Trash place! (Brussels)

Hi everyone! I've had a major cleaning session and I have a lot to throw away or to give away. My first question is: is there a place in Brussels where I can throw away all kinds of stuff? It's not something that I can put in the white garbage bag and put it outside the house every Friday and Tuesday. Second question: do you know a charity organization in Brussels? I'd like to give away some clothes, shoes, maybe a nice bed frame & mattress etc...

Thank you!