Based on the theoretical knowledge of vermicomposting, a project was realized for the construction of a three-chamber domestic wooden vermicomposter, in which aerobic degradation of three types of animal excrements (cow, pig, dog) using the earthworm Eisenia andrei was carried out. Before laying the individual excrements to the compost batch, the appropriate input samples were taken for the microbiological examination of the biopathogens. After six months, final samples of the final substrate were taken to determine whether proper compost sanitization took place during the vermicomposting process; according to valid legislation, the bacteria Escherichia coli, Enterocococcus sp. and Salmonella sp. were identified as indicator micro-organisms. After the evaluation of the performed laboratory analyses, it was proved that the use of earthworm bioactivity resulted in elimination or at least significant reduction of the concentrations of these bacterial strains in the final vermicompost samples.
In industrial composting, a large scale of technological processes and devices is used which, to a certain extent, influence also the quality and characteristics of final substrates. Composts are, on the basis of the existing legislation, compared from the point of view of content of hazardous elements, qualitative characteristics, content and quality of humic substances, their impact on germination capacity and the subsequent growth of plants.
The paper deals with an application of bacterial leaching on two selected samples from old ecological loads situated in the Karlovy Vary Region. To be specific, they are heaps in Prebuz and Kraslice. Bacterial leaching was applied making use of Acidithiobacillus ferrooxidans bacteria and lasted 28 days. The results imply that the given method is suitable for the retrieval of valuable metals from waste and may help to deal with the issue of old heaps and dumps.
Abstract. During composting biodegradable waste, microbic organisms reproduce massively, most of which belong to serious biopathogens which are able to penetrate various environmental layers. Their vector species include dipterous insect (Diptera) which reaches considerable amounts in composting plant premises as well as home composting units, mainly during summer months. Therefore measures must be taken to eliminate or reduce this unwanted phenomenon (sanitisation, disinfection). For evaluating obtained results, relative abundance calculation was chosen.
Degradation of arable land can rightly be considered as one of the most serious environmental problems; therefore, detailed research is needed to examine the practical possibilities for improving soil properties. The application of compost and vermicompost substrates seems to be a very advantageous way of improving the quality of soil, which may also result in an increase in the yield of cultivated plants. At the same time, the use of compost, a product of completely natural decomposition of biowaste, as a suitable organic fertilizer for arable land, is a very desirable contribution to the principles of the circulatory and recycling society.
The paper is focused on the topic of phytoremediation. The experiment included planting chosen plants (perennial ryegrass, chives and garden cress) into mixed homogenised mixture which in all cases contained substrate, compost and contaminated soil (sleeper subsoil) in ratios 60 : 20 : 20. The soil mixtures were analysed after the end of flowering. The results show that the most suitable compost was vermicompost of the brand EKOVERMES. The plants included a convenient choice of perennial ryegrass and garden cress.
The paper deals with laboratory testing of PAHs biodegradation in samples of sleeper subsoil via two chosen microorganisms, bacteria Pseudomonas monteilii and Rhodococcus degradans. The obtained results show that the pure bacterial culture R. degradans removed 46 % PAHs in 28 days. Bacterium P. monteilii was far more successful in degrading PAHs, it managed to remove 74 % PAHs. The worst result was from the mixture of both bacteria which degraded only 34 % PAHs.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.