Due to the existing energetic demand worldwide search for alternative energy sources is necessary. Bioenergy has been studied in last decades as a promising source and use of bioelectrochemical devices become important. In this paper plant Agapanthus africanus L. Hoffman's was used evaluate both growing voltage generation an electrochemical device adapted at root system plant. For this, planted either with or without compost varying position anode. Growth monitored throughout all...

Activated sludge modeling technology is maturing; however, currently, there exists a great need to increase its use in daily engineering practice worldwide. A good way for building the capacities of practitioners promote practices and standardize protocols. In this study, systematic procedure was proposed calibrate Sludge Model No. 1 (ASM1) at large wastewater treatment plant, by which model adequately predicted quality effluent quantities. hydraulics set up validated through tracer test....

Removal of Cr(VI) from aqueous solutions byZea maysrachis (ZMR) was studied. The BET surface area theZeamaysmaterial 1.25±0.01 m2g−1, with an average...

Abstract The behavior of composite beads Zea mays rachis and sodium alginate (AL) for Pb (II) adsorption was studied. rachis–sodium prepared characterized. IR spectra showed interactions the functional groups metal ions after adsorption. kinetic data were fitted to pseudo-first- pseudo-second-order models, maximum capacity 60 mg/g (II), isotherm best adjusted Freundlich model, indicating that adsorbent is heterogeneous. thermodynamic study shows process physisorption. service time columns...

Copper and lead were found in sediments of Chimaliapan Lake the State Mexico; these elements may come from local tanneries other industries. The sorption behaviour copper by Lemna gibba sampled same lake was determined. results showed that removal capacity for (about 98.9%) higher than (60%). maximum adsorption capacities at pH 4 highest Pb(II). Adsorption kinetics experimental data fitted pseudo‐first ‐second order models ( R 2 = 0.99). Equilibrium Pb(II) best to Langmuir model Cu(II)...

Dilute acid hydrolysis at high temperature is one technique to pretreat and produce monomeric sugars from lignocelluloses; however, its main disadvantage the production of inhibitory aldehydes. In this paper, sugar was realized by corn stover employing 2.2 M hydrochloric solution low range (60 – 80 ºC). Experimental data were great fitted different kinetic models, thermodynamic parameters calculated first order, Saeman biphasic model, rate constants showed similar values between each other...

AbstractThe adsorption behaviour of Cu(II) was investigated in the presence a new material. This material obtained from chitosan (Ch) and polyvinyl alcohol (PVA) at different weight percentages (35/65, 50/50 65/35), dripping this mixture NaOH solution, then subjecting to crosslinking reaction under nitrogen atmosphere 353 K with ethylene glycol diglycidyl ether improve its resistance acids alkalis. Adsorption test were conducted evaluate optimal Ch/PVA ratio, 35/65 ratio presented best...

An experimental study of hydrodynamic and mass transfer processes was carried out in an absorption column 0.252 m diameter 3.5 packed bed height developed by Mexican National Institute Nuclear Research ( ININ its acronym Spanish) stainless steel gauze corrugated sheet packing means SO 2 -air-water systems. The experiments results include pressure drop, flows capacity, liquid hold-up, composition, global coefficient unit generalized performance model order to know the relationship between...

Tracer tests with rhodamine WT were performed at the biggest wastewater treatment plant of Mexico (‘Dulces Nombres’ WWTP, 5 m3/s). The aim was to develop hydraulics sub-model represent aeration tanks, in context a project for calibrating activated sludge model N°1 (ASM1). planning experiment by pre-simulation AQUASIM, which allowed determining quantities dye (8 L per reactor) and sampling schedule that required. After tests, concentration profiles outlet mixed liquors fit different...

The composites sodium alginate (AL): Zea mays rachis (ZMR) with different ratios were prepared and tested for the adsorption of lead.The composite 1:2 ratio showed highest capacity lead, this material was characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy zero point charge determined.The wastewater taken from one discharge to a marsh used removal Pb(II), acidified, solids allowed sediment water filtered avoid excessive fouling adsorbent material.The...

Acid hydrolysis was performed to produce reducing sugars from pineapple crown (PC), corn cob (CC), and rose stem (RS); the holocellulose contents of PC, CC, RS were 69.36%, 70.17%, 63.89%, respectively. The highest production obtained at 150 °C 1.5 M sulfuric acid (H2SO4) for PC (46.04 g/100 g) 2.0 (41.61 15.96 g/100g respectively) CC with a reaction time min. Saeman equation adequately described kinetics. reduced predominant (k1> k2, kr> 1) instead decomposition that dominated by...

Drying is one of the most important operations in coffee processing industry, which consists removing some water contained grain, from 55% moisture content to 10 or 12%. In present paper, an industrial dryer vibrofluidized bed beans (Coffee arábica L.) was optimized, until year 2017 presented losses drying process about 19% total treated. An analysis hydrodynamic and vibrational operation parameters carried out, as well considerations on physical properties kinetics beans. The operated...

A hybrid system of a sequential oxic-anoxic bioreactor and fluidized immobilized cell carbon oxidation with Kaldnes K1 as supporting material activated were used to evaluate the removal efficiencies for biochemical oxygen demand (BOD 5 ), chemical (COD), total nitrogen (TN) phosphorus (TP) from domestic wastewater collected at entrance biological reactor municipal treatment plant.The laboratory-scale biofilm was fabricated mm acrylic sheets, effective volume 31.6 L. The operation carried out...