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It explains design options with built-in or built-on sludge traps, how grease separates by density and clumping, and notes regular cleaning and emptying. It also provides compliance information for NEN-EN 1825 and guidance for sizing via capacity calculation using sludge volume requirements and cleaning-agent factor.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/grease-trap-en1825-instruction-and-capacity-calculation/648411/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/grease-trap-en1825-instruction-and-capacity-calculation/648411.png","ImageObject",300,407,{"name":92,"@type":93},"Helloiii","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-24","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"When is a grease trap required?","Question",{"text":112,"@type":113},"Installation is recommended when water treatment happens too far from the kitchen to prevent pipe blockages, and it is always required for hotel and catering establishments, companies, schools, and comparable food-related operations.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does a grease trap separate grease from wastewater?",{"text":117,"@type":113},"Greasy water enters the tank through a baffle, and greases separate because they have a lower density than water and they clump when they contact colder water in the trap.",{"name":119,"@type":110,"acceptedAnswer":120},"What standard requirements apply to sludge volume and cleaning agents?",{"text":121,"@type":113},"The sludge trap content must be at least 100 litres per litre second, and the standard applies a factor of x 1.3 for the use of cleaning agents, which must be applied at all times.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},648411,1792856084,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":36},5909897196768,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Grease trap  \nEN1825  \nGrease trap  \nContents  \n• 03 A grease trap and how it works  \n• 04 Grease trap conform NEN-EN 1825  \n• 06 Capacity calculation  \n• 07 Single sink trap, round  \n• 08 Grease trap 2l/sec, rectangular  \n• 09 Grease trap 2l/sec, round  \n• 10 Grease trap 4l/sec, rectangular  \n• 11 Grease trap 4l/sec, round  \n• 12 Grease trap 7l/sec, rectangular  \n• 13 Grease trap 7l/sec, round  \n• 14 Sizes and weights  \n• 15 Bringing into in use and emptying  \n2  \nGrease trap  \nA grease trap and how it works  \nCHARACTERISTICS  \nA grease trap is an appliance to remove grease (vegetable and animal greases and oils) from waste water. The installation of a grease trap can be required in the following cases:  \n• With homes: If water treatment takes place, this is recommended if water treatment happens too far from the kitchen to prevent pipe blockages.  \n• At hotel and catering establishments, companies, schools, butchers, domestic caterers, etc.: A grease trap is always required in these cases.  \nThe volume of the grease trap depends on the discharged flow rate, the temperature of the water, the use of cleaning products and the waste load. Please contact our technical department to identify the appropriate type.  \nThere are two types of grease trap with sludge trap:  \n• Built-in sludge trap: Here a partition is welded in the tank so the first compartment serves as a sludge trap. The advantage here is that installation is simpler and quicker than with a separate sludge trap.  \n• Built-on sludge trap: Here a tank is installed before the grease trap.  \nDYKA will be happy to assist you in determining the correct capacity of the grease trap by including a capacity calculation, see page 6.  \nOPERATION  \nThe greasy water originating from the kitchen and/or dishwasher arrives in the tank through a baffle. The greases separate from the water for two reasons:  \n• The grease has a lower density than water (so it is lighter)  \n• The grease clots as soon as it arrives in the colder water in the trap  \nThe grease trap is constructed in such a way that the collected grease stays on the surface and practically no grease is discharged (this involves the condition that the grease trap is cleaned and emptied at regular intervals, seethe user instructions) .  \nGrease trap in the initial phase (clean water)  \nGrease trap saturated (grease layer floats)  \n3  \nGrease trap  \nGREASE TRAP  \nconform NEN-EN 1825  \nProvided with: QUALITY DECLARATION and CE MARK Suitable for the separation of animal and/or vegetable greases and/or oils  \nThe sludge trap content of grease traps must be least 100 litres per litre second.  \nExample:  \na 2 l/s grease trap has a minimum sludge volume of 200 litres  \na 4 l/s grease trap has a minimum sludge volume of 400 litres  \nThe standard uses a factor of x 1.3 for the use of cleaning agents. This must be applied at all times.  \nAll standard HDPE grease traps have been given the CE mark. The HDPE grease traps have successfully completed efficiency tests (PA mark) with the German LGA TÜVRheinland approval body. This means first class materials and accredited welders guarantee quality as well as efficiency.  \n4  \nGrease trap  \nApplicable at businesses and establishments such as:  \n• Restaurants, hotels, pubs and cafeterias  \n• Nursing homes, rest homes and hospitals  \n• Butchers, slaughterhouses and meat product producers  \n• Fishmongers and fish-processing companies  \n• Sports, local authority and works canteens  \nThe big advantages of our grease traps:  \n• Robust construction  \n• High quality, so long-lasting  \n• Low installation cost  \n• High efficiency conform NEN-EN 1825  \n• Also available for heavy traffic loads  \n• Simple cleaning and maintenance  \n• Fast delivery times, normally available from stock  \nThe grease traps are available in the following materials:  \n• High quality High Density Poly Ethylene (standard)  \n• Prefab reinforced B45 concrete provided with a grease-resistant epoxy coating (on request)  \n• Prefab rein","cbCaiiFfFYhH4Yib","https://ap.wps.com/l/cbCaiiFfFYhH4Yib","pdf",1309517,16,"English","# A grease trap and how it works\n## Characteristics\n## Operation\n## Grease trap conform NEN-EN 1825\n## Capacity calculation\n# Brought into in use and emptying","[{\"question\":\"When is a grease trap required?\",\"answer\":\"Installation is recommended when water treatment happens too far from the kitchen to prevent pipe blockages, and it is always required for hotel and catering establishments, companies, schools, and comparable food-related operations.\"},{\"question\":\"How does a grease trap separate grease from wastewater?\",\"answer\":\"Greasy water enters the tank through a baffle, and greases separate because they have a lower density than water and they clump when they contact colder water in the trap.\"},{\"question\":\"What standard requirements apply to sludge volume and cleaning agents?\",\"answer\":\"The sludge trap content must be at least 100 litres per litre second, and the standard applies a factor of x 1.3 for the use of cleaning agents, which must be applied at all times.\"}]","Grease trap - EN1825 - Instruction and capacity calculation | PDF",1792793398]