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Bioconversion of filter mud using vermicomposting employing two exotic and one local earthworm species.

Abstract：

:Three different earthworm species Eisenia fetida, Eudrilus eugeniae and Perionyx excavatus in individual (Monocultures) and combinations (Polycultures) were utilized to compare the suitability of worm species for vermicomposting of filter mud as well as the quality of the end product. The filter mud blended with saw dust can be directly converted into good quality fertilizer (vermicompost). Eight different reactors including three monocultures and four polycultures of E. fetida, E. eugeniae and P. excavatus and one control were used for the experiment. Vermicomposting resulted in significant reduction in C/N ratio, pH, total organic matter (TOC) but increase in electrical conductivity (EC), total nitrogen (TN), total phosphorus (TP) and macronutrients (K, Ca and Na). Oxygen uptake rate (OUR) dropped up to 1.64-1.95 mg/g (volatile solids) VS/day for monoculture reactors and 1.45-1.78 mg/g VS/day for polycultures reactors, respectively, after 45 days of vermicomposting. Cocoon production and the earthworm biomass increased as vermicomposting progressed. On an overall the mono as well as polyculture reactors produced high quality stable compost free from pathogens and no specific differentiation could be inferred between the reactors.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Khwairakpam M,Bhargava R

doi

10.1016/j.biortech.2009.06.038

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

5846-52

issue

23

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(09)00699-3

journal_volume

100

pub_type

杂志文章

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