Short- and long-term effects of olive mill wastewater land spreading on soil chemical and biological properties

Abstract

Olive mill wastewater (OMW) is the main residual product of olive processing and its disposal can\ud represent a relevant environmental issue in Mediterranean countries, where olive oil production is large\ud and concentrated in a short-lasting period. OMW is characterised by high pollutant load, salinity and\ud phytotoxic levels of polyphenols, but also by a high amount of organic compounds and plant mineral\ud nutrients. Therefore, OMW field spreading may represent a low cost contribution to crop fertilisation and\ud soil amendment. Here, we assessed the short- and long-term effects of long-lasting repeated OMW\ud applications on soil chemical and biochemical properties and arbuscular mycorrhizal fungi (AMF). In\ud addition the influence of two OMW management strategies, characterised by different seasonality of\ud spreading (autumn and spring times) was evaluated. Soil was amended by 0 and 80 m3 ha1 of OMW.\ud Principal coordinate analyses (PCO) together with PERMANOVAs showed that long-lasting repeated\ud OMW spreading: (i) affected the main soil chemical and biochemical parameters in the short-term,\ud whereas did not determine long-term residual effects irrespective of the application times; (ii)\ud decreased AM fungal root colonisation both after autumn and spring OMW applications; (iii) improved\ud arbuscule occurrence in the short- and long-term for both disposal times. Therefore, at least regarding\ud the monitored parameters, we can argue that OMW may be utilised as organic amendment in agriculture\ud under controlled conditions given the short-term negative effects on soil quality, which can be considered\ud negligible after a suitable waiting period

Effects of Olive Mill Wastewater on Soil Microarthropods and Soil Chemistry in Two Different Cultivation Scenarios in Israel and Palestinian Territories

“…Long-term acidification effects of OMW application in Gilat and Bait Reema are unlikely due to the soils' significant carbonate content ( Table 2). This is in line with other studies [6,21], which did not report acidification effects either.…”

“…Thus, it is highly relevant to understand how OMW application to soils affects soil invertebrate communities and soil properties. As biological effects of OMW amendment of soil have been observed during the early weeks after OMW-soil contact [17,21,22], this study also focuses on this period and investigates short-term effects. However, the impacts of OMW application on soil biology are still largely unknown and they are likely to depend on climate, soil type and management method.…”

Desempenho De Sistema De Irrigação Operando Com Percolado De Aterro Sanitário

“…As características do gotejador utilizado também é um fator importante a ser considerado (Bene et al, 2013).…”

Morphology of Modified Biochar and Its Potential for Phenol Removal from Aqueous Solutions

“…They are reported as human carcinogens, exhibit poor biodegradability and may also cause long-term ecological damage (Bayramoglu et al, 2009;Di Bene et al, 2013;Inyang and Dickenson, 2015). The removal of phenolic compounds with the use of biochar was reported so far in a limited number of studies.…”