It simply can prevented.
First the Belgium revolution was NOT a revolution and NOT an uprising.
It was nothing more than a conspiracy of French agitators who lived in Belgium, fled form France, who were inspired by the French July revolution.
Can this be prevented.
Yes, King William ! should not anger the Chatolic Clergy by nationalising the schools for Priest. Thsi will prevent the coalition of Chatholic clergy and the Liberals.
This will isolate the French agitators.
If it riots will occure as OTL and not unlikly, it can be stopped easily, when Prince Frederik entered Brussels at 23 September 1830 with an army of 12000 troops.
In OTL this army had to retreat in to the Royla Park or the Warande due to heavy fire from houses and building.
Prince Frederik second in command ( a veteran of the Napolenontic wars, a general which name I forgot) advised to use artilery and bomb the lower city and Marrolles, in order to clear the way to the crucial city gates.
Prince frederick refused, fearing the civilian casulties and decided to retreat the army out of the city during the night. This fatal desicion inspired the rioters and proved the civil guard of Brussles patricians that they can not count on the King and have to take maters in their own hand.
In short, there is no need to split the former Austrian Netherlands like the Taylerant plan or other fancy ful division plans.
Simple this it made up due to, at that time, non exsisting language issues or in case of Taylerant greater France dreams. The language issue is created after Belgian independence, by ruling out the Dutch language as offical language and even oppressing it.