PLoS ONE, Год журнала: 2025, Номер 20(4), С. e0320923 - e0320923
Опубликована: Апрель 7, 2025
Mine closure operations aim to restore the ecosystem a near-original state. Microorganisms are indispensable for soil equilibrium and restoration. Metabarcoding was employed characterize bacterial fungal composition in pristine soils, stockpiled soils (topsoils), enriched (technosoils), revegetated (revegetated technosoils), pit ecosystems an open gold mine. Chao1 analysis revealed highest richness topsoils, followed by technosoils (-17.5%) pits (-63%). Bacterial diversity surpassed (-40%) samples, but OTUs were more abundant samples (+73.4%). The findings identified dominant microbial communities conducted comparative of shared microbiota. Dominant genera differed notably between pristine, topsoil, technosoil bacteria fungi. ecological indices’ results indicated that distinct from those revealing significant alterations during stockpiling process. showed similarity topsoil than freshly prepared technosoil, suggesting restoration is ongoing phenomenon. Microbial recover faster highlighting potential managing physicochemical parameters enhance recovery similar found soils. Runoff water contribute this rebalancing transporting microorganisms ecosystem. All exhibited differences their composition, with moisture rock representing primary axes dissimilarity. greater community complexity observed related availability nutrients, variations, possibility interaction other microbes. Pits represent extreme limit growth most microorganisms. presented research provides scientific basis future strategies improve resilience altered landscapes.
Язык: Английский
Процитировано
0Enhanced heme protein expression by ammonia-oxidizing communities acclimated to low dissolved oxygen conditions
Applied Microbiology and Biotechnology, Год журнала: 2013, Номер 97(23), С. 10211 - 10221
Опубликована: Фев. 22, 2013
Язык: Английский
Процитировано
30Biological treatment of N-methylpyrrolidone, cyclopentanone, and diethylene glycol monobutyl ether distilled residues and their effects on nitrogen removal in a full-scale wastewater treatment plant
Chemosphere, Год журнала: 2024, Номер 362, С. 142585 - 142585
Опубликована: Июнь 10, 2024
Язык: Английский
Процитировано
2Nitrogen removal from swine wastewater by combining treated effluent with raw manure
Scientia Agricola, Год журнала: 2012, Номер 69(6), С. 352 - 356
Опубликована: Ноя. 24, 2012
Effluents from swine raising can be harmful to the environment if not correctly managed. Nitrogen (N) is usually main element present at high concentrations in effluent. Since use as biofertilizer always a feasible alternative, treatment of wastewater necessary. Variations N species and water solubility make difficult expensive. Additional removal low cost via denitrification may possible by recirculating nitrified effluent barns. In this study, raw manure (RM) was homogenized with treated (TE) RM/(RM + TE) ratios 1.0, 0.9, 0.8, 0.7, 0.6, 0.5 0 order simulate effect reused on nitrogen removal. Samples were collected daily during four days analyzed for pH, oxidation-reduction potential, NH4-N, NO2-N, NO3-N chemical oxidation demand. The oxidized (NOx-N) half-life degradation estimated using linear regression. NOx-N less than one day obtained when combined thoroughly manure. It suggested that combining (e.g. reuse) simple cost-effective strategy remove wastewaters.
Язык: Английский
Процитировано
19Stable operation of microbial fuel cells at low temperatures (5–10 °C) with light exposure and its anodic microbial analysis
Bioprocess and Biosystems Engineering, Год журнала: 2013, Номер 37(5), С. 819 - 827
Опубликована: Сен. 28, 2013
Язык: Английский
Процитировано
14Design of a Green Corridor and the Revitalization of the Huatanay River, City of Cuzco, Peru—2024
Urban Science, Год журнала: 2024, Номер 8(4), С. 185 - 185
Опубликована: Окт. 22, 2024
Population growth in the last 30 years has generated an energy shortage and excessive consumption of products, generating a large percentage solid waste. Urban expansion led to significant impact on biodiversity both flora fauna. In this context, objective research is develop design for green corridor that optimizes ecological efficiency contributes revaluation Huatanay River Cuzco. The methodology used study articulated four stages: literature analysis; analysis environment through supporting data such as Climate consultant, SIGRID, GEO Peru; results where proposed project carried out; finally, conclusions discussions they are contrasted with similar bibliography. efficiently takes advantage natural resources available area, which 70% areas 30% public spaces, 13 kWh/day generated, according calculations made sector 2 botanical garden will later be replicated other sectors, derived from biodigesters lighting spaces garden. corridor, turn, aims recover function river restoration its course, reforestation banks, creation recreational areas. conclusion, revitalize different elements, among stands out.
Язык: Английский
Процитировано
1Dissolved oxygen regulation by logarithmic/antilogarithmic control to improve a wastewater treatment process
Environmental Technology, Год журнала: 2013, Номер 34(23), С. 3103 - 3116
Опубликована: Май 23, 2013
This paper presents the automation of a real activated sludge wastewater treatment plant, which is located at San Antonio Ajijic in Jalisco, Mexico. The main objective to create an on-line automatic supervision system, and regulate dissolved oxygen concentration order improve performances process treating municipal wastewater. An approximate mathematical model determined evaluate via simulations different control strategies: proportional integral (PI), fuzzy PI Logarithm/Antilogarithm (PI L/A). controlled variable input injected oxygen. Based on this evaluation, L/A controller selected be implemented process. After that, implementation, testing fully operation plant are described. With considered save energy improves effluent quality; also, monitoring done online it easily operated by users.
Язык: Английский
Процитировано
12Petroleum Refinery Stripped Sour Water Treatment Using the Activated Sludge Process
Water Environment Research, Год журнала: 2011, Номер 83(11), С. 2067 - 2078
Опубликована: Ноя. 1, 2011
A pilot study was performed over 91 days to determine if the activated sludge process could treat a segregated stripped sour water (SSW) stream from petroleum refinery. The in two periods. first period terminated after 19 days, as result of excessive bulking. elimination bulking during 70-day second is attributed operational changes, which included aerating influent oxidize reduced sulfur, adjusting pH, and adding micronutrients satisfy biological requirements. plant provided chemical oxygen demand (COD) removal up 93%. Nitrification achieved, with effluent ammonia values < 1 mg-N/L. These results indicate that direct treatment SSW possible has application full-scale refinery wastewater upgrades.
Язык: Английский
Процитировано
12Interface transmissivity and hydraulic conductivity of GCLs below poured concrete
Geosynthetics International, Год журнала: 2015, Номер 22(1), С. 48 - 69
Опубликована: Фев. 1, 2015
ABSTRACT: The performance of four geosynthetic clay liners (GCLs) used as a hydraulic barrier below concrete-lined sewage treatment lagoons was examined based on series laboratory tests aimed at measuring: (i) the lateral flow synthetic wastewater through interface between each GCL product and 0.1 m thick cast-in-place concrete above over 14-month period and, from this data, calculating concrete/GCL transmissivity (θ); (ii) conductivity (k) GCLs poured when exposed to (iia) under isothermal conditions, or (iib) wet–dry and/or cool–heat cycles for up 12 months. have either sodium polymer-enhanced bentonite, granular powdered bentonite. When head 1.0 (stress concrete, σ = 10 kPa), θ with bentonite 4 × −11 2 /s. For same GCL, increased 2.5 (σ 25 value reduced by about one order magnitude −12 which has similar (and possibly lower than) that untreated cover geotextile impregnated 1280 g/m values were −13 /s head, respectively. With reduction in amount 840 , 1 9 lowest k (3.2 m/s) conditions measured whereas highest (1.9 −10 standard Under 0.5 3 kPa stress, 1.2–2.6 times conditions. Analytical calculations leakage showed allowable limits specified Australian, British, American standards.
Язык: Английский
Процитировано
11Diffusion and reaction within porous packing media: A phenomenological model
Biotechnology and Bioengineering, Год журнала: 1993, Номер 41(10), С. 947 - 956
Опубликована: Апрель 25, 1993
A phenomenological model has been developed to describe biomass distribution and substrate depletion in porous diatomaceous earth (DE) pellets colonized by Pseudomonas aeruginosa. The essential features of the are diffusion, attachment detachment to/from pore walls biomass, diffusion within pellet, external mass transfer both bulk fluid a packed bed containing pellets. bench-scale reactor filled with DE was inoculated P. aeruginosa operated plug flow without recycle using feed glucose as limiting nutrient. Steady-state effluent concentrations were measured at various residence times, pellet lowest time. In model, microorganism/substrate kinetics characteristics predicted from literature. Only parameters treated unknowns, determined fitting data mathematical model. rate-limiting step conversion be internal resistance; resistance microbial kinetic limitations found nearly negligible. outer 5% contributed conversion.
Язык: Английский
Процитировано
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