Risk of agricultural use of sewage sludge compost and anaerobic digestate

Gulyás, Miklós; Tomócsik, Attila; Orosz, Viktória; Makádi, Marianna; Füleky, György

doi:10.1556/aphyt.47.2012.2.4

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…In general, the main studies have been focused on the evaluation of bio-fertilisers with amendment effect on the different doses, species, and types of soil for the soil depending, with experiments scaling up from pots in greenhouse [20,21] or in outdoor [22,23] until open field applications [24,25]. In addition, many works investigated the phytotoxic effects of SS related to the excess of heavy metals [26,27], organic pollutants [28], and ammonia nitrogen [29]. In order to avoid or minimize such relevant limiting risks, SS should be pre-treated by bio-oxidative process by composting process before to yield it as soil conditioner [20,30].…”

Section: Reusing Sewage Sludge By Compostingmentioning

confidence: 99%

Reusing Sewage Sludge in Agriculture: A Mini-Review

Corato

2020

ARTOAJ

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Section: Reusing Sewage Sludge By Compostingmentioning

confidence: 99%

Reusing Sewage Sludge in Agriculture: A Mini-Review

Corato

2020

ARTOAJ

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“…The nitrogen content of digestate is a particularly important characteristic, as nitrogen is commonly considered to be the key factor limiting crop growth in agriculture [72,73]. The high NH 4 + -N content of the digestate increases the nitrogen content of soils; however, it is easily oxidized to nitrate [74]. Similar to the alteration of nitrogen content, the application of digestate results in a possible increase in the bioavailable potassium content, but any significant fluctuation in the bioavailable phosphorus content of the soil has not been detected [75].…”

Section: Introductionmentioning

confidence: 99%

Effects of Combined Application of Solid Pyrolysis Products and Digestate on Selected Soil Properties of Arenosol and Plant Growth and Composition in Laboratory Experiments

Gulyás

Someus²,

Klátyik

et al. 2022

Agronomy

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Biochars as soil amendments have been reported to improve soil properties and may have an important role in the mitigation of the consequences of climate change. As a novel approach, this study examines whether biochar and digestate co-application can be utilized as cost-effective, renewable plant nutrients. The effects of two types of biochar—wood chip biochar (WBC) and animal bone biochar (ABC), applied alone or in combination with an anaerobic digestate—on soil physicochemical properties, on the levels of selected elements, and on growth yields of ryegrass were studied in laboratory experiments. Most parameters were significantly affected by the treatments, and the investigated factors (biochar type, application rate, and the presence of digestate), as well as their interactions, were found to have significant effects on the characteristics investigated. The easily soluble phosphorus content (AL-P2O5) of the soil increased in all WBC and ABC biochar treatments, and the presence of digestate caused a further increase in AL-P2O5 in the case of anaerobic digestate-supplemented ABC treatment (ABCxAD). The pH increased in both ABC and WBC treatments, and also in the case of ABCxAD treatments. Similar increases in the salt content were detected in ABC-treated samples and in ABCxAD treatments at higher application rates. WBC increased the water holding capacity and carbon content of the soil. Phytotoxic effects of biochars were not detected, although higher doses resulted in slower germination. Combined biochar–digestate applications resulted in increased plant yields compared to sole biochar treatments. Thus, biochar–digestate combinations appear to be applicable as organo-mineral fertilizers.

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“…Besides these studies, many papers on the soil application of the sewage sludge (McGrath et al, 1995) and its derivatives (Andrés et al, 2011;Tarrasón et al, 2008) have also been published: in general, the main focus has been the evaluation of fertilising effects depending on the dose, species and soil studied, with experiments scaling from pots in greenhouses (Wong et al, 1996;Perez-Murcia et al, 2006) to pots in outdoor (Singh and Agrawal, 2009;Alvarenga et al, 2016), to open field applications (Hussein, 2009;Rigueiro-Rodríguez et al, 2010). On the other hand, many works have investigated the phytotoxic effects of SS and SSAD, which are principally related to the excess of heavy metals (Singh and Agrawal, 2007;Belhaj et al, 2016), organic pollutants (Erhardt and Prüeß, 2001) and ammonia nitrogen (Gulyás et al, 2012).…”

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confidence: 99%