Molybdenum is a concern if a sewage treatment plant receives an excess as it ends up in the bio solids. These solids are often used as a fertiliser or compost.
Human toxicity data for molybdenum is currently unavailable. However animal studies have shown molybdenum to be toxic and that chronic ingestion can damage the lungs, kidneys and liver.
Molybdenum Removal From Wastewater
Molybdenum is one of the more difficult chemical elements to remove from waste water.
If the molybdenum is soluble (filtration with 10 micron filter will determine this) precipitation can occur at pH~4 with ferric sulphate or ferric chloride. This can be aided by addition of lime to pH~6.5.
The problem is that at this pH all of the other heavy metals are in solution so the options to have a two stage treatment process and all the additional equipment so the ferric molybdate is removed prior to further pH correction and precipitation.
GPC Clear Solutions have come up with a proven alternative where a single precipitation step is required removing all the metals at pH6.5 by the use of Clearflo L1-R.
The molybdenum is removed by addition of Ferric chloride and heavy metals are removed as insoluble precipitant by reacting with Clearflo L1-R.
Please contact GPC Clear solutions for more details.