Effluent decontamination system

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processing is offset against the volume of effluent that can be sterilised, as the steam takes up space that could be used to hold effluent. Steam injection is a very noisy process – steam rushing through the effluent can sound like a jet engine. The process can also cause solid material to stick to the sides of the sterilisation tank, which can hinder heat transference from the walls of a jacketed vessel. Low temperature and pressure variants of batch steam injection EDS have been shown capable of decontaminating biosafety level 2 waste by subjecting it to a sterilisation temperature of 82.2 °C. This low temperature requires a long time period of six hours to achieve sterilisation.

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is passed through the cavity in the walls of jacketed vessel, raising its temperature of over 121 °C. Once all the effluent has been heated to at least 121 °C for at least 30 minutes, all biologically hazardous material within the kill tank will have been sterilised. At this point, the tank

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Batch steam injection systems function similarly to a batch steam EDS, but steam is passed directly through the effluent during the sterilisation stage. This procedure increases the speed at which the effluent can reach the required sterilisation temperature, increasing the throughput time. Speed of

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Continuous flow EDS pass liquid effluent through a distance of heated pipework to sterilise it. The heated pipework is frequently coiled to minimise heat loss and the space required. The length and bore of the heated pipework can vary greatly, depending on the rate of flow of the effluent and the

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While EDS are designed chiefly to sterilise liquid waste, they can in some instances sterilise solid material carried by the liquid effluent. However the EDS may require grinders to break down the solid materials before they enter site of sterilisation in the EDS, and macerating paddles to stir

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Chmielewski, Revis; Day, Michael; Spatz, Stephen; Yu, Qingzhong; Gast, Richard; Zsak, Laslo; Swayne, David (1 December 2011). "Thermal Inactivation of Avian Viral and Bacterial Pathogens in an Effluent Treatment System within a Biosafety Level 2 and 3 Enhanced Facility".

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Chmielewski, Revis; Day, Michael; Spatz, Stephen; Yu, Qingzhong; Gast, Richard; Zsak, Laslo; Swayne, David (December 2011). "Thermal Inactivation of Avian Viral and Bacterial Pathogens in an Effluent Treatment System within a Biosafety Level 2 and 3 Enhanced Facility".

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Cote, Christopher K.; Weidner, Jessica M.; Klimko, Christopher; Piper, Ashley E.; Miller, Jeremy A.; Hunter, Melissa; Shoe, Jennifer L.; Hoover, Jennifer C.; Sauerbry, Brian R.; Buhr, Tony; Bozue, Joel A.; Harbourt, David E.; Glass, Pamela J. (9 July 2020).

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in the effluent have been sterilised. After sterilisation, the sterilant must be neutralised before the effluent can discarded into a sewer. As such, a batch chemical EDS requires a large quantity of chemicals, both sterilants and neutralisers, to operate

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For smaller scale systems of less than 100 gallons a day, chemical effluent decontamination systems can be used. Effluent is collected in a sterilisation tank, where it is mixed with a chemical sterilant such as

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