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Journal of Environmental Protection 2020年第7期11卷 531-539页

作者： Nazo Edith Kpata-Konan kouamé martin kouamé Yao Francis kouamé Sylvestre Ahou Yaovi Koffi Felix Konan Theophile Gnagne Department of Agroforestry University Jean Lorougnon Guédé Daloa C&ocirc te d’Ivoire Department of Environment University Jean Lorougnon Guédé Daloa C&ocirc te d’Ivoire IMT-Atlantique GEPEA UMR CNRS 6144 Nantes France Laboratory of Biology and Molecular Typing in Microbiology LBTMM UAC Abomey-Calavi Benin Department of Science and Environmental Management Université Nangui Abrogoua Abidjan C&ocirc te d’Ivoire

This study focused on the transfer of experimental results of anaerobic digestion of liquid waste from an attiéké (steamed cassava semolina) factory to a 6 m3 pilot digester. The experimental digester and the pilot were powered as follows: Lw + U + C (liquid waste + urine + cow dung). To the results, the experimental digester mesophilic with a progressive elimination of COD. Also, the nitrogen concentrations in the experimental reactor had little removal with alkaline pH. As for the biogas product in this digester, a volume of 3.6 m3 was obtained with a positive flammability test. The transition from the laboratory scale to the semi-industrial scale retains the results of purification and fuel biogas production of the experimental digester.

关键词： Anaerobic Digestion Cassava Liquid Waste Biogas

Qualitative Assessment and Typology of the Water Resource Used for the Production of Drinking Water in Duékoué, Western Côte d’Ivoire

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Journal of Geoscience and Environment Protection 2019年第5期7卷 212-231页

作者： kouamé Kouakou Benoit Konan Kouakou Séraphin Attoungbre Kouakou Severin Konan Koffi Félix Boussou Koffi Charles kouamé kouamé martin Laboratory of Geosciences and Environment University Jean Lorougnon Guédé Daloa C&#244 te d’Ivoire Laboratory of Ecology Biodiversity and Evolution University Jean Lorougnon Guédé Daloa C&#244 te d’Ivoire

The objective of this study was to evaluate the typology of water through physicochemical and bacteriological characterization with the aim of highlighting its vulnerability as a drinking water resource. The methodology adopted was to evaluate the level of pollution by monitoring the spatiotemporal variation of the water pollution indicator levels of Lake Dohou. The sampling frequency is monthly for one year, from November 2017 to October 2018, in order to obtain a fairly representative image of water quality and its seasonal evolution in eight (8) well-defined stations. The parameters were determined using the standard methods defined by the French Association for Standardization (AFNOR). This study shows that the waters are acidic, with an average pH of 5.81 and a low electrical conductivity of between 42.67 ± 4.30 and 59.62 ± 21.84 μ***-1. At all stations, seasonal mean water transparencies are low (<1 m). It is also noted that 99.7% of the water samples collected had total nitrogen (TN) levels above the limit of 4 mg.L-1. All of the lake’s waters have non-compliant BOD5 (2.L-1) for raw water intended for the production of drinking water. Sites D6 and D7 have COD/BOD5 ratio greater than 3, which indicates the presence of non-biodegradable organic matter in these areas. Total coliforms, Escherichia coli and Enterococci were present in 100% (28/28) water samples at concentrations ranging from 2300 to 173,000 CFU/100 mL, from 100 to 1650 CFU/100 mL and from 20 to 1140 CFU 1/100 mL respectively. For Salmonella pathogens, they were detected in 50% of the dry season samples and in 100% of the rainy season samples. This almost permanent presence of this pathogenic germ denotes a poor quality of water with reference to this parameter. The presence of total coliform and other microbial contaminants suggests that supplied water is highly contaminated with pathogens and great reservoirs for them. Principal component analysis (PCA) of the physicochemical data set allowed de

关键词： Dohou Lake Water Quality Coliform Fecal Coliform Physico-Chemical Parameters Typology and Variation

Characterization of Digestates from Anaerobic Co-Digestion of Manioc Effluent, Human Urine and Cow Dung

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Journal of Water Resource and Protection 2019年第6期11卷 777-788页

作者： Kpata-Konan Nazo Edith kouamé Yao Francis kouamé kouamé martin Konan Koffi Felix Department of Agroforestry/University Jean Lorougnon Gué dé Daloa C&#244 te d’Ivoire Department of Environment/University Jean Lorougnon Gué dé Daloa C&#244 te d’Ivoire

This study focused on the characterization of digestates resulting from anaerobic digestion of manioc effluents from attiéké factories. Two types of digestate were characterized, one consisting of manioc effluent + urine and another composed of manioc effluent + urine + cow dung. As a result, these residues of bio-digestion rich in nutrients (NPK) can be used as agricultural fertilizer. Moreover, the determination of some microorganisms and heavy metals digestates allowed to better appreciate its fertilizing quality. These parameters remained in accordance with the quality standards of a digestate prescribed. These results show that digestates from anaerobic co-digestion of manioc effluents, urine and cow dung can be used without fear as an agricultural biofertilizer.

关键词： Manioc Effluent Human Urine Cow Dung Anaerobic Co-Digestion Digestate

Edible Ectomycorrhizal Mushrooms Russula spp. of Côte d’Ivoire: Total Phenolic Content, HPLC-Profiles of Phenolic Compounds and Organic Acids, Antioxidant Activities

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Journal of Agricultural Chemistry and Environment 2016年第2期5卷 73-84页

作者： kouamé Appolinaire Kouassi Eugène Jean Parfait Kouadio Kouakou martin Djè Ahipo Edmond Dué Lucien Patrice kouamé Laboratoire de Biocatalyse et des Bioprocédés UFR des Sciences et Technologie des Aliments Université Nangui Abrogoua (Ex Université d’Abobo-Adjamé) Abidjan C&ocirc te d’Ivoire

The aim of this study was to investigate the phenolic compounds content, HPLC-profiles of phenolic compounds and organic acids, and also antioxidant activities via the ability to scavenge DPPH radical of three wild edible mushrooms belonging to Russula genus and being collected in center of Côte d’Ivoire. Total phenolic compounds, flavonoids and tannins contents of methanolic extracts were assessed by colorimetric assays. So, the obtained values of these chemical parameters ranged from 394.05 to 513.50 mg/100 g DW, 94.50 to 139.95 mg/100 g DW and from 124.20 to 165 ± 0.54 mg/100 g DW, respectively. Otherwise, HPLC-profiles of the methanolic extracts revealed that quercetin, salicylic acid and tannin ol were the main phenolic compounds in R. delica whereas R. lepida contained gallic acid, catechin and protocatechuic acid as main phenolic compounds. Besides, it showed that the phenolic compounds such as salicylic acid, tannin ol and catechin were observed in R. mustelina. As for HPLC-profiles of organic acid, the fumaric and malic acid were recorded as the main organic acids in the three species of wild edible mushrooms. However, citric acid content was found to be highest in R. lepida. The methanolic extracts of the three mushrooms exhibited high DPPH radical scavenging activities ranging from 74.92% to 58.92%. These wild edible mushrooms could be considered a potential supply source of adequate natural antioxidant for local population.

关键词： Ectomycorrhizal Mushrooms Côte d’Ivoire Phenolic Compounds Organic Acids DPPH Scavenging Activities