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April 2011
Leachate Treatment by Filtration - The Three Mistakes People Make
"Leachate Treatment by Filtration seems like a easy and cheap way to treat leachate according to sewage
treatment text books. But in reality it seldom works."
By: Steve Knowing how to handle things and the way to get things done can be important. Knowing the details of the easiest method to really do it is important too. But you cannot stop there, that is not enough by itself. You also have to really know what to avoid, what mistakes to circumvent. Among the best methods to achieve that is learning what errors other people have made and once you do, make sure to avoid them. For those that decide to install a leachate treatment filtration system as a nitrifying biological filter, with media such as anthracite or plasic media designed to provide a large surface area for fixed film biomass to provide maximised biological filtration there are problems which arise. Inexperienced designers of leachate treatment plants get things wrong and fail. Displayed below are the 3 most widespread errors that individuals make with those that decide to install a leachate treatment filtration system such as a percolating/trickling filter, with media such as anthracite or plasic media designed to provide a large surface area for fixed film biomass to provide maximised biological filtration there are problems which arise. Number one. The text books for sewage treatment are written for a completely different organically contaminated effluent. Why this is very important is the much higher strength in general, the presence of much higher salts concentrations, and the elevated ammonia make using leachate treatment filtration for leachate quite a different matter. For avoiding this problem you need to tread really carefully and for all but the weakest leachates avoid this method altogether. 2nd, the metals in MSW/sanitary leachate tend to oxdise on the top of the trickling filter. Getting this right is essential considering that the effect of tis will be that a pan of material wil most likely build up on the top of the trickling filter. What you ought to do then is start all over again with a new filter, but the new filter costs a lot of money and until the biomass has built up on the surface of the filter the removal of ammonia will be very poor. And lastly, you should not lose awareness of the fact that filtration without biological nitrification won't remove the ammoniacal nitrogen adquately. This issue occurs when the treatment process designer does not make full allowance for the diferences between foul sewage and MSW leachate. The best way to stay away from that is to not rely on bioligical filtration for the vast majority of landfill leachates for their treatment. Fully understand these types of prevalent mistakes with those that decide to install a leachate treatment filtration system as a nitrifying biological filter, with media such as anthracite or plasic media designed to provide a large surface area for fixed film biomass to provide maximised biological filtration there are problems which arise and very carefully avoid them. As a substitute, stick to the recommendations preceding with regard to doing it correctly. Avoiding these mistakes is not difficult when you know to watch out for them! Source: http://leachate.eu
Discover how to provide successful leachate management at landfill sites by going to
this leachate management web site at leachate.co.uk/main/leachate-management.
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