A dishwasher can cause a bad smell at the kitchen sink.
most of the time it is either the disposal it self, or drain tube is full of food by material, between disposal and baffle tee, or if have or had leaks could be coming from under cabinet, mold and bactieria growing
it probably needs to be cleaned.
In your kitchen what is depositing in to the drain? If u hav the sink , dishwasher and washing machine u are more likely getting a smell that is a simple job of usual products to clean the dishwasher of the smell if its nt that its the job if grounds men that have to fix the outside drainage
The water pump.
it's clogged...
It is usually hooked up to your kitchen sink p-trap or garburator under the sink, which is vented. This is the only vent you need for drainage.
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Sewage smell in toiletbathroom coming from the outside drainage pipe work via the toliet and the sink and bath waste pipes even though there is a stench pipe just outside.?
Kitchen sink and washer use same drain line. Drain line clogged causing backup of drainage from washer into kitchen sink. Have drain line unclogged to take care of problem. If drain line not clogged, check for proper venting of drain lines.
If indeed it is IN your sink, simply run lots of hot soapy water through it.
All plumbing drainage horizontally is 1/8th of an inch per foot.
It would be my suggestion that you need to have the sewer "snaked" out as there is an apparent obstruction in the run from the bath area to your septic tank or sewer line and the the kitchen is "up-stream" from that bathroom, or, perhaps the shower is on the back side of your kitchen waste and the obstruction is associated with the showers drain and waste run...i.e., a hair clog, etc, is building up and combining with the waste material from the kitchen. Perhaps there is a clean-out plug under the kitchen sink which you can run a small "snake" through.
How big is the kitchen sink
It depends on sink. Kitchen sink is a very generic term, not all kitchen sinks have the same size,