Biting at this age is normal. Usually the child is expressing his anger or frustration. Try to teach him other ways to deal with his emotions. Putting him in a play pen or in some other way provide a structured secure place in which to calm down does help. My sons Day Care worker uses "get into the playpen until I tell you to get out." It's like a timeout. I've been there several times when she's used it. Her voice is calm. She tells them why she's putting them there and when it's time to get out she asks them to "correct" the event that caused the time out. If it's biting, tell the person that you're sorry. If its for throwing a toy, go pick it up and put it away. She uses a stern tone of voice during this process and then when they've done the making it right part she gives them a hug and talks with them kindly. I've seen kids jump into the playpen with just a look from her. She is consistent. She'll stop a conversation with me to enact the process when she sees something out of the corner of her eye.
The sides of the playpen provide a recognizable boundary. And her using this one form of discipline for all misbehaviours consistently seems to teach the child quickly.
Being in the play pen is not punishment. Doesn't feel that way to me. It's discipline. and what you want to teach the biter is how to control his need to bite.
I've also heard of teaching them to jump up and down, running across the room or doing anything physical to work off his feelings. Tell the child, I see that you're angry. Let's work off the energy that being angry gives you and send them running across the room if there's space for that. Jumping jacks would work too.
The good thing about biting is that it stops. It seems to be a stage that many children go thru. The important thing is to teach the child an alternative way to handle his feelings. Using hot sauce or any other way that punishes without teaching alternatives may stop the biting. But he's left with still not know what to do with his feelings. He may not bite but he may start hitting or grabbing toys. The feelings are still
there and need to be managed.