If the food is so hard then it cannot pass through the plumbing then you will require a waste disposal unit which can be placed under the sink. Using this disposal unit it is possible to keep the waste and smell away from the kitchen. Whatever the case is the unit has to be properly maintained in order to avoid stinky smell from the kitchen. The hard objects like crabs, hard shell, popcorn kernel and a lot more should not be kept above the unit. The list of object will be mentioned in the information manual of every product.
It is also important to note that the fibrous and the scratchy items have to be kept away from the waste disposal unit since they can also harm the unit. Potato peel, onion skin, egg shell, coffee grounds and much more has to be kept away from them. If the thing that cannot be easily turned into compost should be avoided by the unit and also they should not be dumped into environment since it will not be decomposed and will cause damage in the future. So it is good to keep such things away from them.
Use only cold water to push all the waste in to the waste disposal unit and also the water flow has to be regulated for 30 to 60 seconds in order to make it clean. If the food item is large then it has to be cut in to pieces and then dumped in to the disposer. The use of cold water can also reduce the problem of overheating as well. Once the disposal is complete use the paper towel to clean the disposal unit in order to keep it clean and make sure the unit is off.