老师好！

1）旧东西被送到厂里并循环利用。

The old things was sent to the factory to recycle/to be recycled/for recylcing ?

2）垃圾接着被运去作回收处理。

The rubbish is then carted away to recycle/to be recycled/for recycling ?

请教老师：to recycle 不定式表目的可以吗？还是应该用to be recycled呢？和 for recycling 都可以表目的还是作用功能呢？

搞不清楚to do 还是 for doing ? 麻烦老师对这2个详解一下，谢谢！