The Puri-based artist, known for his sculptures that send out social messages, chose to draw a sand work to highlight the issue of climate change at the championship.
Patnaik's sculpture of a mermaid pleading for human effort to save the oceans was declared the winner.
"Indian culture is diverse and I get my motivation from there. An artist should always be thoughtful, creativity just follows," he said.
Patnaik said that there were a lot of Indians present at the competition who cheered for him and after he won the competition President Pratibha Patil sent him a congratulatory message. He didn't expect that on returning back to India people will be so welcoming.
The 35-year-old now wants to meet Prime Minister Manmohan Singh and give him a picture of his sand art.
"I haven't received any reaction from Prime Minister Manmohan Singh or Cultural Ministry but I want to meet him and give him a picture of my sand sculpture. I have also contacted them but haven't received any answer yet," he added.
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On his award winning sculpture, Patnaik said, "I always try to send a social message through my art. The mermaid sand sculpture talks about climate change and through this I want to make people aware about the ongoing issues."
After winning the Denmark competition, Patnaik will next be taking part in Sofia sand art championship to be held in Bulgaria between June 15-21.