Hmmmmmmm, weird hand... bb did not raise a lot on flop and the fact he made it this big, really confused me...
The fact he barrels this turn, without flush potential, is definitely something like a set or K10s. Don't think a hand like KQ or or Q10 would bet this turn this big and potbet river. 5 at river also gives him the overplayed 78s maybe, so I think this is a clear fold.
Dont feel good about it though 
PokerStars - $0.50 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
Hero (BTN): 179.7 BB
SB: 87.92 BB (VPIP: 26.67, PFR: 20.00, 3Bet Preflop: 0.00, Hands: 17)
BB: 163.28 BB (VPIP: 27.65, PFR: 21.96, 3Bet Preflop: 7.43, Hands: 399)
UTG: 100 BB (VPIP: 22.95, PFR: 14.77, 3Bet Preflop: 1.90, Hands: 514)
MP: 59.18 BB (VPIP: 18.82, PFR: 11.76, 3Bet Preflop: 0.00, Hands: 88)
CO: 45.84 BB (VPIP: 28.85, PFR: 23.08, 3Bet Preflop: 6.06, Hands: 106)
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has 6♥ 6♠
fold, fold, fold, Hero raises to 2.1 BB, fold, BB calls 1.1 BB
Flop: (4.7 BB, 2 players) J♠ 9♥ 6♦
BB checks, Hero bets 3 BB, BB raises to 12.5 BB, Hero calls 9.5 BB
Turn: (29.7 BB, 2 players) Q♣
BB bets 21 BB, Hero calls 21 BB
River: (71.7 BB, 2 players) 5♣
BB bets 68.48 BB, fold
Spoiler
BB wins 68.48 BB
