0 water that is not clean because it has already been used in homes, businesses, factories, etc.:
1 water that is not clean because it has already been used in homes, businesses, factories, etc.:
A secondary stage sewerage treatment plant treats all waste water from the station.
However, in the nutrient-rich waste water, biofilms form rapidly on the heat exchanger and significantly reduce its efficiency.
There was no detailed information about how long the subjects had been exposed to waste water.
If the sulfide production exceeds its potential sinks, sulfide will enter the flowing waste water.
Similarly, the consumption of washing powder leads to waste water.
In addition, hydrogen sulfide can be released from the waste water, potentially resulting in a hydrogen sulfide build-up in the sewer atmosphere.
The risk is potentially higher for workers who use untreated waste water and their family members than for those who only eat uncooked crops.
The treatment plant serves approximately 22 000 person-equivalents and the waste water is without industrial inputs.
