ACTIVATED SLUDGE PROCESS 1

[5432101]

Hi,
Myself from IPCL , INDIA. Is it true that surlus bio-mass / biological sludge from Activated sludge process can be treated so that the solid waste(dried biomass) disposal is not required . Heard about thermophillic biodegradation , Anaerobic digestion , wet air oxidation etc . Is any of these viable . For anaerobic digestion I think first solubilisation is required . Thermophillic aerobic degradation is reported to be developed in china and imlemented in Mitsubishi .
Any useful hint ?
Thanks in advance

 

[senglish]

Sorry about the late reply - I've just discovered the waste treatment forum.

I'm not familiar with some of the processes you mention, but there's certainly a solid product from anaerobic digestion which you have to dispose of.

In the UK, with our limited space for landfill, water companies incinerate some of their sludge; although its energy intensive, the flue gas has to be carefully treated and there's still ash to get rid of.

Here's a link which may interest you. The claim is that all the solids get fully digested over time, so there is no need for sludge disposal. Experience from the first 20 months operation at Errol in Scotland supports this.

http://www.mwhglobal.com/press_releases/press_2000_07_17_00.asp

Hope that's of some interest.

 

[mmo]

hi 5432101
There are some biologycal processes that produce so much less solid waste than others. In some circumstances, SBR plants produce much less sludge than activated sludge.

you can find some info in the following site:

http://www.andien.com.ar

if you need more info just ask me

rgds
mmo