Kitchen sink discharges into "open" drain?

[mjsx]

Just moved into a new house, and my kitchen sink discharges into an "open" drain—have never seen this arrangement before! Is it possible to plumb the kitchen waste into the drain directly? (Don't want to make a food particles for critters to eat.) Is this a lot of work? The gutters also discharge into the same drain, as did the boiler overflow (now removed).

 

[saveasteading]

The tidy solution would be  a new inspection chamber. This would be below ground with a cover. Just downstream of the rainwater which can have its own entry. 

[Onoff]

43 minutes ago, mjsx said:

critters

 

They'll likely be getting in through those old air bricks! A mouse can get through a pencil sized hole.