PITTSBURG, Kan. — SEK Recycling is turning 21 and celebrating with a party at The Pitt this Thursday. After more than two decades of keeping a significant amount of garbage out of the landfill, the nonprofit organization is inviting the public to mark the milestone with them. Starting at 5:30 p.m., community members can snack on appetizers, win door prizes and get drink tickets in exchange for a donation to the organization.