activated sludge

This tag is associated with 5 posts

Controlling the Water Industry – Sludge III – Bubble, Bubble, toil and trouble!

As promised in the last blog the subject that is being discussed this week is sludge digestion and some of the more simplified control systems and instrumentation surrounding this area and the possibilities that exist. Sludge digestion is probably one of the most common ways of dealing with sludge, getting a quality product from waste … Continue reading

Controlling the Water Industry – Sludge II – How thick do you want it?

In this week’s blog Oliver Grievson looks at the most basic process of sludge treatment outside what is done on sites in settlement tanks or sludge tanks. He is of course thinking about mechanical thickening or dewatering, and will of course exclude picket fence thickening (it has its place but not in this blog). When … Continue reading

Controlling the Water Industry – Activated Sludge Part IV – Whoops! Where did all those solids go?

In this last post on Activated Sludge Oliver Grievson is going to talk about what can be done within the process that can protect the overall permit of the treatment works and attempt to sum up what he has  said so far. As we all know of all the process that are used in wastewater … Continue reading

Controlling the Water Industry – Activated Sludge Part III – The solids in the plant go round and round

In the third post of this blog series on the problems associated within the activated sludge process and how to control them Oliver Grievson is going to look at the Return Activated Sludge system. So what problems are seen and how can they be fixed? A particular one that I have seen and this especially … Continue reading

Controlling the Water Industry – Activated Sludge Part I – Solids, Solids and more solids

To start off this series this series of blogs is going to look at a basic nitrifying activated sludge plant it will not look at activated sludge plants that are designed to remove nutrients although some of the principles will be the same. As a general rule the problem with the operation of the activated … Continue reading