G6AAFEU7

2272

23 décembre 2020 17:08

23 décembre 2020 17:08

With vast Modernization, high population growth rate and rapid urbanization, the production of solid waste is increasing day by day and the nature of waste is completely different from the past and solid waste management is more complex today than ever before. The conventional aerobic and physicochemical treatment processes adopted for treatment of municipal and industrial wastewater in the developed countries have sparse chances of success in developing countries due to high energy requirements, operation and maintenance costs, and constraints in stable maintenance. Thus, it has become imperative to resort to simpler alternative technologies which are natural, less mechanized and simpler in operation and maintenance. Vermiculture appears to be an innovative sustainable technology for waste treatment which holds a promising future in the field of wastewater management. Presently it is being used successfully for solid waste management. The concept of using earthworms for waste processing is not a new one. Nature has been effectively doing this since millions of years. However, the concept of harnessing this natural earthworm ecosystem for treatment of municipal and industrial wastewater is a relatively new one. Vermiculture means culturing of earthworms and it involves harnessing an entire ecosystem consisting of earthworms, beneficial bacteria and plant root zone for treatment of wastes. Vermicomposting is one of eco-friendly process. In vermiculture, earthworms are effectively used for maximizing the growth of aerobic bacteria for waste stabilization. When organic waste applied to a soil containing earthworms, simple compounds are readily degraded by bacteria, while complex wastes are first broken down to simpler ones by enzymes produced by earthworms and are then degraded by the bacteria. Since earthworms have an aerobic gut, the predominance of' aerobic bacteria harbored by earthworms ensures maximum energy utilization resulting in more biomass production, which in turn speeds up waste decomposition to a higher rate. Plants and biosoil also play important role in vermiculture. While plants absorb the metabolites of earthworms and bacteria, biosoil is the medium for activities of bacterial earthworms and plants. Soil particles serve as the grinding medium for earthworm and supply plant nutrients. Vermicastings are the excreta of earthworms, rich in bacteria and plant nutrients. Vermicastings have beneficial effect on plant growth due to presence of micro and macro nutrients. Thus all the components are interdependent. With the above understanding the vermiculture ecosystem can be assumed to consist of earthworms, bacteria, organic matter, plants, soil and rock particles, pests, and vermicastings, each performing a distinct function. vermiculture is rightly considered as a self-designed, self-regulated, self-improve! and self-powered ecosystem.

None

• AB - Modalité bio
• earthworms
• FREDO fertilisation
• GEO Népal
• vermicompost

10/2020

1 octobre 2020