Can I also throw away X-ray images, thermometers, glasses, gauzes and dressing material?

No. Nor can you deposit any other medical equipment such as prosthetics, needles or sharp objects, which are usually taken to Recycling Centres or municipal Ecoparks. These facilities usually provide specific containers or skips in which to deposit sanitary waste or any other kind of waste. Failing that, such waste should be deposited in the ordinary rubbish bag.