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                                                                                                                                                                                                                                             DEVELOPMENT STUDIES

                                                                            Copyright © 2008 International Development Options

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Volume Five                                                                   Winter 2007-Spring 2008                                                              Numbers 1-2.

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      THE EFFECTIVENESS OF WASTE STABILIZATION PONDS IN THE TREATMENT OF CITRUS

     PROCESSING AND SEWAGE EFFLUENT: THE CASE OF MAZOE CITRUS ESTATE IN ZIMBABWE

 

       Phillip Taru                                                                        Ishmael Sango

      Noline Zhanda                                                                  Chinhoyi University

      Alex Kuvarega                                                                   Zimbabwe

      Bindura University

      Zimbabwe

 

       Published Online: February 10, 2017

 

 

      ABSTRACT

 

The article discusses the effectiveness of waste stabilization systems at Mazoe Citrus Estate in the treatment and processing of sewage effluent. Water samples from the river were collected and analyzed for the same parameters as pond water. This was done to establish any changes in the river water quality because of the discharge or seepage from the pond system. Samples were analyzed for electrical connectivity, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), nitrogen total and total phosphorous as well as pH tests. The results show that pH did not comply with the Zimbabwe National Water Authority (ZINWA) standards. The COD, nitrogen total and total phosphorous levels were abnormally high, with some reaching 400 mg/L and 9mg/L, respectively, exceeding the ZINWA redline bands limits. This implies that the effluent presents significant risks of water pollution and environmental damage. The results conclusively indicated that waste stabilization pond systems were not effective in the treatment of citrus processing and sewage effluent.

   

 

IDO        ISSN: 1093-8281                 Copyright © 2017 International Development Options

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