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Analysis of Wastewater Generated in Greenhouse Soilless Tomato Cultivation in Central Europe

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Department of Environment Engineering, Faculty of Environmental Science, University of Warmia and Mazury in Olsztyn, Warszawska 117a, 10-719 Olsztyn, Poland
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Department of Horticulture, University of Warmia and Mazury in Olsztyn, ul. Prawocheńskiego 21, 10-957 Olsztyn, Poland
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Author to whom correspondence should be addressed.
Water 2019, 11(12), 2538; https://doi.org/10.3390/w11122538
Received: 30 September 2019 / Revised: 13 November 2019 / Accepted: 27 November 2019 / Published: 1 December 2019
(This article belongs to the Section Water and Wastewater Treatment)
Soilless plantations under cover constitute a significant part of horticulture. This study aimed at determining the qualitative composition of wastewater generated from the soilless cultivation of tomato under cover. This is important for managing the wastewater, which may be recirculated to allow the or employ a partial or complete recovery of minerals. Two plantations located in north-eastern Poland, which differed in the type of substratum (coconut fiber or rockwool), were studied. The generated wastewater was characterized by a low content of organic matter and a high concentration of total nitrogen (TN), total phosphorus (TP), and salinity (EC). Over 99% of the TN was constituted by nitrates. The chemical oxygen demand (COD) changed from 50.07 to 75.82 mgO2·L−1 (greenhouse 1), and from 37.35 to 78.12 mgO2·L−1 (greenhouse 2); the content of TN changed from 403.59 to 614.89 mgN·L−1 (greenhouse 1), and from 270.00 to 577.40 mgN·L−1 (greenhouse 2); that of TP changed from 35.44 to 78.00 mgP·L−1 (greenhouse 1), and from 54.10 to 104.00 mgP·L−1 (greenhouse 2); and the EC changed from 3.53 to 6.93 mS·cm−1 (greenhouse 1), and from 4.94 to 6.94 mS·cm−1 (greenhouse 2). No statistically significant correlations were noted between TN and TP, or between TP and EC. View Full-Text
Keywords: drainage water; nutrients loss; tomato soilless cultivation; wastewater quality drainage water; nutrients loss; tomato soilless cultivation; wastewater quality
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Mielcarek, A.; Rodziewicz, J.; Janczukowicz, W.; Dobrowolski, A. Analysis of Wastewater Generated in Greenhouse Soilless Tomato Cultivation in Central Europe. Water 2019, 11, 2538.

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