Low Tech waste water filtration solution wanted for reusable serve-ware charity

[Jo30]

Hello everyone
I work for a new charity based in the UK, to replace disposable food and drinks serve-ware in the live events sector, with safer reusables. Not plastics.

We are designing a professional mobile dishwashing trailer unit and seeking potential solutions to reuse the waste water from the dishwasher, for pre rinsing the food from our food serve-ware before they enter the dishwasher.

On an event site, the washing systems will be managed by trained staff, but we would like to use a system that can also be easily understood by volunteers. Sustainability, safety and cost are our two priorities in that order.

We are not trying to reuse the water for consumption. Just for rinsing food from dirty plates before they go through our dishwasher.
Is there anything we can use as a filter that will remove most of the grease and dirt, and be easy to replace regularly as a filter material? preferably made from a natural, compostable material such as fibre matting, cotton, hemp, straw etc...

We are thinking of perhaps a stainless steel tray with a simple layer of material and a catchment funnel underneath with a pump?

Students who wish to help us design the system will be fully credited for any ideas we adopt and we will be applying for grants to help with substantial work towards achieving this system. We are in the early stages of registration as a charity and re currently a non profit registered in the uk

Wash Ability CIC

https://wash-hubs.org