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https://www.readbyqxmd.com/read/29151190/elucidation-of-functional-chemical-groups-responsible-of-compost-phytotoxicity-using-solid-state-13-c-nmr-spectroscopy-under-different-initial-c-n-ratios
#1
Khalid Azim, Youssef Faissal, Brahim Soudi, Claude Perissol, Sevastianos Roussos, Imane Thami Alami
More than 1 million tons of fresh organic wastes is produced in the Souss-Massa region in Morocco. Tomato organic residues represent more than 25% of the total organic wastes and are deposited in uncontrolled landfills. Thus, composting can represent a valuable and pertinent solution to this environmental problem. The objectives of this experiment are to identify the potential functional groups responsible for compost phytotoxicity and to determine the optimum initial carbon to nitrogen ratio (C/N) for maximum recovery of tomato residues...
November 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150257/utilization-of-organic-residues-using-heterotrophic-microalgae-and-insects
#2
REVIEW
Daniel Pleissner, Birgit A Rumpold
Various organic residues occur globally in the form of straw, wood, green biomass, food waste, feces, manure etc. Other utilization strategies apart from anaerobic digestion, composting and incineration are needed to make use of the whole potential of organic residues as sources of various value added compounds. This review compares the cultivation of heterotrophic microalgae and insects using organic residues as nutrient sources and illuminates their potential with regard to biomass production, productivity and yield, and utilization strategies of produced biomasses...
November 14, 2017: Waste Management
https://www.readbyqxmd.com/read/29149094/genomic-analysis-of-third-generation-cephalosporin-resistant-escherichia-coli-from-dairy-cow-manure
#3
Muhammad Attiq Rehman, Xianhua Yin, Dion Lepp, Chad Laing, Kim Ziebell, Guylaine Talbot, Edward Topp, Moussa Sory Diarra
The production of extended-spectrum β-lactamases (ESBLs) conferring resistance to new derivatives of β-lactams is a major public health threat if present in pathogenic Gram-negative bacteria. The objective of this study was to characterize ceftiofur (TIO)- or cefotaxime (FOX)-resistant Escherichia coli isolated from dairy cow manure. Twenty-four manure samples were collected from four farms and incubated under anaerobic conditions for 20 weeks at 4 °C or at 25 °C. A total of 37 TIO- or FOX-resistant E. coli were isolated from two of the four farms to determine their susceptibility to 14 antibiotics...
November 17, 2017: Veterinary Sciences
https://www.readbyqxmd.com/read/29147640/robinsoniella-peoriensis-infection-related-to-right-femoral-hardware
#4
Justin Schmetterer, Joseph Gorvetzian, Shaun Yang
Discovered in swine manure relatively recently, Robsinoniella peoriensis is a gram-positive anaerobic bacilli that has been reported to cause human infections. Its antimicrobial susceptibility, epidemiology and overall pathogenicity are still not fully understood. We report a case of a hardware related soft tissue infection in the right femur caused by Robinsoneilla peoriensis following an open reduction internal fixation in a 67 year old immunocompetent woman. The patient was successfully treated with six weeks of ertapenem...
2017: IDCases
https://www.readbyqxmd.com/read/29146964/effects-of-waste-sources-on-performance-of-anaerobic-co-digestion-of-complex-organic-wastes-taking-food-waste-as-an-example
#5
Xingang Lu, Wengang Jin, Shengrong Xue, Xiaojiao Wang
Few studies have addressed how to blend wastes for anaerobic co-digestion. This study investigated the effects of waste sources on anaerobic co-digestion (AcoD) performance, by varying the quality of food wastes (FWs) from six sources in Xi'an region, China that were individually co-digested with pre-treated corn straw and cattle manure. These effects were analysed in terms of their volatile solid (VS) ratios, C/N ratios, and the chemical composition of the FWs. The results indicated that the VS ratios were not suitable as a common mixture method because the VS ratios at which the best methane potentials occurred differed significantly among the six FW groups...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140644/evaluation-of-low-cost-hydrogen-sulfide-monitors-for-use-in-livestock-production
#6
Jessica M Beswick-Honn, Thomas M Peters, T Renée Anthony
Direct-reading gas monitors warn workers of the risk of potentially fatal hydrogen sulfide (H2S) exposures that may arise during manure handling. Low-cost, low-maintenance H2S monitors are available from many manufacturers, but differences in their features and performance make selection challenging for farmers. Moreover, little information is available on the practical maintenance and performance of these devices in agricultural environments. The objective of this study was to provide information to agricultural workers to aid in the selection, maintenance, and use of low-cost H2S monitors...
November 20, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29140615/operator-exposure-to-hydrogen-sulfide-from-dairy-manure-storages-containing-gypsum-bedding
#7
Eileen E Fabian-Wheeler, Michael L Hile, Dennis J Murphy, Davis E Hill, Robert Meinen, Robin C Brandt, Hershel A Elliott, Daniel Hofstetter
Dairy manure storages containing gypsum-based bedding have been linked anecdotally with injury and death due to presumed dangerous levels of gases released. Recycled gypsum products are used as a cost-effective bedding alternative to improve animal welfare and provide agronomic benefits to manure recycled back to the land. Sulfur contained in gypsum (calcium sulfate) can contribute to hydrogen sulfide (H2S) gas formation under the anaerobic storage conditions typical of dairy manure slurry. Disturbance of stored manure during agitation releases a burst of volatile gases...
January 26, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29139074/excessive-use-of-nitrogenous-fertilizers-an-unawareness-causing-serious-threats-to-environment-and-human-health
#8
Moddassir Ahmed, Muhammad Rauf, Zahid Mukhtar, Nasir Ahmad Saeed
Farmers occasionally need to add nitrogen fertilizer to their farms and gardens to make available just the precise nutrients for their plants' growth. The applications of inorganic nitrogen fertilizers to various crops have been continuously increasing since last many decades globally. Although nitrogen fertilizer contributes substantially to yield enhancement, but excessive use of this manure has posed serious threats to environment and human health. Rate of nitrogen fertilizers application has a close relationship with nitrate accumulation in surrounding environment, groundwater, as well as leafy and root vegetables...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29137887/effects-of-chlortetracycline-on-the-fate-of-multi-antibiotic-resistance-genes-and-the-microbial-community-during-swine-manure-composting
#9
Zhiqiang Chen, Yao Wang, Qinxue Wen
Excessive use of antibiotics in breeding industry leads to accumulation of antibiotic residuals and antibiotic resistance genes (ARGs) in environment from improperly treated livestock excrements. Four commonly used veterinary antibiotics including chlortetracycline (CTC), sulfamerazine (SMZ), enrofloxacin (ENR) and erythromycin (ERY) were monitored in the swine manure composting. Co-resistance and cross-resistance effects among relative ARGs, correlations between ARGs and bacterial community under multiple antibiotics residual during the composting were investigated in this research...
November 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29136375/a-modified-sample-preparation-approach-for-the-determination-of-the-phenolic-and-humic-like-substances-in-natural-organic-materials-by-the-folin-ciocalteu-method
#10
Ludovico Pontoni, Antonio Panico, Alessia Matanò, Eric D van Hullebusch, Massimiliano Fabbricino, Giovanni Esposito, Francesco Pirozzi
A novel modification of the Folin-Ciocalteu colorimetric assay sample preparation for the determination of total phenolic compounds in natural solid and semi-solid organic materials (e.g., foods, organic solid waste, soils, plant tissues, agricultural residues, manure, etc.) is proposed. In this method the sample is prepared by adding sodium sulfate as solid diluting agent before homogenization. The method allows the determination of total phenols (TP) in samples with high solids content, and it provides good accuracy and reproducibility...
November 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29133838/fungal-networks-serve-as-novel-ecological-routes-for-enrichment-and-dissemination-of-antibiotic-resistance-genes-as-exhibited-by-microcosm-experiments
#11
Rashid Nazir, Ju-Pei Shen, Jun-Tao Wang, Hang-Wei Hu, Ji-Zheng He
Antibiotic resistance genes (ARGs) in the environment and their subsequent acquisition by clinically important microorganisms are a serious concern. However, the spread of environmental ARGs remain largely unknown. We report, for the first time, the involvement of soil fungi in the distribution of bacteria with ARGs via soil microcosms. qPCR assay detected unique ARGs specifically found in the mycosphere of different fungi. Interestingly, the taxonomically and ecologically different fungi exerted different selection pressures on ARGs originating from the same source...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133027/nutrient-analysis-of-kunapa-jala-and-pancha-gavya-and-their-evaluation-on-germination-of-ashwagandha-withania-somnifera-dunal-and-kalamegha-andrographis-paniculata-nees-seeds-a-comparative-study
#12
Gireesh M Ankad, Jagadishchandra Hiremath, R T Patil, H J Pramod, Harsha V Hegde
BACKGROUND: Vrikshayurveda, an ancient science of plant life described by Surapala, deals with healthy growth and productivity of plants, which has clearly outlined a systematized agricultural practice that insisted the use of Kunapa jala (KJ) and Pancha gavya (PG). OBJECTIVE: An experiment was conducted to validate KJ and PG by nutrient analysis and their effect on the germination parameters of Ashwagandha and Kalamegha seeds in comparison with other treatment groups...
November 10, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29131711/aerobic-treatment-of-swine-manure-to-enhance-anaerobic-digestion-and-microalgal-cultivation
#13
Dominic Bekoe, Lijun Wang, Bo Zhang, Matthew Scott Todd, Abolghasem Shahbazi
Aerobic treatment of swine manure was coupled with anaerobic digestion and microalgal cultivation. A 14-day aerobic treatment reduced the total solid content of swine manure by >15%. Ammonia and carbon dioxide were stripped by the air supplied, and this off-gas was further used to aerate the culture of Chlorella vulgaris. The microalgal growth rates in Bristol medium and the wastewater with the off-gas increased from 0.08 to 0.22 g/L/d and from 0.15 to 0.24 g/L/d, respectively. Meanwhile, the aerobically treated swine manure showed a higher methane yield during anaerobic digestion...
November 13, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29129287/can-agricultural-practices-that-mitigate-or-improve-crop-resilience-to-climate-change-also-manage-crop-pests
#14
REVIEW
Ebony G Murrell
Sustainable agricultural practices that are promoted for mitigating climate change have the potential to also improve pest management. The author highlights recent studies that demonstrate effects of climate-mitigating agricultural practices on arthropod pests and predators in agronomic cropping systems. Promising practices for suppressing pests and/or improving biological control include: plant species diversification, especially via the addition of perennial species; cover cropping; tillage practices that retain crop residue; application of organic fertilizers such as compost and manure; and water management practices such as irrigation and sustainable rice intensification...
October 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/29128767/biochar-alleviates-phytotoxicity-in-ficus-elastica-grown-in-zn-contaminated-soil
#15
Abhay Kumar, Ludmila Tsechansky, Beni Lew, Eran Raveh, Omer Frenkel, Ellen R Graber
Zinc (Zn) immobilization by two distinct biochars in soil, together with concomitant alleviation of phytotoxic responses in Ficus elastica Roxb. ex Hornem., were examined. Rooted cuttings of F. elastica were grown in 880mgkg(-1) Zn-spiked sandy soil amended with grain husk (GH) or cattle manure (CM) biochar at 0, 10, 30 and 50gkg(-1) soil for a period of 6months. Addition of both GH and CM biochars had significant positive impacts on physiological parameters such as plant growth, leaf relative water content, photosynthetic pigments and leaf gas exchange characteristics...
November 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29128120/effects-of-agricultural-land-use-on-dissolved-organic-carbon-and-nitrogen-in-surface-runoff-and-subsurface-drainage
#16
Noora Manninen, Helena Soinne, Riitta Lemola, Laura Hoikkala, Eila Turtola
Dissolved organic carbon (DOC) load in discharges from cultivated soils may have negative impacts on surface waters. The magnitude of the load may vary according to soil properties or agricultural management practices. This study quantifies the DOC load of cultivated mineral soils and investigates whether the load is affected by agricultural practices. Discharge volumes and concentrations of DOC and dissolved organic nitrogen (DON) were continually measured at three sites from surface runoff and artificial subsurface drainage or from combined total discharge over a two-year period (2012-2014)...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127925/relationship-between-maturity-and-microbial-communities-during-pig-manure-composting-by-phospholipid-fatty-acid-plfa-and-correlation-analysis
#17
Jishao Jiang, Hua Huang, Yimei Huang, Xueling Liu, Dong Liu
The dynamic of microbial community plays vital role during composting. We therefore conducted a combined study on the maturity of compost (by pig manure composting with covering matured compost) and the successions of microbial communities (via phospholipid fatty acid (PLFA)). Our results showed that pH, electrical conductivity (EC), NH4-N, and germination index (GI) were suitable indicators for compost maturity evalument. In addition, there was a closer correlation between maturity indexes (NH4-N and GI) and the microbial compositions (as evaluated by microbial PLFA)...
November 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29127636/release-of-nutrients-and-heavy-metals-from-biochar-amended-soil-under-environmentally-relevant-conditions
#18
Yinghao Zhao, Ling Zhao, Yanyan Mei, Feiyue Li, Xinde Cao
Biochar is a potential amendment for improving soil fertility due to its richness of nutrients, P, K, Ca, and Mg. However, soil amended with metal-rich biochars may pose a risk of heavy metal release to the environment. Biochars derived from pig manure and sewage sludge (PM-biochar and SS-biochar) were investigated for their nutrient and heavy metal release in two soils (acidic and alkaline soil) under simulated landfill and acid rain conditions. Results showed that under both environmental conditions, adding PM-biochar into the soil increased K, P, and Mg release significantly by about 40-50 times, while only 2-4 times increase of the nutrients was observed in the SS-biochar-amended soil...
November 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29126822/blending-based-optimisation-and-pretreatment-strategies-to-enhance-anaerobic-digestion-of-poultry-manure
#19
Ivan Rodriguez-Verde, Leticia Regueiro, Juan M Lema, Marta Carballa
Anaerobic digestion of poultry manure is limited by the excessive levels of nitrogen and the high concentration of dry matter. These limitations are usually overcome either by applying procedures to remove nitrogen or by employing pretreatments that allows to solubilise organic matter. In this work, the treatment of poultry manure was enhanced by co-digestion with pig manure through the methodological determination of optimal mixtures combined together with a thermochemical pretreatment coupled to ammonia stripping...
November 7, 2017: Waste Management
https://www.readbyqxmd.com/read/29126051/oxidation-resistance-of-biochars-as-a-function-of-feedstock-and-pyrolysis-condition
#20
Lanfang Han, Kyoung S Ro, Yu Wang, Ke Sun, Haoran Sun, Judy A Libra, Baoshan Xing
Assessing biochar's ability to resist oxidation is fundamental to understanding its potential to sequester carbon. Chemical oxidation exhibits good performance in estimating the oxidation resistance of biochar. Herein, oxidation resistance of 14 types of biochars produced from four feedstocks at different pyrolysis conditions (hydrothermal versus thermal carbonization) was investigated via hydrogen peroxide oxidation with varying concentrations. The oxidation resistance of organic carbon (C) of hydrochars was relatively higher than that of 250°C pyrochars (P250) but was comparable to that of 450°C pyrochars (P450)...
November 7, 2017: Science of the Total Environment
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