scholarly journals Change of physichochemical properties and heavy metals content in sewage sludge during its vermicomposting with Eisenia fetida

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Sukru Taner Azgin
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Eisenia Fetida

scholarly journals CHANGES IN THE CONCENTRATION OF HEAVY METALS (CR, CD, NI) DURING THE VERMICOMPOSTING PROCESS OF SEWAGE SLUDGE / SUNKIŲJŲ METALŲ (CR, CD, NI) KONCENTRACIJŲ KAITA NUOTEKŲ DUMBLO VERMIKOMPOSTAVIMO PROCESO METU

2014 ◽  
Vol 6 (4) ◽  
pp. 362-367
Author(s):  
Aušra Zigmontienė ◽  
Indrė Liberytė
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Eisenia Fetida ◽  
Management Strategy ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Optimal Conditions ◽  
Sewage Sludge Treatment

Sewage sludge treatment and utilization is an important issue for a biodegradable waste management strategy. Heavy metals in sewage sludge complicate its use. Vermicomposting is one of the ways to improve the characteristics of sewage sludge and to reduce the residual concentrations of heavy metals. Study on changes in the concentration of heavy metals (Chromium, Nickel and Cadmium), when vermicomposting sewage sludge, was performed using Californian earthworms (Eisenia fetida). For that purpose, 60 kg of sewage sludge from Vilnius Waste Water Treatment Plant were taken thus inserting 1.5 kg of Californian earthworms into it. Optimal conditions for work (optimum temperature, moisture, pH) for earthworms to survive were maintained in the course of the study that lasted 120 days and was conducted in June – August. The samples of sewage sludge and earthworms were taken every 10 days. The concentrations of heavy metals in sewage sludge were measured using atomic absorption spectroscopy. Nuotekų dumblo tvarkymo ir naudojimo problema – svarbi biologiškai skaidžių atliekų tvarkymo strategijos dalis. Lietuvoje kasmet susidaro apie 80 tūkst. tonų nuotekų dumblo, o didžiausia dalis šio kiekio vis dar sandėliuojama valyklų aikštelėse. Nuotekų dumblas gali būti efektyviai naudojamas žemės ūkyje, tačiau sunkieji metalai, esantys nuotekų dumble, apsunkina jo naudojimą. Vienas iš būdų pagerinti dumblo savybes ir kartu sumažinti liekamąsias metalų koncentracijas – nuotekų dumblo vermikompostavimas. Sunkiųjų metalų (chromo, nikelio ir kadmio) koncentracijų kaitos vermikompostuojant nuotekų dumblą tyrimas atliktas naudojant Kalifornijos sliekus (Eisenia fetida). Tirta sunkiųjų metalų koncentracijos kaita viso kompostavimo proceso metu. Tyrimui naudotas nuotekų dumblas (60 kg) buvo paimtas iš Vilniaus miesto nuotekų valyklos ir į jį įleista 1,5 kg Kalifornijos sliekų. Viso tyrimo metu buvo palaikomos optimalios sąlygos sliekams gyvuoti ir veikti (optimali temperatūra, drėgmė, pH). Tyrimo trukmė – 120 parų (birželio–rugpjūčio mėnesiai), dumblo mėginiai imti 10 parų intervalu. Išmatuotos ir nustatytos sunkiųjų metalų – chromo, nikelio ir kadmio – koncentracijos nuotekų dumble.

scholarly journals Bioremediation Efficiency of Heavy Metal Contaminated Soil Using Earthworm Eisenia Fetida

2020 ◽  
Author(s):  
Inesa Kniuipytė ◽  
Marius Praspaliauskas ◽  
Jūratė Žaltauskaitė ◽  
Austra Dikšaitytė
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Sewage Sludge ◽  
Adverse Effects ◽  
Organic Pollutants ◽  
Contaminated Soil ◽  
Eisenia Fetida ◽  
Forest Plantations ◽  
Survival And Growth ◽  
Living Organisms

The amount of sewage sludge (SS) used in agriculture and forest plantations is constantly growing in EU. It’s known that even after various treatment methods some of contaminants still remain. The main risks of using SS in agriculture or forestry are related with hevy metals and organic pollutants content in SS. Heavy metals tend to acumu-late in the environment and living organisms and may cause different adverse effects. Bioremediation using earthworms can be used to eliminate or mitigate the threat of heavy metals. Bioremediation is cheaper, requiries less energy and is more environmentally friendly than conventional physical or chemical remediation methods. But it’s really important to evaluate bioremediation efficiency for SS, because there is evidence that nutrients in SS might improve efficiency of bioremediation. In this study earthworms Eisenia fetida were exposed for 9 weeks to SS amended soil. Earthworm mortality, growth and heavy metals (Al, Fe) accumulation were evaluated. The results showed that SS had a highly significant effect on earthworm mortality (F=4.98; p;lt0.05) and growth (F=3.88–67.02; p;lt0.05). Both metals concentrations in soil were signifficant (p;lt0.05) lower after vermi-remediation than after SS soil amendments. SS concentration had a significant effect to Al concentration accumulated in earthworm tissue (F=33.71; p;lt0.05). This study demonstrated that bioremediation efficiency using E. fetida depends on concentrations of SS, survival and growth of earthworms.

Predicted Solution Phase Forms of Heavy Metals in Sewage Sludge‐Treated Soils

1982 ◽  
Vol 11 (2) ◽  
pp. 182-186 ◽  
Author(s):  
W. E. Emmerich ◽  
L. J. Lund ◽  
A. L. Page ◽  
A. C. Chang
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Solution Phase

Influence of rice husk addition on phosphorus fractions and heavy metals risk of biochar derived from sewage sludge

Chemosphere ◽  
2021 ◽  
Vol 280 ◽  
pp. 130566
Author(s):  
Qiao Xiong ◽  
Xiang Wu ◽  
Hang Lv ◽  
Shuhua Liu ◽  
Haobo Hou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Rice Husk ◽  
Phosphorus Fractions

Characteristic of heavy metals in biochar derived from sewage sludge

2015 ◽  
Vol 18 (4) ◽  
pp. 725-733 ◽  
Author(s):  
Tao Lu ◽  
Haoran Yuan ◽  
Yazhuo Wang ◽  
Hongyu Huang ◽  
Yong Chen
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge

scholarly journals Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 585
Author(s):  
Catalina Iticescu ◽  
Puiu-Lucian Georgescu ◽  
Maxim Arseni ◽  
Adrian Rosu ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Agricultural Production ◽  
Agricultural Land ◽  
Chemical Characteristics ◽  
Optimal Solutions ◽  
Physico Chemical ◽  
Agricultural Areas ◽  
The Impact ◽  
Made In

The use of sewage sludge in agriculture decreases the pressure on landfills. In Romania, massive investments have been made in wastewater treatment stations, which have resulted in the accumulation of important quantities of sewage sludge. The presence of these sewage sludges coincides with large areas of degraded agricultural land. The aim of the present article is to identify the best technological combinations meant to solve these problems simultaneously. Adapting the quality and parameters of the sludge to the specificity of the land solves the possible compatibility problems, thus reducing the impact on the environment. The physico-chemical characteristics of the fermented sludge were monitored and optimal solutions for their treatment were suggested so as to allow that the sludge could be used in agriculture according to the characteristics of the soils. The content of heavy metals in the sewage sludge was closely monitored because the use of sewage sludge as a fertilizer does not allow for any increases in the concentrations of these in soils. The article identifies those agricultural areas which are suitable for the use of sludge, as well as ways of correcting some parameters (e.g., pH), which allow the improvement of soil quality and obtained higher agricultural production.

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