Soumia Amir

• Professor
• Professor at FST/Innovation City Cadi Ayyad University

This work was carried out to study the synergetic effect of phospho-compost and phosphate-laundered sludge combined or not with consortia of arbuscular mycorrhizal fungi (AMF) on the growth parameters and yield of bean plants. The results showed that the highest plant length, number of leaves, flowers, and pods were noted in plants from substrates...

Phosphorus (P) is a vital limiting nutrient element for plant growth and yield. In Morocco, the natural phosphate rock extractions generate significant amounts of phosphate wash sludge (PS), which could be reused productively, thus creating another added value for farmers. The present study aimed to demonstrate the combination effect of soil amendm...

One of the most restricting macronutrients for crop yield worldwide is phosphorus, which is often less than 1% of the total amount contained in soils. To promote its bioavailability, there are microorganisms considered vital that can solubilize and mineralize their pools in soils. In the current study, we assessed the potential of phosphate-solubil...

PurposeMining activities generate considerable quantities of wastes that are usually accumulated in the open air, and form dykes that disfigure the landscape and arable land. The present study aims to isolate and select the phosphate solubilizing bacteria (PSBs) from Phosphate Solid Sludge to improve the agronomic efficacy of phosphate bio-fertiliz...

Biorefinery for bio-waste (BW) is now a much-needed strategy for a sustainable energy transition. Although this technology allows for the production of biofuels, biochemicals and biomaterials, its large-scale transportation still suffers from several impeding factors. The instability and incomplete conversion of residues and by-products in some bio...

The aim of this work is to identify and count antimicrobial resistance (AMR) in hospital effluents (HEs) of 2 units of the University Hospital Mohamed VI the Mother and Child Hospital (MCH) and the Ar-razi Surgical Hospital (ArzH), and to compare the two hospital units in terms of ARMs and seasonal variation. Each HE was sampled during 2016 and 201...

This study aims to evaluate the effectiveness of Pinus halepensis inoculated with the ectomycorrhizal fungi spores belonging to Scleroderma in phytoremediation of polymetallic soil. Tailings were collected in the Kettara polymetallic abandoned mine in southern Morocco and diluted with sand in the following proportions, 10%, 25%, 50% and 75%. The po...

Phosphate sludge (PS) is an industrial by-product produced in huge quantities by the phosphate beneficiation plants in Morocco. In order to valorize this by-product, it was examined for its potential use as a soil fertilizer. The physicochemical properties, elemental and mineral content, morphological structure, and component stability of raw PS we...

The study aims to evaluate the effect of endomycorrhizal inoculum (arbuscular mycorrhizal fungi), phospho-compost and phosphate sludge in single (M, PC, PS) or dual combinations (PC+M, PS+M, PS+PC) compared to agricultural and Mamora soils (A and S) on the growth, flowering, and yield of tomato plants. Among the studied treatments, the substrates con...

Composting is now at the core of the environmental policy and the circular economy as one of the best options for recycling organic waste leading to a high-value final product. However, composting organic waste suffers from several drawbacks in the resulting product, such as insufficient maturity, unstable organic matter (OM), accumulation of phyto...

Tomatoes (Solanum lycopersicum) plant were provided with bio-fertilizers issued from anaerobic digestion of olive mill wastewater without and with 1%, 5% of phosphate residues in mesophilic conditions for 25 days. 1% of raw substrates (OMW raw; OMW + 1%PR raw; olive mill wastewater + 5%phosphate residues raw; and phosphate residues) and digestates...

In the present study, we assessed the agronomic value of a formulated plant growth-promoting rhizobacteria (PGPR) consortium combined with a phosphocompost amendment in deficient soil, using three plant models (Phaseolus vulgaris, Zea mays, and Solanum lycopersicum). PGPR consortium contains four strains which have been identified as Pseudomonas sp...

The isolation and identification of beneficial bacteria from the active phase of composting is considered to be a key bio-quality parameter for the assessment of the process. The aim of this work was the selection and identification of beneficial bacteria from a co-composting experiment of vegetable waste (VW), olive oil mill waste (O 2 MW), and ph...

Phosphate sludge is considered as the main derivatives of the phosphate industry in Morocco, it is produced in huge quantities. Its management presents a big challenge for the phosphate industry. In this study phosphate solubilizing bacteria (PSB) were proposed as an innovative and ecological approach to solubilize phosphate sludge and promote plan...

Food waste was composted with three additives consisting of phosphate sludge, green waste, and olive mill waste to produce a stable compost. To determine the stability for agricultural utilization, the compost maturity was evaluated using physic-chemical parameters. The temperature of treated composts remained high in the first month of composting....

Morocco as a part of Mediterranean countries is threatened by the tremendous quantities dejected of different organic wastes. Without any treatment or management strategy, these wastes are dumped illegally in large quantities and can affect natural resources, especially soil and water. Recently, it seems that the anaerobic co-digestion method is on...

The phosphate industry is one of the main sectors of the economy of morocco. However, it generates annually millions of tons of waste especially that of phosphate sludge, which spreads over large areas to the detriment of arable land. In this study, we propose phosphate solubilizing bacteria as an innovative and ecological strategy for the solubili...

The composting of the household waste mixture enriched with phosphate residues and olive oil mill wastewater was assessed by monitoring the activity of micro-organisms during composting. During the composting process, the mixture exhibited a proliferation of actinomycetes during the thermophilic phase and during the maturation phase. Their quantiti...

The aims of this study are the vulnerability assessment of an aquifer in a semi-arid environment, perimeter irrigated of Tadla plain. The vulnerability determined by two different methods: the DRASTIC and the SI methods. In the Drastic method, seven parameters of the model used to calculate the intrinsic vulnerability index and the vulnerability sp...

The exploitation of phosphate mines generates an important quantity of phosphate sludge that remains accumulated and not valorized. In this context, composting with organic matter and rhizospheric microorganisms offers an interesting alternative and that is more sustainable for agriculture. This work aims to investigate the synergetic effect of arb...

The world now is looking for alternative resources of energy instead of using fossil fuels that contribute to the greenhouse gases and that are in depletion. This energy must be renewable and environment eco-friendly. The huge amounts of organic waste produced every year imposes to seek for a new approach and new methods to manage these tremendous...

To ensure sustainable management of limiting soil P and minimize the extensive use of mineral fertilizers, friendly environmental agricultural practices are required. In this study, the effects of phospho-compost and phosphate sludges either alone or combined with an endomycorrhizal inoculum were tested on the growth parameters of maize plants. Gre...

The number of infectious propagules of arbuscular mycorrhizal fungi (AMF) in phosphate sludge was estimated using the most probable number (MPN) method, and compared with the results obtained by wet sieving techniques and the technique of staining roots. In the sludge soils of phosphates D, C, E, Bassin F and the rhizosphere soils of olive trees, a...

Objective: The objective of this study is to know the diversity of arbuscular mycorrhizal fungi in the soil sites adjacent to Khouribga phosphate mines (Morocco) Methods: Soil samples were collected from two localities, Hattaneand Merah Lahrach, in Khouribga Region (Morocco) nearby two operated sites of phosphates extraction. Five samples were rand...

Arbuscular mycorrhizal fungi to have been sought in the sludge of phosphates and various plant species of the region of Khouribga (Morocco). The density of spores of mycorrhizal fungi in phosphates sludge is low, ranging from 43 and 4 spores / 100 g soil. Some species are specific, case of Glomus aureum encountered at the level of the 1.5 basin; wh...

During the phosphate beneficiation by a chain of treatment processes, the phosphate sludge rejected with huge quantities and spread in arable land. The composting is a promising way to enhance the agronomic value of the phosphate sludge, for this reason, our objective in this study is to investigate the potential of the phosphate sludge taken from...

An attempt was made to find whether or not the quality of ground water in the areas of study suitable for human consumption. Ground water samples were collected from wells in different locations within a radius of 25 km of Beni mellal city. These water samples taken from 10 sampling points in each one of 4 areas were analyzed for their physicochemi...

Changes in the structural composition of fulvic acids were followed during composting of tannery solid waste after neutralization of its acidity by ammonium or by lime. Different techniques (elemental analysis, Fourier transform infrared (FTIR), 13C-NMR spectroscopy) were applied. During both trials of composting, a decrease of carbon and increase...

In the present paper, Thermochemolysis (or Thermally Assisted Hydrolysis/Methylation) is used as a way of following the biotransformation of organic matter during composting of solid wastes from traditional tanneries. The qualitative analysis of the pyrograms allowed us to discriminate between four main families of compounds: aromatic compounds, li...

Au Maroc à l’instar de tout les pays en voie de développement, la gestion des déchets solides en général, et celle des déchets solides ménagers en particulier, fait partie des préoccupations essentielles, avec une production qui dépasse 0.76 Kg/jour/habitant. La gestion des déchets ménagers est le souci majeur de toutes les collectivités des villes...

Notre étude concerne le suivi et l'analyse spatiale d'un certain nombre de paramètres physico-chimique des eaux de puits situés à différentes distances de la décharge contrôlée de la ville de Khouribga (So station amont, Sl-, 52 et 53 sont à 5.5, 6.5 et 1L Km après la décharge de la ville respectivement). L'absence d'une source d'alimentation en ea...

Abstract: Our study focuses on monitoring the spatial evolution of a number of physico-chemical parameters of wells waters located at different distances from the discharge of the city of Khouribga (S0 upstream station, S1, S2 et S3 are respectively located at 5.5, 7.5, 11 Km away from solid waste discharge of the city). The absence of a source of...

Résumé: 150 échantillons d’olives vertes de table prélevés dans le marché traditionnel dans la région Marrakech-Tensift El Hawz du Maroc sont évalués pour leur qualité hygiénique. Dans chaque zone, plusieurs échantillons sont analysés pour leurs propriétés physico-chimiques et microbiologiques. Les examens microbiologiques y révèlent la présence de...

A field trial in a semi-arid climate was carried out on wheat (Triticum aestivum var. Marchouch) growing on a calcimagnesic soil using compost applied at 42 T/ha during the three years of the study, but in different ways: C1, C2 and C3. Over this period, the level of total Kjeldhal nitrogen (TKN) increased in soil amended by high doses (C2 and C3,...

A field trial in a semi-arid climate was carried out on wheat (Triticum aestivum var. Marchouch) growing on a calcimagnesic soil using compost applied at 42 T/ha during the three years of study, but in different ways: C1, C2 and C3. Over this period, the level of total Kjeldhal nitrogen (TKN) increased in the soil amended by high doses (C2 and C3,...

A field trial in a semi-arid climate was carried out on wheat (Triticum aestivum var. Marchouch) growing on a calcimagnesic soil using compost applied at 42 T/ha during the three years of study, but in different ways: C1, C2 and C3. Over this period, the level of total Kjeldhal nitrogen (TKN) increased in the soil amended by high doses (C2 and C3,...

Phospholipid fatty acids (PLFAs) were analysed at different time periods during composting of two waste mixtures rich in fats, M1 (22%) and M2 (39%), with the aim of monitoring changes in microbial community structure. The two mixtures consisted of a sludge sample collected from a vegetable oil refinery effluent treatment plant combined with househ...

Phospholipid fatty acids (PLFAs) were analysed at different time periods during composting of two waste mixtures rich in fats, M1 (22%) and M2 (39%), with the aim of monitoring changes in microbial community structure. The two mixtures consisted of a sludge sample collected from a vegetable oil refinery effluent treatment plant combined with househ...

The humic acids extracted from a compost of activated sludge at different stages of maturity were characterized by various chemical techniques. Elemental analysis showed the reduction of H, and the H/C and C/N ratios and an increase in the proportion of N and S. At the end of composting C% and O% presented the same values as initially, although the...

The humic acids extracted from a compost of activated sludge at different stages of maturity were characterized by various chemical techniques. Elemental analysis showed the reduction of H, and the H/C and C/N ratios and an increase in the proportion of N and S. At the end of composting C% and O% presented the same values as initially, although the...

The humic acids extracted from a compost of activated sludge at different stages of maturity were characterized by various chemical techniques. Elemental analysis showed the reduction of H, and the H/C and C/N ratios and an increase in the proportion of N and S. At the end of composting C% and O% presented the same values as initially, although the...

The level and fate of 16 polycyclic aromatic hydrocarbons (PAHs), targeted by the US Environmental Protection Agency (USEPA), has been studied over 90 days of composting of activated sludge with green waste, under a semi-arid climate. The total PAH calculated from the sum of the amounts of the 16 PAHs in the initial mixture of activated sludge and...

Sludge resulting from the treatment of effluent from a vegetable oil mill, was composted mixed with domestic waste in a pile for five months. Different proportions of sludge and dry waste were mixed: M1 (1v/2v) and M2 (1v/1v). Monitoring different physical-chemical parameters showed the effect of the substrate on the microbiological activity and on...

The co-composting of olive oil mill wastes and household refuse was followed for 5 months. During the thermophilic phase of composting, the aerobic heterotrophic bacteria (AHB) count, showed a significant rise with a slight regression of fungal biomass. In the same way, phospholipid fatty acids PLFAs common in bacteria, showed a significant increas...

In Marrakech, solid by-products from tanneries are highly polluting, generating large amounts of nitrogenous and organic matter. In the present study composting is tested as a cost-effective method for waste management to overcome many of the environmental hazards and produce a stable, rich material for soil fertilization. Two composting trials wer...

The starting fulvic structures isolated from an initial mixture of activated sludge and plant matter presented abundant peptide structures and hydrocarbons that absorb in FTIR spectra around (1650 and 1560 cm(-1)) and 1072 cm(-1), respectively. They also present a high resonance signal in the O- and N-alkyl areas of (13)C NMR spectra. As composting...

The composting process involves a succession of different communities of microorganisms that decompose the initial material, transforming it into a stable final product. In thiswork, the levels of phospholipid fatty acid (PLFA), neutral lipid fatty acid (NLFA) and sterolwere monitored in compost versus time, as indicators of the activity of various...

Thermochemolysis coupled with gas chromatography and mass spectrometry were applied to determine the chemical structure of fulvic acids (FA) extracted from a sewage sludge and straw mixture at different steps of composting. The FA starting structures were composed mainly of mono-, di- and tri-methoxy (alkyl) benzoic acids representing lignin deriva...

Thermochemolysis coupled with gas chromatography and mass spectrometry were applied to determine the structure of humic acids (HA) extracted from a sewage sludge and straw mixture at different steps of composting. The HA extracted from sludge mixture released various compounds, such as mono-, di-, tri-methoxy (alkyl) benzene and (alkyl) benzoic aci...

Thermochemolysis coupled with gas chromatography and mass spectrometry were applied to determine the structure of humic acids (HA) extracted from a sewage sludge and straw mixture at different steps of composting. The HA extracted from sludge mixture released various compounds, such as mono-, di-, tri-methoxy (alkyl) benzene and (alkyl) benzoic aci...

When a mixture of thick sewage sludge (10m3) and green waste (5m3) was composted, the thermogenic phase (72 1C) improved the hygiene of the final product. After 135 days of composting, overall ecomposition reached 60%, with percentage decomposition of hemicellulose, cellulose and lignin 70%, 61% and 37%, respectively. The C/N ratio was 12 and the N...

Aerobic digestion of olive mill waster-water (OMW) has been conducted under various medium conditions to determine the best treatment involving good stabilisation and maturity of these residues. Analysis by various chemical methods of elemental analysis, FTIR and 13C NMR spectroscopies show the high content of raw olive mill waster-water of the les...

Structural changes in humic acids (HAs), extracted after lipid removal from sewage sludge during composting, were investigated using various chemical methods (elemental analysis, Fourier transform infrared spectroscopy and 13C-nuclear magnetic resonance (NMR) spectroscopy). Compared to non-purified HAs, lipid-free HAs (LFHAs) exhibit higher C and N...

The major limitation of soil application of sewage sludge compost is the total heavy metal contents and their bioavailability to the soil-plant system. This study was conducted to determine the heavy metal speciation and the influence of changing the physico-chemical properties of the medium in the course of composting on the concentrations, bioava...

Among the phthalic acid esters (PAEs) targeted by the United States Environmental Protection Agency (USEPA) as priority pollutants, diethyl- hexyl phthalate (DEHP) is the major pollutant identified at high concentration level in lagooning sludge (LS), at about 28.67 mg/kg, and in activated sludge (AS), at about 6.26 mg/kg. Other phthalic acid ester...

Changes occurring in the chemical structure of fulvic acids extracted from composted sewage sludge at different times of treatment were investigated by various chemical methods (elemental analysis, Fourier transform infrared and carbon-13 nuclear magnetic resonance). The starting material was composed of aromatic structures, carbohydrates, polyalco...

Le suivi des transformations du mélange boues de lagunage-paille pendant le compostage par différents paramètres physico-chimiques et d'humification et par spectroscopie FTIR permet de caractériser la maturité du compost final. Bien que les teneurs en éléments traces métalliques (Cu, Zn, Pb, Ni...) soient faibles et que moins de 2 % soient potentie...

The fate of 16 polycyclic aromatic hydrocarbons (PAHs), targeted by the USEPA agency, has been investigated during composting of lagooning sludge. Composting shows efficient decrease of the content and the bioavailability of each PAH. Biodegradation and sorption are suggested as the main mechanisms contributing to this decrease. During the stabiliz...

The effect of composting on the chemical structure of humic acids extracted from a mixture of sewage sludge and straw at different times of treatment was investigated by elemental analysis, Fourier transform infrared and carbon 13-nuclear magnetic resonance. The starting material was composed of a heterogeneous mixture of etherified aromatic struct...

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The molecular weight of humic acids extracted from sewage sludge at different stages of composting is estimated by separation on Sephadex gel. The two types of fractions obtained are characterized by Fourier Transform Infrared, Ultraviolet-Visible spectroscopy, and the E4/E6 ratio. The fraction of high molecular weight excluded from the gel largely...

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