Collecting and treating domestic wastewater can be quite a problem in rural areas or small communities that are remote from municipal treatment plants. One traditional alternative to mains sewers is to collect wastewater in cesspools, or storage tanks, then tanker it away for remote treatment. Another is to use a septic tank, in which the wastewater is settled out and then partially digested by natural biological processes before being discharged as a liquid effluent into a soak away specially created for that purpose. However, in recent years, package plant and filtration systems have become more established as alternatives.
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