Choice No.1: Do I need a grease trap at all?
Virtually all commercial and some domestic kitchens will benefit from installing an efficient grease trap. It will prevent the blockage of the kitchen drains which is caused almost daily in some kitchens by grease, fat and cooking oils cooling and sticking to the drain pipe walls. Once the grease has been separated and trapped, there is time for it to be treated or alternatively, collected and removed.
Those kitchens which have literally no space for a grease trap either inside or outside, below ground should install a liquid dosing pump to inject bugfluid into the drain pipes every night after the kitchen has closed. This will create a biomass culture inside the pipes but is a more expensive option long-term.
See: Automatic Dosing Pump

Installation above-ground inside the kitchen is a cheaper and easier way to install but can be a disadvantage when maintenance is required.
See: Kitchen Grease traps

Underground installation is the preferred option wherever space permits and is the only option for larger units.

Choice No.3: Biomass grease treatment systems generally allow smaller users to almost eliminate maintenance. Larger users may need a manually emptied or tanker emptied Lamina Filtertrap but can often reduce the maintenance requirement by using  a biomass creation system in addition.

Biomass Grease treatment    Or   Manual emptying   Or   Suction Tanker Emptying

A biomass culture is created inside the greasetrap. The fats oils and greases are consumed by the biomass converting it into harmless water and CO2. The biomass culture needs a boost every 4 months. This is normally achieved by the simple change of a 'bugsock.' but alternatively can be boosted by the liquid dosing pump injecting bugfluid into the grease trap every night.
See: Underground Biomass Grease Traps

Manually emptied Lamina Filtertraps have a hoist to lift the collection tray above ground where the collected grease and sediment is drained into collection bags for disposal.
See: Lamina Filtertraps

Tanker emptied Lamina Filtertraps are recommended for large catering establishments and food processing factories. Sufficient capacity is built into the units to allow very infrequent emptying so that the tanker need only call every few months.
See: Tanker-Emptied Filtertraps