Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/2359
Title: Evaluation of phytotoxicity effect on selected crops using treated and untreated wastewater from different configurative domestic wastewater plants
Authors: Ravindran, B. 
Kumari, Sheena K. 
Stenström, Thor-Axel 
Bux, Faizal 
Keywords: Wastewater treatment plants;Crop seeds;Germination index;Phytotoxicity effect;Treated wastewater
Issue Date: 2016
Publisher: Taylor and francis Online
Source: Ravindran, B. et al. 2016. Evaluation of phytotoxicity effect on selected crops using treated and untreated wastewater from different configurative domestic wastewater plants. Environmental Technology. 37(14): 1782-1789.
Abstract: This study investigated the phytotoxicity effect of untreated and treated wastewater collected from two different configurations of domestic wastewater treatment plants in South Africa. The phytotoxicity effect on vegetable seed growth was studied in terms of germination index (GI), relative seed germination (RSG) and relative root elongation (RRE) using four commercial crop varieties, viz., tomato (Lycopersicon esculentum), radish (Raphanus sativus), carrot (Daucus carota) and onion (Allium cepa). According to phyototoxicity limits, 80% germination and above is regarded as non-toxic and less than 50% GI is regarded as highly toxic and not suitable for agricultural purposes. In our study, seeds were irrigated with concentrations of 25%, 50%, 75%, 100% of treated effluent (TE) and untreated effluent (UTE). The TE results were best with the highest GI (%) recorded as tomato, 177; carrot, 158.5; onion, 132; and lettuce, 124. The results of this study indicate that TE showed no phytotoxicty effects and recorded above 80% GI. The UTE irrigated crops reached a GI of only 50% and above which is clear evidence of the beneficial effect of waste water treatment. The overall results confirmed that treated wastewater has a beneficial effect on agricultural crops and can be used as a liquid fertilizer.
URI: http://hdl.handle.net/10321/2359
ISSN: 0959-3330
Appears in Collections:Research Publications (Water and Wastewater Technology)

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