Septic tank/Biosystems

cb7

Currently in the process of trying to decided what biosystem to use. The concrete ones or the plastic ones. There is a good difference in price. Any suggestions?

RKQ

It depends on your soil conditions etc.
A high water table can couse the plastic tank to float up, so in reality it is weighted down with concrete! Cast into position on site.

This concreting in place can add to the cost considerably.

Either type with a full IAB certificate should be acceptable to your Local Authority.

rsheehan

Hi cb7

You should look carefully at each treatment system, concrete or plastic to sea how well they treat the waste water. The two most important measures of any system is BOD (Biological oxygen demand) and TSS (Total suspended solids).
Each system has to comply with a minimum standard of BOD/TSS 20/30.

The lower the numbers the better. I have been shopping around for a waste water treatment system for a house I am building and I have noticed that some systems put out cleaner water then others. You should take this in to account when you are looking for a system.

One thing i would recommend is that you build a large septic tank, as this gives the sludge time to settle out and means that whatever system you install will work more efficiently and it is very important that you have your septic tank emptied every few years.

This doccument is usefull http://www.epa.ie/downloads/advice/water/wastewater/shwwt%20consultation%20manual.pdf

Poorly maintained wast water treatment systems or in the case of many older houses the complete lack of any treatment system is a huge cause of water pollution in Ireland.

gwenuska

Does anyone know how much one should budget for a septic tank? Ball park would be fine? From - To

Anyone?

dlambirl

I'd recommend a concrete one cos alot of friends of mine have had alot of trouble with the plastic.

cb7

With regards to prices I just got a septic tank for 3000 Euro. The concrete ones are around 4000Euro and the plastic ones are around 2000Euro. Depends which ones you want.

Poor Uncle Tom

I haven't seen one for €2,000 in a very long time.

dlambirl

cb7 wrote: »

With regards to prices I just got a septic tank for 3000 Euro. The concrete ones are around 4000Euro and the plastic ones are around 2000Euro. Depends which ones you want.

Very few houses are being allowed Septic Tanks at the min. Concrete Tanks are around €4500 and Plastic tanks are €3500. I dont know what type of a tank you'd buy for €2000

Schooby

I bought a new concrete septic tank concrete distribution box and concrete risers last summer all in delivered for 900 euro. not a proprietary system just a conventional tank.

Builderfromhell

The septic tank or treatment unit is one cost. You then need to install the percolation area. Depending on the design this could be relatively simple ie. 100m of pipe on 2" stone in trenches or it may be a raised bed.
A percolation area could cost €3,000.
This of course depends on design and availability of stone and if needed imported soil

The key to good waste water disposal is the percolation area, IMHO.

maureen55

Have you looked at the Biorock sewage treatment plant? It doesn't need any electricity or spare parts and is sustainable, so it will be cheaper to run. When I enquired, they told me it was about 2600 Euros. They have a website, but I can't remember the address. Search in Google

yettie1701

concrete tanks while they may sound dearer when everything is taken into account work out roughly the same. Concrete tanks dont need concrete bases or to be filled around the sides which cots around 300 euro. You just dig the hole and drop the tank in. There is also a danger while de-sludging plastic or fibreglass systems of the tank collapsing due to the pressure not being equal on both sides if not properly installed. A concrete tank will cost 3000 with a bit of bargaining. There are also differences in ow each system treats effulant <SNIP>.

Edit: Do not pimp a product on site. Banned