Composting of sewage sludge with mole cricket: stability, maturity and sanitation aspects

Özdemir, Saim; Dede, Gülgün; Dede, Ömer Hulusi; Turp, Sinan Mehmet

doi:10.1007/s13762-018-02192-4

Cited by 17 publications

(10 citation statements)

References 27 publications

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“…Similar values of the discussed parameter were showed by Lv et al [19]. In turn, Ozdemir et al [28] reported the value range of optical density from 3.23 to 8.8 to be adequate for compost maturation. Based on this statement, the VCs and Cs analyzed in this study were well maturated.…”

Section: Resultssupporting

confidence: 80%

“…The basic assumption of biowaste composting is the possibility of reusing organic matter and nutrients contained in it. This approach to the production of biomass is consistent with the concept of circular economy and it is the most rational method of biowaste management [8,18,28]. Considering the final use of compost or vermicompost for agricultural or horticultural purposes, their quality is of greater importance, including the abundance of organic matter and the essential nutrients.…”

Section: Resultsmentioning

confidence: 52%

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Valorization of Quality of Vermicomposts and Composts Using Various Parameters

Jakubus

Michalak-Oparowska

2022

Agriculture

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Due to the increasing biomass of biowaste it is necessary to manage it rationally. This work presents comparisons and valorization of vermicomposts (VCs) and composts (Cs) prepared from various biowastes generated in households and private gardens, in terms of their practical use. The tested VCs and Cs were subjected to chemical analyses to assess the amounts of macro- (N, P, K, S, Mg, Ca, Na) and micronutrients (Fe, Zn, Mn, Cu, Ni), as well as contents of organic matter (OM), total organic carbon (TOC), humic compounds (HS) and labile and water extractable organic carbon (LC, WEOC). Moreover, humification indexes (HR, HI, DP) were determined. The amounts of macro- and micronutrients, OM, TOC, LC, WEOC were greater for vermicomposts. Regardless of these differences, both vermicomposts and composts were characterized by considerable amounts of organic matter ranging from 325 to 631 g·kg−1 and TOC amounting from 82 to 270 g·kg−1. Moreover, the tested organic fertilizers were characterized by high contents of N (7–21.5 g·kg−1), K (3.7–24.4 g·kg−1), Ca (12.2–44.0 g·kg−1), Fe (133.1–333.8 mg·kg−1) and Mn (71.5–113.8 mg·kg−1). The analyzed VCs and Cs did not exceed the permissible amounts of heavy metals (Cr, Pb) and contained a comparable amount and quality of humus compounds. The level of CHS ranged from 29.6 to 41 g·kg−1 for vermicomposts, and from 19.8 to 51.8 g·kg−1 for composts. The humification indexes indicate that VCs and Cs were well–matured despite different composting conditions. The HI values for VCs ranged from 8.3% to 10% and for Cs amounted from 12.2% to 16.8%. Similarly, the HR values were higher for composts (24.3–33%) in comparison to VCs (15.2–20.1%). Vermicomposting and composting of biowaste is economically and environmentally justified. Fertilizers obtained in the composting process are a valuable source of organic material and nutrients essential for plants and can be safely used in private gardens.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 52%

Valorization of Quality of Vermicomposts and Composts Using Various Parameters

Jakubus

Michalak-Oparowska

2022

Agriculture

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“…Taking into account that threshold, it may be assumed that only composts 2, 5, 6, 7, 8, and 10 were well matured, because the values obtained for them ranged from 2.1 to 2.8 (Table 2). Optical density expressed as Q 4/6 ranging from 3.23 to 8.8 indicated a successful maturation of composts [40]. This threshold was met by most of the composts except for C5 (9.2) and C6 (17.3) (Table 2).…”

Section: Discussionmentioning

confidence: 95%

A Comparative Study of Composts Prepared from Various Organic Wastes Based on Biological and Chemical Parameters

Jakubus

2020

Agronomy

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One of the principles of the circular economy requires the effective recycling of organic waste, especially since its volume is increasing from year to year. Therefore, one of the best solutions to solve this problem is the composting of organic waste. This paper presents the results of a comparative study of 10 different composts in terms of their quality. The composts varied with regard to waste materials used for composting, the adopted composting method, and the degree of compost maturity. Both biological (seed germination rate and intensity of plant root growth) and chemical methods (contents of macro- and micronutrients, presence of heavy metals, as well as the quality and quantity of humus compounds) were applied to evaluate the fertilisers, providing comprehensive characteristics of individual composts. It was found that composts prepared on the basis of sewage sludge had the highest contents of macro- and micronutrients as well as heavy metals. In addition, these composts contained the greatest amounts of humic substances, although these were of low quality. These composts also strongly inhibited seed germination and plant root growth. The least desirable chemical composition was found for the composts based on yard trimmings and household wastes prepared in home composters. These composts contained good quality humus compounds and had a positive effect on seed germination and plant root growth.

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“…Another parameter of interest was the electrical conductivity (EC) whose analysis showed an increase during the vermicomposting, from 593 to 1914 μS/cm. Our findings may be attributed to the mineralization of organic matter and release of different minerals salts, such as phosphate, ammonia and potassium ( Ozdemir et al., 2019 ; Suthar, 2010 ; Jadia and Fulekar, 2008 ). It should be noted that despite the increase in EC, its value remains lower than the maximum tolerance limit of plants 4.0 mS/cm, as suggested by Dede and Ozdemir (2015) .…”

Section: Resultsmentioning

confidence: 78%

“…For the effects of earthworms on sludge's organic matter, data in Table 2 showed a reduction in the vermicomposted sludge compared to the raw one. This decrease was due to the mineralization and decomposition of organic matter by earthworms-microorganisms combination in the substrate material and the loss of carbon compounds in CO 2 ( Ozdemir et al., 2019 ; Amouei et al., 2017 ).…”

Section: Resultsmentioning

confidence: 99%

The vermicomposting for agricultural valorization of sludge from Algerian wastewater treatment plant: impact on growth of snap bean Phaseolus vulgaris L.

Belmeskine

Ouameur

Dilmi

et al. 2020

Heliyon

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In the present study, vermicomposting of sewage sludges and their application in agriculture have been investigated. The impact of Eisenia fetida earthworms on the stabilization of these sludges during 7, 14 and 21 days was assessed. The final product was applied as soil amendment (set-1) to evaluate the effects on vegetative parameters (Chlorophyll, carotenoid, number of nodules, leaf weight, and plant height) of Phaseolus vulgaris.L bean. In the second test (set-2), the amendment was made with raw sludge. In the third test (set-3), the worms were added to the raw sludge at the time of spreading and left during the whole period of beans growth. In order to identify and better understand the behavior and role of worms with regard to sludge, their growth (weight and length), some pathogens and physico-chemical parameters were assessed during the vermicomposting. Results showed significant increase of earthworm weight of 10.62, 23.89 and 35.72 % after 7, 14 and 21 days of sludge vermicomposting, respectively, which explain their acclimatization . The vermicomposting caused a decrease of feacal coliforms number and organic matter (OM), an increase in electrical conductivity (EC) and stabilization in pH. Furthermore, significant differences were obtained for all plants vegetative parameters in soil amended with vermicomposts, compared to the control (unamended soil). Indeed, a significant increase of the chlorophyll level (a, b) was noted in the beans having undergone sludge spreading. However, worm-stabilized sludge for 7 days (set-1) showed the highest chlorophyll a and b levels about 16.1 and 24.64 μg/g, respectively, against 10.13 and 4.38 μg/g in the control. For the carotenoid, a significant decrease was observed compared to the control. Our experiments have also showed that the application of vermicomposted sludge significantly increases the number of nodules, leaf weight and plant height of Phaseolus Vulgaris L . snap beans .

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Composting of sewage sludge with mole cricket: stability, maturity and sanitation aspects

Cited by 17 publications

References 27 publications

Valorization of Quality of Vermicomposts and Composts Using Various Parameters

Valorization of Quality of Vermicomposts and Composts Using Various Parameters

A Comparative Study of Composts Prepared from Various Organic Wastes Based on Biological and Chemical Parameters

The vermicomposting for agricultural valorization of sludge from Algerian wastewater treatment plant: impact on growth of snap bean Phaseolus vulgaris L.

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