Fate of nutrients and heavy metals during two-stage digestion and aerobic post-treatment of municipal organic waste

Knoop, Christine; Tietze, Michael; Dornack, Christina; Raab, Thomas

doi:10.1016/j.biortech.2017.12.019

Cited by 34 publications

(27 citation statements)

References 39 publications

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“…However, except for phosphate that is strongly adsorbed in soils, the high risk of nutrient anion depletion and leaching to groundwater should be taken into account, due to limited anion exchange sites. Knoop et al () presented that although the element concentration is higher in composted digestates, the water‐extractability of nutrients is significantly lower from composted over dried digestates. Spreading of dried digestates during vegetation growth may therefore be advisable.…”

Section: Discussionmentioning

confidence: 99%

“…After composting, OM contained less accessible compounds of higher structural complexity (Maynaud et al, 2017). A study conducted by Knoop et al (2018) showed a significant reduction in volatile solids and carbon during composting process of solid digestates. On the other hand, the digestate that was not composted as a post treatment contained a larger part of Gigliotti (2007) found that a high carbon elution indicates an immature waste.…”

Section: Discussionmentioning

confidence: 99%

“…According to Schüch et al (2016) about 9 milion Mg of municipal organic wastes is available for further utilization with regard to circular economy concepts. According to Kern, Raussen, Graven, Bergs, and Hermann (2012), more than 100 biogas plants in Germany are specialized on the treatment of municipal organic wastes, which subsequently are to be redistributed to arable land as a substitute for synthetic fertilizers (Knoop, Tietze, Donrack, & Raab, 2018). Sopper (1993) stated that applying biosolid compost, for site restoration, can improve soil physical properties, for example, by increasing water infiltration and water holding capacity (Vangronsveld et al, 2009).…”

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confidence: 99%

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Effect of the post treatments for biowaste‐based digestates on water solubility of nutrients and iron‐cyanide (Fe‐CN) complex mobility

2019

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With recent policy developments, an increase in organic waste utilization is expected. However, the use of organic amendments to reduce the mobility of iron‐cyanide (Fe‐CN) complexes and simultaneously promote vegetation growth has not been studied before. Therefore, we evaluated the effect of (a) drying, (b) composting, and (c) pelletizing on the ability of digestates (biowastes from an anaerobic treatment of municipal organic waste) to provide easily available nutrients and stabilize Fe‐CN complexes. Extraction with deionized water resulted in a considerably higher nutrient and carbon elution from air‐dried and oven‐dried digestates (50% dry matter [DM] of total K, 11% DM Mg, 7% DM Ca, and 6% DM C). Mixer‐pelletized digestates stand out among the composted samples (42% of total K, 3% DM C, 5% DM P, 1.5% DM Mg, and 1% DM Ca). The adsorption experiment showed the highest significant tot. CN conc. reduction using noncomposted, air‐dried (100%), and oven‐dried (82%) digestates. Significant correlations have been found for Mg, Ca, and dissolved organic carbon elution and slightly acidic pH as well as CN adsorption. The Fourier transform infrared analysis revealed Fe‐CN complexation on inorganic (K2Mn[FeII (CN)6] and NH4Fe[FeII (CN)6]) and organic constituents indicating formation of nitriles. Air‐ and oven‐dried digestates showed the most promising results in terms of nutrients' availability and ability to decrease Fe‐CN complex mobility.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of the post treatments for biowaste‐based digestates on water solubility of nutrients and iron‐cyanide (Fe‐CN) complex mobility

2019

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“…Osim toga, mogući način finalnog tretmana mulja je monoinsineracija u specijalno dizajniranim insineratorima, gdje se iz procesa insineracije može iskoristiti otpadna toplota [6]. Pošto je otpadni mulj, kao organska materija, podložan truljenju, jedan od načina krajnjeg tretmana mulja mogao bi biti i proces anaerobne digestije, u svrhu dobijanja metana [7].…”

Section: Uvodunclassified

“…Produkti anaerobne razgradnje su proizvedeni gas i ostatak mulja koji se naziva digestat. Transfer koeficijenti koji su korišćeni na nivou dobara su 0.15 za proizveden gas i 0.85 za digestat [7]. Proizveden gas je u slučaju anaerobne digestije od 40-60% metan, pa se može iskoristiti u energetske svrhe.…”

Section: Scenariounclassified

Evaluacija Mogućnosti Energetske Valorizacije Mulja Iz Tretmana Komunalnih Otpadnih Voda

Mićić¹,

Stanisavljević²,

Vujić³

2018

Zbornik radova FTN

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Oblast -ZAŠTITA ŽIVOTNE SREDINEKratak sadržaj -Osnovna svrha master rada je da se prikaže koji od načina tretmana otpadnog mulja nastalog nakon tretmana komunalne otpadne vode bi bio najpogodniji u smislu energetske valorizacije, odnosno mogućnosti proizvodnje energije prilikom tretmana mulja. Osim toga, analizirana je i stopa recikliranja i negativan uticaj tremana mulja na životnu sredinu. Modeli su predstavljeni kao dijagrami analize tokova materijalai pored materijalnog toka (mulja) posmatrani su i tokovi supstanci (kadmijuma i ugljenika). Scenariji su izrađeni za teritoriju grada Novog Sada i nastali mulj u toku jedne godine, nakon izgradnje postrojenja za prečišćavanje otpadne vode. Ključne riječi: komunalna otpadna voda, otpadni mulj, analiza tokova materijala, cementara, anaerobna digestija, insineracija Abstract -The main purpose of the master thesis is to demonstrate which of the methods for treatment of sewage sludge would be most suitable in terms of energy valorization, or the possibility of energy production in the treatment of sludge. In addition, the recycling rate and the negative impact of sludge treatment on the environment were analyzed. The models were shown as diagrams of material flow analysis and in addition to the material flow (sludge), the streams of substances (cadmium and carbon) were also observed. Scenarios were made for the territory of the city of Novi Sad and the resulting generated sludge during one year, after installation of municipal wastewater treatment plant.

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Fundamentals of Biofuel Production Using Anaerobic Digestion: Metabolic Pathways and Factors Affecting the Process

Braga

Zaiat

2022

Applied Environmental Science and Engineering for a Sustainable Future

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Fate of nutrients and heavy metals during two-stage digestion and aerobic post-treatment of municipal organic waste

Cited by 34 publications

References 39 publications

Effect of the post treatments for biowaste‐based digestates on water solubility of nutrients and iron‐cyanide (Fe‐CN) complex mobility

Effect of the post treatments for biowaste‐based digestates on water solubility of nutrients and iron‐cyanide (Fe‐CN) complex mobility

Evaluacija Mogućnosti Energetske Valorizacije Mulja Iz Tretmana Komunalnih Otpadnih Voda

Fundamentals of Biofuel Production Using Anaerobic Digestion: Metabolic Pathways and Factors Affecting the Process

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