Businesses must separate their hazardous waste at all times. Hazardous waste is waste which is dangerous to humans, animals or the environment. You can find information on the classisfication of waste in the European List of Waste.
The Waste Management Department Information Desk (RWS Environment) can tell you whether you are obliged to separate your non-hazardous waste too. However, if possible you should seprate all waste in your company.
Recycling and waste management are priority topics for the EU, and the coming years will see a shift towards extended producer responsibility and recycling of waste. You can find more information on these ambitions on the Rijkswaterstaat Environment website.