Download e-book for kindle: A Pilot Constructed Treatment Wetland for Pulp and Paper by Margaret Akinyi Abira

By Margaret Akinyi Abira

ISBN-10: 0415467152

ISBN-13: 9780415467155

This learn, performed in Kenya, supplies the 1st perception into the functionality of a built remedy wetland receiving pulp and paper mill wastewater within the tropics.

The wetland successfully got rid of natural topic, suspended solids, phenols and food. BOD and phenols relief premiums are stated for the 1st time. layout parameters and directions for the set-up and upkeep of a full-scale wetland are prompt. The learn concludes that integrating a full-scale wetland, as a tertiary level with the present therapy ponds may considerably increase the standard of water in River Nzoia downstream of the effluent discharge.

This is a priceless source publication for scientists, managers and scholars within the box of wetland ecology, water and environmental management.

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Additional info for A Pilot Constructed Treatment Wetland for Pulp and Paper Mill Wastewater: Performance, Processes and Implications for the Nzoia River, Kenya UNESCO-IHE PhD

Sample text

Organic matter, suspended solids and phenols Wastewater was sampled every two to four weeks for the determination of BOD, chemical oxygen demand (COD), total suspended solids (TSS), Total nitrogen (TN) and total phosphorus (TP), phenols, sulphate and chloride at the following points: raw wastewater before screening (Fig. 4 (stabilization lagoon - 6). Samples were also taken at the end of the partially vegetated channel that conveys wastewater to the river. Laboratory analysis was carried out according to procedures described in the Standard Methods (APHA, 1995).

The actual detention time can be determined by use of a non-reactive tracer. In this study lithium chloride was used to determine the actual retention time during the continuous flow mode of operation. The tracer concentration-time distribution can give additional information on the nature of flow or extent of mixing within the wetland system. Kadlec and Knight (1996) analysed the tracer response for FWS wetlands and concluded that a “tanks-in-series” (TIS) model with three “continuously stirred tank reactors” (CSTRs) would best represent the observed flow characteristics.

9 m/s). 05) between the different phases of batch and continuous flow. The difference between wetland inflow and outflow water temperature was significant in batch operation but not in continuous flow. 34°C. 25°C). There was no significant difference in temperature between SSF cells planted with different species. The SSF unplanted controls had similar mean temperatures as the planted ones except for the papyrus cells. 3). 9 mm/day and accounted for 12 to 14 % of inputs to individual SSF wetland cells (series A-D) and 7 % for the FWS cells (series E).

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A Pilot Constructed Treatment Wetland for Pulp and Paper Mill Wastewater: Performance, Processes and Implications for the Nzoia River, Kenya UNESCO-IHE PhD by Margaret Akinyi Abira


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