Use of earthworms (Eisenia fetida) to reduce phytotoxicity and promote humification of pre-composted olive oil mill wastewater

Masciandaro, Grazia; Macci, Cristina; Doni, Serena; Ceccanti, B.

doi:10.1002/jsfa.4028

Cited by 11 publications

(16 citation statements)

References 42 publications

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“…The results again confirmed the humification was continuous after mineralization [13]. The value of TOC, VS, TEC and FAC (Table 1) decreased in AD and AC mainly caused by the biodegradation.…”

Section: Resultssupporting

confidence: 61%

“…It was discovered ammonium and organic matter stability were the most influential determinants but not pollutant burden for phytotoxicity [8,18], because after most of the easily available organic matter had been decomposed then the humification started and influenced phytotoxicity [13]. Additionally, the humification reactions are related to the degradations of carbohydrates, proteins, amino acids, lipids, and lignins into simpler compounds [14].…”

Section: Introductionmentioning

confidence: 99%

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Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization

Tang¹,

Li²,

Dong³

et al. 2016

Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)

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Abstract. Seed germination and germinated seedlings growth in sewage sludge were analyzed using acute and subchronic phytotoxicity assays, in order to explore the changes in sludge phytotoxicity during the combination of high-rate anaerobic digestion and aerobic composting. Results showed that compared with the raw sludge (RS), the seed germination index (GI) and shoot length of germinated seedlings of anaerobic digested sludge (ADS) reduced after anaerobic digestion. It implied the high-rate anaerobic digestion (AD) caused an increase of the sludge phytotoxicity. After 14-day Sequential aerobic composting, shoot length, fresh and dry shoot biomass of the seedlings in the aerobic compost sludge (ACS) significantly enhanced, compared with that of the ADS. As the composting lasted from 14 d to 60 d, there was not an evident increasing trend in seed germination and germinated seedlings growth of the sludge. Additionally, humification indexes significantly correlated with GI, and the negative slope at ACS 60d was in accordance with the decreasing trend of plant growth. The findings indicate the 14-day sequential aerobic composting was necessary and feasible for the complement of high-rate anaerobic digestion of sewage sludge in consideration of the phytotoxicity reduction.

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Section: Resultssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization

Tang¹,

Li²,

Dong³

et al. 2016

Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)

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“…According to Khwairakpam and Bhargava,8 vermicomposting can help promote cost effective and efficient reuse of industrial waste, animal wastes and agricultural residues. There is recent evidence of successful utilisation of earthworms in vermicomposting for stabilisation of biodegradable wastes generated from different industries, such as the brewery industry,9 oil palm industry,10 olive oil industry,11 paper mill industry,12 sago industry,13 sugarcane industry8, 14–18 and others.…”

Section: Introductionmentioning

confidence: 99%

The potential reuse of soybean husk as feedstock of Eudrilus eugeniae in vermicomposting

Lim

Sim

et al. 2011

J Sci Food Agric

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“…This assists colonization of microorganisms in and around the fragmented substrate [57,58]. The combined effect accelerates the oxidization, decomposition and stabilization of the organic matter, which becomes stable humus [59][60][61]. This is reflected by the humification index.…”

Section: Uv-visible Spectroscopymentioning

confidence: 99%

Transformation of the pernicious and toxic weed parthenium into an organic fertilizer by vermicomposting

Hussain

Abbasi

2016

International Journal of Environmental Studies

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In what is believed to be the first study of its kind, the compositions of the toxic and allelopathic weed parthenium, and its vermicompost, have been investigated using UV-visible and Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, gas chromatography-mass spectroscopy, and scanning electron microscopy. The studies reveal that the weed is transformed into a totally benign organic fertilizer during the course of its vermicomposting. This is indicated by substantial improvements in the humification index, mineralization of organic matter, and degradation of complex aromatics such as lignin and polyphenols into simpler carbohydrates and lipids when parthenium is turned into its vermicompost. There are also significant fragmentation, bio-oxidation and molecular rearrangements of chemical compounds in parthenium vermicompost compared to the parent substrate. In particular, parthenin, which is principally responsible for the toxicity and allelopathy of parthenium, is completely degraded by the vermicomposting of parthenium. The study opens the way to profitable use of the millions of tonnes of parthenium that are generated annually, the continued proliferation of which causes great loss of biodiversity.

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Use of earthworms (Eisenia fetida) to reduce phytotoxicity and promote humification of pre-composted olive oil mill wastewater

Abstract: The utilization of earthworms, in particular in the presence of plants, may be an ecologically sound and economically feasible technology to obtain a non-toxic, high-value product useful for agricultural purposes.

Cited by 11 publications

References 42 publications

Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization

Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization

The potential reuse of soybean husk as feedstock of Eudrilus eugeniae in vermicomposting

Transformation of the pernicious and toxic weed parthenium into an organic fertilizer by vermicomposting

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