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Cesspits

Cesspools are used where there is no public sewer available and where the sub soil cannot soak away the liquid from a septic tank, or if there is no suitable stream or river to take the final effluent from a processing plant. They are simply a large enclosed chamber to collect the effluent, which is then removed on a regular basis and taken to a sewerage treatment works. Cesspools are considered to be a last resort for dealing with sewerage.

This depends on usage; glass fibre bottle type septic tanks should be emptied at least annually or as recommended by the manufacturer

As with septic tanks this again depends on usage however they are generally serviced every six months or as recommended by the manufacturer. Lifting pump chambers are generally serviced annually or as recommended by the manufacturer.

 

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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