Religious effluent:

Wastage of food in the name of religion.

Every industry has waste discharged as effluent. Religious industry is no different. Here is an example of wastage of food laid out on road as part of some religious ritual:

The food is not thrown but laid out on the crossing as part of some ritual rather dogma. It must be in so much quantity that now even dog lying asleep nearby is not interested. 

What a waste?