This is good news. The white mould is actually a fungi and shows that the food waste is fermenting rather than putrefying.
The best way to deal with this is to throw the whole batch away
Obviously these must have entered on your food waste in some form so the first step is to add your food waste more regularly to avoid this issue.
If your kit begins to smell add a good handful more of Bokashi Bran as it is likely the waste is putrifying rather than fermenting.
This liquid is a very potent fertiliser or drain cleaner and it can have a really strong smell so the best way to avoid this is to drain it regularly and use it.
Our composting worms are mixture of species (mainly reds and dendras) selected for their composting ability
The Urbalive Worm Composter is a home wormery kit that can be used indoors or outdoors for composting kitchen waste with the red worms. The perfect wormery for households, classrooms or offices.