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Cesspits

cesspit, Buckinghamshire Septic Tanks

Cesspits are only installed in areas and where a septic tank or treatment plant cannot be installed. Here at AA Biotech, we always consider the options that are available to your circumstances and we will provide a report and quotation for the preferred method of sewage disposal.

A cesspool or cesspit is a sealed underground storage tank which holds sewage until it is emptied out and disposed of. It may be brick or block construction or manufactured in steel or reinforced glass fibre and must have minimum capacity of 18,000 litres.

A cesspit works in the same way as a septic tank except that it only has one chamber. These types of tanks need to be serviced and de-sludged on a regular basis to ensure the system operates effectively. This operation needs to be carried out by an experienced waste disposal expert and should normally take place every 12 months.

Silage Tanks

silage tank buckinghamshire

Silage tanks are manufactured in the same sizes as cesspools, and are used for the storage of more toxic natural or chemical waste. Silage tanks are manufactured using special resins designed to be resistant to aggressive silage effluent and to comply with all statutory regulations.

Silage effluent has the potential to cause severe environmental damage if allowed to enter a watercourse as it has a very high BOD (Biochemical Oxygen Demand), up to 200 times greater than that of domestic sewage. Therefore, if it enters a watercourse it can very quickly remove all of the oxygen and kill off all aquatic life withing the ecosystem.

As silage effluent has caused numerous severe pollution incidents in the countryside, there are now a number of very strict statutory controls to regulate its collection and storage. A typical application for a silage tank would be for a touring caravan site where a collection vessel was required to hold elsen waste from chemical toilet cassettes.

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