| 摘要 |
<p>Generally aerobic and anaerobic wastewater treatment plants require substantial areas of land for the effective treatment of liquid waste streams to achieve very low levels of Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) reduction. These plants are also very expensive to construct and operate. The size and cost of wastewater treatment plants can be reduced by the use of chemical treatment systems, however these are usually expensive to operate and do not achieve the low levels of BOD and COD required in satisfying regulating authorities globally. A system comprising pH control, settling, homogenisation under pressure and a combination of flocculation, flotation and treatment with concentrated ozone gas has the ability to achieve very low BOD and COD discharge levels as well as being cost-effective solution with regards to construction and operation.</p> |
