Reusing phosphate sludge enriched by phosphate solubilizing bacteria as biofertilizer: Growth promotion of Zea Mays

Benbrik, Brahim; Elabed, Alae; Modafar, Cherkaoui El; Douira, Allal; Amir, Soumia; Filali‐Maltouf, Abdelkarim; Abed, Soumya El; Gachtouli, Naima El; Iraqui, Mohammed; Koraichi, Saâd Ibnsouda

doi:10.1016/j.bcab.2020.101825

Cited by 24 publications

(11 citation statements)

References 37 publications

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“…Among the 11 bacterial genera isolated in this study, only 4 were retrieved in precedent works in phosphate mine wastes: Acinetobacter , Bacillus , Brevibacterium , and Raoultella ( Yang et al, 2012 ; Benbrik et al, 2020 ; Qarni et al, 2021 ). However, other genera such as Micromonospora , Streptomyces , Pseudomonas , Sphingobacterium , Staphylococcus , and Serratia were not identified in the present study ( Hamdali et al, 2008 , 2012 ; Yang et al, 2012 ; Benbrik et al, 2020 ; Qarni et al, 2021 ). This could be due to the isolation medium used or to the type of phosphate, and process implicated in generating these wastes.…”

Section: Discussionmentioning

confidence: 99%

“…The best performing bacteria were also tested in planta . A very limited number of studies have focused on isolating the bacterial community from phosphate wastes and they mainly studied the phosphate solubilizing activity in bacteria for their use as phosphate biofertilizers ( Hamdali et al, 2008 , 2012 ; Yang et al, 2012 ; Aliyat et al, 2020 ; Benbrik et al, 2020 ; Qarni et al, 2021 ). To our knowledge, this is one of the first studies on the effect of indigenous bacteria on plant growth for revegetation purposes of phosphate wastes.…”

Section: Discussionmentioning

confidence: 99%

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Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation

et al. 2022

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Morocco holds the vast majority of the world’s phosphate reserves, but due to the processes involved in extracting and commercializing these reserves, large quantities of de-structured, nutritionally deficient mine phosphate wastes are produced each year. In a semi-arid climate, these wastes severely hamper plant growth and development leading to huge unvegetated areas. Soil indigenous Plant Growth-Promoting Bacteria (PGPB) play a pivotal role in restauration of these phosphate mining wastes by revegetation, by increasing plants development, soil functioning, and nutrient cycling. The development of a vegetative cover above the degraded phosphate wastes, could stabilize and reintegrate these wastes in the surrounding environment. The current study’s objectives were to isolate, characterize, and identify indigenous bacterial strains, and test their PGP activity in vitro and, for the best-performing strains in planta, in order to assess their potential for acting as biofertilizers. A quantitative test for the synthesis of auxin and the production of siderophores as well as a qualitative test for the solubilization of phosphate were performed on all isolated bacterial strains. The production of hydrogen cyanide (HCN), exopolysaccharides (EPS), and enzymes were also examined. Three bacteria, selected among the best PGPB of this study, were tested in planta to determine whether such indigenous bacteria could aid plant growth in this de-structured and nutrient-poor mining soil. Using 16S rRNA gene sequencing, 41 bacterial strains were isolated and 11 genera were identified: Acinetobacter, Agrococcus, Bacillus, Brevibacterium, Microbacterium, Neobacillus, Paenibacillus, Peribacillus, Pseudarthrobacter, Stenotrophomonas, and Raoultella. Among the three best performing bacteria (related to Bacillus paramycoides, Brevibacterium anseongense, and Stenotrophomonas rhizophila), only Stenotrophomonas rhizophila and Brevibacterium anseongense were able to significantly enhance Lupinus albus L. growth. The best inoculation results were obtained using the strain related to Stenotrophomonas rhizophila, improving the plant’s root dry weight and chlorophyll content. This is also, to our knowledge, the first study to show a PGP activity of Brevibacterium anseongense.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation

et al. 2022

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“…Rhizobium can be used as inoculum to formulate biofertilizers with the capacity to induce high germination and nodulation in crops (Paliya et al, 2019). Benbrik et al (2020) explored the application of phosphate sludge (i.e., sludge generated during the treatment of phosphate rock; many of the minerals removed constitute a sludge with phosphate in the insoluble form) supplied with phosphate solubilizing bacteria (PSB) to promote Zea Mays plant growth. The synergistic interaction of the microbial consortia of PSB could improve siderophores, HCN, H 2 S, and most importantly Indol-3acetic acid production.…”

Section: Biofertilizermentioning

confidence: 99%

“…The synergistic interaction of the microbial consortia of PSB could improve siderophores, HCN, H 2 S, and most importantly Indol-3acetic acid production. It could also increase the solubility of P for easier plant uptake (Benbrik et al, 2020). The produced siderophores can also increase soil fertility and act as a biocontrol for fungal pathogens (Ali and Vidhale, 2013).…”

Section: Biofertilizermentioning

confidence: 99%

Integrated Biotechnology Management of Biosolids: Sustainable Ways to Produce Value—Added Products

Vaithyanathan

Cabana

2021

Front. Water

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Biosolids (BS) are organic dry matter produced from wastewater treatment plants (WWTPs). The current yearly worldwide production of BS is estimated to be around 100–125 million tons and is expected to continuously increase to around 150–200 million tons by 2025. Wastewater treatment industries across the globe strive to achieve a green and sustainable manufacturing base for the management of enormous amounts of municipal BS, which are rich in nutrients and organic dry matter along with contaminants. The management of these organic-rich wastes through environmentally friendly recovery technologies is a major challenge. The need to improve waste biomass disposal by biological development and develop more economically viable processes has led to a focus on the transformation of waste resources into value-added products (VAP). This paper assesses the leading disposal methods (based on volume and contaminant reduction) and reviews the state of biotechnological processes for VAP recovery from municipal wastewater sludge (untreated solid waste residual) and BS (stabilized solid waste which meets criteria for its use in land). A review of the anaerobic and aerobic digestion processes is presented to provide a holistic overview of this growing research field. Furthermore, the paper also sheds light on the pollutant reduction and resource recovery approaches for enzymes, bioflocculants, bioplastics, biopesticides, and biogas as a mean to represent BS as a potential opportunity for WWTPs. However, only a few technologies have been implemented for VAP resource recovery and a shift from WWTPs to waste resource recovery facilities is still far from being achieved.

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“…In Morocco, OMW is dumped in large quantities without any treatment, and therefore has a negative impact on natural resources and the ecosystem. Besides, Morocco has the largest phosphate reserve and is considered the second largest phosphate producer after the United States and the first exporter of phosphate and its derivatives (Aroussy et al, 2016;Benbrik et al, 2020;Haddaji et al, 2021). This production is accompanied by large quantities of phosphate waste (waste rock, phosphate sludge and tailings) that present a serious threat to the environment.…”

Section: Introductionmentioning

confidence: 99%

Bio-fertilizers issued from anaerobic digestion for growing tomatoes under irrigation by treated wastewater: targeting circular economy concept

Tallou

Aziz

Garcia

et al. 2021

Int. J. Environ. Sci. Technol.

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The authors would like to thank the research center (CEBAS-CSIC) for providing all equipment needed to conduct this work with the economic support of the research project 'Use of Advanced information technologies for Site-Specific management of Irrigation and SaliniTy with degraded water' (ASSIST) funded by SENECA Foundation on the Regional Program "SAAVEDRA FAJARDO", and the Project SHui which is co-funded by the European Union Project GA 773903 and the Chinese MOST.

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Reusing phosphate sludge enriched by phosphate solubilizing bacteria as biofertilizer: Growth promotion of Zea Mays

Cited by 24 publications

References 37 publications

Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation

Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation

Integrated Biotechnology Management of Biosolids: Sustainable Ways to Produce Value—Added Products

Bio-fertilizers issued from anaerobic digestion for growing tomatoes under irrigation by treated wastewater: targeting circular economy concept

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