Browsing by Author "Addico, G.N.D."
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Item Advanced treatment of food processing effluent by indigenous microalgae-bacteria consortia: Population dynamics and enhanced nitrogen uptake(Algal Research, 2023) Amadu, A.A.; Abbew, A-W.; Qiu, S.; Addico, G.N.D.; Hodgson, I.; Hodgson, I.; Duodu, S.; Appiah, S.A.; Ge, S.The potential of indigenous microalgae-bacteria consortia (IMBC) to recover nutrients from food processing effluents (FPE) supports the basis for advanced effluent polishing and value-added biomass generation. In this study, the effluent polishing potential of an FPE-borne IMBC treating FPE and synthetic wastewater (SWW) was investigated regarding nutrient, coliform bacteria, and chemical oxygen demand (COD) removal as well as the IMBC species evolution, and pigment production. Species evolution and diversity of the IMBC in FPE and SWW were influenced by nitrogen levels (3.83 mg/L and 32.61 mg/L NH4 +, respectively). More blue-green microalgae were observed in SWW (0.96 mg/L phycocyanin) whilst diatoms dominated in FPE (0.05 mg/L phycocyanin). Total coliform bacteria removal influenced COD reduction and this had a significant effect on dissolved oxygen production. The study offers new insights into the feasibility of using IMBC biofilm for advanced FPE polishing and nutrient recovery (0.98 mg/L NH4 +, 0.85 mg/L PO4 3− , 0.84 mg/L COD, 3.2 g/L protein, and 2.8 g/L carbo hydrates), demonstrating that it is possible to use IMBC biofilm for post-treatment of FPE, removing the residual N and P to prevent eutrophication.Item A review of biopolymer (Poly-β-hydroxybutyrate) synthesis in microbes cultivated on wastewater(Science of the Total Environment, 2021) Amadu, A.A.; Qiu, S.; Ge, S.; Addico, G.N.D.; Ameka, G.K.; Yu, Z.; Xia, W.; Abdul-Wahab, A.; Shao, D.; Champagne, P.The large quantities of non-degradable single use plastics, production and disposal, in addition to increasing amounts ofmunicipal and industrialwastewaters areamong themajor global issues known today. Biodegradable plastics from biopolymers such as Poly-β-hydroxybutyrates (PHB) produced by microorganisms are potential substitutes for non-degradable petroleum-based plastics. This paper reviews the current status of wastewatercultivated microbes utilized in PHB production, including the various types of wastewaters suitable for either pure or mixed culture PHB production. PHB-producing strains that have the potential for commercialization are also highlighted with proposed selection criteria for choosing the appropriate PHB microbe for optimization of processes. The biosynthetic pathways involved in producing microbial PHB are also discussed to highlight the advancements in genetic engineering techniques. Additionally, the paper outlines the factors influencing PHB production while exploring other metabolic pathways and metabolites simultaneously produced along with PHB in a bio-refinery context. Furthermore, the paper explores the effects of extraction methods on PHB yield and quality to ultimately facilitate the commercial production of biodegradable plastics. This reviewuniquely discusses the developments in research on microbial biopolymers, specifically PHB and also gives an overview of current commercial PHB companies making strides in cutting down plastic pollution and greenhouse gases.Item Spatio-temporal variations in seaweed diversity and abundance of selected coastal areas in Ghana(Regional Studies in Marine Science, 2021) Akrong, M.O.; Anning, A.K.; Addico, G.N.D.; deGraft-Johnson, K.A.A.; Adu-Gyamfi, A.; Ale, M.; Meyer, A.S.The coast of Ghana is considered the most seaweed-endowed region in West Africa, although information on the local spatial and temporal distributions and abundance of seaweed species is limited. In this study, seaweed species were sampled monthly from five coastal sites in the Central (Elmina, Komenda, Mumford) and Western (Shama and Takoradi Fisheries) Regions of Ghana during low tides from 2017 to 2019 to determine their diversity and abundance (biomass). Sampling was conducted using two (2) transect lines and quadrats (each of dimension 0.25 m2) at each site. Thirtyfive (35) taxa were identified at the five sites: 15 belonging to Rhodophyta, 11 to Chlorophyta and 9 to Phaeophyta. The Komenda site recorded the highest species diversity index of 2.06 whereas the Takoradi Fisheries had the lowest value of 0.68. Ulva fasciata, Padina durvillaei, Sargassum vulgare, Hydropuntia dentata and Hypnea musciformis were the most dominant species at the sites. A mean monthly biomass of 2.19 g dry wt m−2 was recorded for all five sites during the study period, with the greatest recorded at Takoradi Fisheries (3.53 dry wt m−2) and the least at Komenda (1.10 g dry wt m−2). The greatest biomass of the highly economic important species, H. musciformis, was recorded at Shama. The highest mean monthly biomass was recorded between August and October while the least was observed from December to February. Results from this study indicate considerable spatial and temporal variability in the diversity and abundance of seaweeds across the studied sites. These findings provide important baseline information for conservation and utilization of seaweeds, particularly their cultivation along the Ghanaian coastal waters as an alternate source of livelihood for the local communities.