Biofertilizers and Composting Accelerators of Polluting Macrophytes of a Colombian Lake

Abstract

Composting of the macrophytes Eichhornia crassipes (water hyacinth) and Egeria densa (Brazilian elodea) has been proposed as a final disposal, following their mechanical removal in the lake Fúquene (Ubaté, Cundinamarca). Microorganisms, isolated and selected by antagonism, were evaluated as inoculants to accelerate the composting and to stimulate plant growth. In microbial biopreparations of bacteria, actinomycetes and fungi, maximum amylolytic activities were found of 2,422 U L -1 , 1,744 U L -1 and 1,426 U L -1 , respectively; cellulolytic activities of 233.2 U L -1 , 668 U L -1 and 701.4 U L -1 and proteolytic activities of 660 U mg -1 , 520 U mg -1 and 400 U mg -1 . In test of these biopreparations in windrow composting of aquatic macrophytes waste, the best result was obtained with a concentration of 2%. The assay conducted on seedlings of radish (Raphanus sativus L) under greenhouse conditions (P <0.05), using the following treatments: microbial inoculants, compost inoculated to 2%, pure or mixed with soil (1:1), peat 50% and chicken manure at 33% mixed with soil, showed that actinomycetes stimulated plant growth significantly, as did chicken manure and bacteria. Microbial inoculants role for growth, development and nutrients assimilation in radish, was evident, and also for accelerating polluting macrophytes composting process.

Extended tracking of the microbial community structure and dynamics in an industrial synthetic metalworking fluid system

“…). The bacterial concentration observed is close to the range noted in previous reports on industrial MWF systems (Virji et al ., ; Veillette et al ., ; Gilbert et al ., ) and is reminiscent of microbial loads in fermentation broths and gut/sewage samples (Quigley & Quera, ; Martinez‐Nieto et al ., ). There was a substantial microbial load (9.18 × 10 6 cells mL −1 ) even in the first sample drawn right after the DCR process at week 0, indicating that the DCR of the pit did not help eliminate the microbial contaminants.…”

Water Hyacinth Composting as a Waste Management Strategy: A Systematic Review

“…Composting with natural aeration predominates in the literature reviewed studies, representing 56%. This process differs, however, from the residue disposal method, being adopted, mainly, conical cells (Karak et al, 2014;Fan et al, 2015;Pushpa et al, 2016a;Ganesh et al, 2012;Martinez-Nieto et al, 2011;Alomia et al, 2011, Parveen andPadmaja, 2011;Umsakul et al, 2010), trapezoidals cells (Singh and Kalamdhad, 2014;Taiwo et al, 2016;Kouki et al, 2016) and rotating drums (Lu et al, 2017;Rich et al, 2018;Vishan et al, 2017;Jain et al, 2020). Half of the scientific researches with natural aeration identified feature composting time equal to or less than 60 days.…”

“…(2011) and Martinez-Nieto et al (2011) are some of the authors emphasized humidity control for composting process around 70%.…”

“…Among the products that aimed to produce in the composting of 83 articles identified, dominates the production of Organic Fertilizer (≈83%), followed by Anthropogenic soil (≈9%), Organomineral (≈5%), Pre-compost (≈2%) and Slurry (≈1%). Only 6 of the 83 researches did not used a source of organic material and/or additional mineral in composting process or after composting for production of their target product (Goyal et al, 2005;Chunkao et al 2012;Araiza et al, 2016;Martinez-Nieto et al, 2011;Packia Leksmi and Viveka, 2011;Sannigrahi and Chakrabortty, 2002).…”

“…process, as highlighted bySingh and Kalamdhad (2013a),Singh and Kalamdhad (2013b),Singh and Kalamdhad (2013c ),Karak et al (2014),,Singh and Kalamdhad (2016),Rich et al (2018). Successful measures in mitigating toxic phases of certain elements are highlighted by the several authors: reduction of toxic phases of Copper (Cu) by use of peat(Lu et al, 2017), reduction of toxic phases of Pb, Cr and others, by the use of lime Kalamdhad, 2012a, Singh; Kalamdhad, 2014c and reduction of toxic phases of Pb, Cr and others, by the use of zeolite(Singh et al, 2013a and Singh; Kalamdhad 2014a).Another problem associated with macrophytes composting refers to a difficulty of degradation and maintenance a high level of cellulose, hemicellulose and lignin, as concluded bySarika et al (2014).Song (2016), Martinez-Nieto et al (2011,Parveen andPadmaja (2011) and Alomia et al (2011) added specific microorganisms that contributed to aid in degradation Varma et al (2017). is the only author to describe the use of forced aeration process.…”