency of cleaning can be once a few days if the incoming volume is low.
2. Grease trap chamber is designed to intercept incoming grease and oil. The grease and oil which is trapped in this chamber can be cleaned either :
• by manual scoop (once a week). In this case, Grease Interceptor shall be maintained in efficient operating condition by periodic removal of the accumulated grease. No such collected grease shall be introduced into any drainage piping, or public or private sewer.
• by biomatic liquid enzyme, which actually converts grease into water and carbon dioxide. If a thickening of the contents is noted, with a distinct caking effect across the surface, or an offensive, pungent odour is emitted, then gradually increase the suggested dosage rate to compensate. If the contents appear to remain in a minimal semi-liquid state with little or no odour, this indicates successful degradation of the grease. Whenever tank is cleaned, the initial dosing procedure must be repeated.
3. With the introduction of biomatic enzyme, periodic cleaning for grease is about once every 6 months. For manual cleaning (without using biomatic enzyme), cleaning for grease is about once a week. However, more frequent cleaning is required when there are more activities and/or when incoming grease content is high.
4. Additional aeration system is suggested for larger size grease interceptor. The aeration pump is pre-set to run at the right timing and duration to achieve optimum performance.



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