Proper disposal of human waste and sewage sludge

When it comes to the vital topic of waste water disposal, there is a fundamental distinction to be drawn between the disposal of human waste and the disposal of sewage sludge. Human waste from underground collection tanks is disposed of in treatment plants, where the mechanical, biological and other methods for treating waste water produce sewage sludge. This can be grouped into three categories, depending on how much harmful material it contains - from uncontaminated to heavily contaminated. Again, a variety of disposal methods are available for this sludge - for example, it can be put to agricultural use, or sent for thermal recycling. There is also comprehensive legislation governing the management and disposal of waste water and sewage sludge.