Powering restaurant with kitchen grease

Very good idear! Let's see how it work.
Vegawatt focuses on the upside of grease, turning restaurants' waste oil into electricity and hot water.
After filtering a restaurant's used vegetable oil, the unit combusts the refined fuel in a diesel engine, feeding electricity and hot water straight into a restaurant's system. The units won't provide all the power and electricity that a business needs, but can significantly improve its carbon footprint and running costs, as a unit typically provides 10-25% of electricity requirements.
Strengths:

• Save on electricity and heat.
• Generate clean energy.
• Easy to use, no fuss, no muss.
• No more over lowing oil barrels.
• The reputation boost gleaned from going green.
• Businesses further benefit by not having to pay or arrange for used oil to be removed.

Weaknesses:

N/A!