The polluting potential of stormwater run-off from man-made surfaces has become increasingly recognised. Run-off can carry a variety of contaminants, including amongst others heavy metals and hydrocarbons. A number of techniques have emerged for the quantity and quality control of urban run-off. The main two have been widely and successfully applied. These have involved the [...]
Commercial Biofilter Treatment plants are a biological treatment unit, requiring the growth of aerobic bacteria i.e. bacteria that lives with oxygen, for this air is continuously blown into a Filter in the aeration chamber. As can be observed with the system the primary chamber manhole has air vent cast into lid. This acts as air [...]
I’m putting in a new soak away pipe for my ces pit as the old one is blocked, i’m digging in about 25 metres of perforated pipe but need to know what is the best size of stone to put around the pipe to form the soak away? the pipe is 80mm and has small [...]
In all my drains in my house, there is this black slime nastiness accumulating on the inside. Is it mildew? I scrub the black off the inside of the drain plugs with a toothbrush and it comes up. Two weeks later when I go to clean it again, more black has ‘grown’ in. It also [...]