Spirulina is a microalga that has a high protein content, in addition to having nutritional and pharmaceutical properties, and is, therefore, a potential source for obtaining bioactive peptides. The obtaining of biocomposites of interest from microalgal biomass can be influenced by factors of cultivation such as aeration, temperature, culture medium, and pH. Thus, this work aimed at evaluating the

Previous reported studies revealed that composite electrodes are effective and suitable for wastewater treatment applications due to its high porosity and increased electrochemical active area. However, the critical challenges to the wider adoption of composite electrodes for environmental applications are the need to reduce the cost of electrode materials and improve both their long-term stability

Toilet water is a typical wastewater that is abundant and has a low organic carbon-to-nitrogen ratio; therefore, it is necessary to explore an economical and efficient treatment option. Partial nitrification-anammox (PN/A) technology is characterized by low aeration energy consumption and a high nitrogen removal rate. As a process technology that has emerged in recent years, PN/A technology involves

Untreated high-strength salinity wastewaters pose a serious threat to the environment. Anaerobic treatment is an effective process with double advantages of waste stabilization and energy production. However, high organic compound and sodium toxicity in high-salinity wastewaters adversely affect the performance of anaerobic treatment. In this study, anaerobic hybrid (AH) and upflow anaerobic sludge

The transition to continuous biomanufacturing is considered the next step to reduce costs and improve process robustness in the biopharmaceutical industry, while also improving productivity and product quality. The platform production process for monoclonal antibodies (mAbs) is eligible for continuous processing to lower manufacturing costs due to patent expiration and subsequent growing competition

Continuous multicolumn Protein A chromatography offers various advantages for capture stage purification of monoclonal antibody therapeutics, like higher productivity and resin capacity utilization, lower buffer consumption, and small footprint, etc. Due to the complexity of the continuous process, experimental optimization is time-consuming and cost-intensive. This investigation proposes a hybrid

The biological industry, but also biorefining platforms in the context of the circular economy, have been fertile terrains for the development of a palette of novel products of increasing structural diversity and fields of application. To mention only a few of the more complex bioproducts, we can consider monoclonal antibodies, plasmid DNA, virus-like particles, and exosomes. Of course, some products

uring anaerobic digestion of wastes, volatile fatty acids production has been studied, and little attention has been given to alcohols and lactic acid. Thermodynamically, lactic acid and alcohols are better substrates to produce methane than other VFA. This research identified the metabolites produced during the fermentation of the organic fraction of municipal solid waste and their methanization in

Anaerobic co-digestion has been considered for improving anaerobic digesters’ stability and methane production, particularly for residues with low biodegradability or lack of alkalinity. Food waste was identified as a biomass with macro and micronutrients unbalance and low alkalinity content, both of which hamper its anaerobic digestion. The present study focused on evaluating the anaerobic co-digestion

Two functionalized nano-adsorbents were prepared by modifying carbon nanotubes and graphene oxide with active carboxyl groups, and used to remove Pb(II) heavy metal ions in aqueous solutions. The adsorbent combines the advantages of the active groups that can easily capture heavy metal ions and the high specific surface area of nanomaterials, has high adsorption capacity and affinity and is easily

This study investigates the adsorption of methylene blue (MB) and malachite green (MG) onto a novel biosorbent. Rapid industrialization pollutes water resources, causing serious environmental problems. Physical and chemical treatments were performed for biosorbent modification.

Adsorption has been widely applied in wastewater treatment for heavy metal removal. Due to the high cost of adsorbent materials, various types of materials including agricultural, industrial wastes and naturally abundant materials have emerged as low-cost adsorbents in recent years. However, enhancement processes need to be developed to improve the adsorption capability of the raw materials. It is

This paper investigates the catalytic activity of platinized titanium and titanium coated with ruthenium oxide in the processes of electrooxidation of ethyl alcohol in alkaline phosphate electrolyte and potassium hydroxide electrolyte in the non-flowing membraneless fuel cells proposed by the authors. In these systems, an interface between the phases formed, which played the role of a membrane. Cyclic

Chitooligosaccharides possess good physiological activity and a wide range of uses. In view of the difficulty in controlling the degree of polymerization of chitooligosaccharides prepared by chemical methods and the low efficiency of enzymatic methods, the preparation process of chitooligosaccharides prepared by H2O2 oxidation pretreatment combined with α-amylase catalysis was studied.

Aqueous two-phase systems (ATPS) have been demonstrated to be a simple and robust worldwide applied bioprocessing technology. From high value microscopic to macroscopic biological molecules obtained from a wide broad of matrices, ATPS have shown a high efficiency capacity for their concentration, enrichment, recovery, and purification. Particularly in Latin America, four relevant countries have paved

Two hybrid biofilm reactors, an integrated fixed-film activated sludge–sequencing batch reactor (IFAS-SBR) and a hybrid SBR with a mixture of activated sludge and granules, were used to reach enhanced nitrogen removal based on the anaerobic ammonium oxidation (anammox) process under intermittent aeration.

Transition metal catalysis has, over recent decades, developed into one of the most important methods of constructing molecules. However, although efficient in the construction of complex molecules, these catalysts can be expensive as they are often based upon second- and third-row transition metals which have, for the most part, low terrestrial abundance. Present removal and recovery techniques for

Acidic hydrolysis of a birch (betula pendula) xylan produced by a novel semi-industrial scale aqueous based and highly sustainable method was studied in batch reactor. Five commercial acidic heterogeneous catalysts were screened and significant differences in their performance was observed. Dowex 50WX2-100 was selected for further studies and the influence of the reaction parameters, including stirring

In this research, the modeling of Cu0.4Zn0.6Al2O4 catalysts performance and optimizing of esterification reactions were considered by the central composite design (RSM) response method. The main independent parameters of temperature, the ratio of alcohol to oil, the amount of catalyst and time duration have been considered for setting the esterification process. To access the maximum activity in the

A poly(ethylene terephthalate) (PET) based carrier was used for enzyme immobilization due to its good physical and mechanical properties. However, its high hydrophobicity and chemically inactive properties hindered its capability as an enzyme carrier. This study developed a PET-based carrier by grafting PET with maleic anhydride (MAH) before electrospinning. This carrier was used to immobilize laccase

The release characteristics of chloride during evaporation process of desulfurization wastewater droplets were studied by single droplet drying experiments. The mass, size and temperature variation of droplets during the evaporation process were measured and release mechanism of chloride was revealed. Besides, the influence of temperature, pH value and metal cation species on the release characteristics

Bioseparation is a crucial process for the obtention of biological products that are essential in daily life, such as medicine and food. At first, the researchers centered their efforts on the optimization of the upstream processes, conducting to high product titer. Afterwards, they turned their attention to improving the downstream processes. Since then, a revolution of technologies has been reported

As a low-rank coal, lignite (frequently referred to as “brown coal”) has a high latent moisture content and low energy density and thus has low value as a solid fuel, often being burned at power stations close to where it is mined. For this reason, an effective pretreatment is essential to the better utilization of low-rank coal for energy and materials. Ionic liquids (ILs) are alternatives to conventional

This research assessed the capacity for Cd+2 removal from water by using the canola meal based adsorbents: canola meal chemically activated with 1 M NaOH and 1-hour pyrolyzing at 500°C (CAC) and the second product obtained with the similar process but with the second pyrolysis at 750°C in CO2 flow (CAC-CO2). The materials were characterized by their chemical composition, thermal stability, FTIR, pHPZC

Bacillus species have been well-documented as bacteria isolated from soil with primary characteristics that were identified and applied to agriculture, wastewater treatment, pharmaceutic, and human life. This study focuses on the characterization of Bacillus strains isolated from a particular resource, which is seafood wastewater, and to list which correlating and different properties with those coming

ZSM-5 molecular sieve has an important application value in industrial adsorption. Due to the existence of micropores, it is hard for larger molecules to enter the ZSM-5 molecular sieve. In this paper, meso-microporous MFI zeolite was prepared by hydrothermal crystallization regarding the organosilane as the structure-directing agent. Then the samples were characterized by X-ray diffraction, infrared

Anisole (AN) is an important compound which has been studied in research into antioxidants, plastic stabilizers, pesticides and dyes studies. One of the technological alternatives to synthesizing them is using a modified solid catalyst with a soft colloidal template. Synthesis of anisole using dimethyl carbonate (DMC) and phenol over a mixed oxide catalyst derived from Mg-Al hydrotalcite employing

Microalgae can synthesize starch with productivity higher than conventional terrestrial crops, without the need for arable land. However, little is known about processes to extract starch from microalgae. Here, a biorefinery process is described including microalgal cell disruption followed by extraction of starch and pigments with aqueous two-phase system (ATPS) using choline chloride and polypropylene

The presence of pharmaceutical compounds has been studied in several countries in Latin America and many xenobiotic compounds have been identified in wastewater, surface water, and even drinking water, including ibuprofen and diclofenac. Microalgal-based systems have been identified as a good alternative for removing these micropollutants, particularly under tropical conditions, and they are associated

Backgrounds

Acetaldehyde is a main organic intermediate for manifold chemical products. In the near future, its production using renewable raw materials is rapidly becoming highly desirable. In this paper, investigations on pure and silica-supported molybdenum oxide (MoO3) as catalysts for the ethanol oxidative dehydrogenation process to acetaldehyde are reported.

In this study, porous g-C3N4 (PCN) doped with different masses of cobalt (1%, 3%, 5%, 10%) (Co-PCN) were obtained by a simple two-step calcination method. Herein, choosing Rhodamine B (RB) as target pollutant, RB degradation efficiency of Co-PCN (5%) driven by visible light was as high as 98.1%, which is 1.28 and 2.18 times that of PCN and g-C3N4, respectively.

Fly ash is an important source of trace elements that can act as cofactors of enzyme systems and improve anaerobic digestion processes. However, its effect on anaerobic digestion using real wastewater has not yet been studied. In the present work, the effect of fly ash on the anaerobic digestion of real winery wastewaters was studied, by means of specific methanogenic activity assays and with a special

Phosphorus (P) recovered and recycled from agricultural waste, such precipitation of struvite (MgNH4PO4.6H2O) and calcium phosphates from the effluent after anaerobic digestion of wastes, is an important approach to developing environmentally sustainable fertilizers. However, for controlled phosphorus precipitation/recovery, it is usually necessary to supplement Ca2+ or Mg2+ ions; this represents more

The determination of enantio-separation, absolute configuration and chiral recognition mechanism of ofloxacin and flumequine was carried out by high-performance liquid chromatography (HPLC) and modeling studies. The column used was a Chiralcel OD-H with normal and polar organic mobile phase modes. The exhaustive chiral separation was optimized through various HPLC parameters.

Chemical modification is a simple, low cost, very fast and easy production that has no limits as to the nature of the groups introduced into the enzymes. Chemical modification may be directed to improve enzyme stability, as well as selectivity, specificity, and activity.

Electrosorption efficiency for uranyl ion (UO22+) capture is low in acid solution due to the adverse effect caused by protons. This requires novel electrodes effective at acid conditions for UO22+ electrosorption in highly acidic industrial effluents such as spent nuclear fuel treatment.

Scale-down models (SDM) are crucial for efficient setting of different experimental conditions in cell culture media- or clone-screening applications and to predict the expected performance in larger bioreactor cultivations. However, the availability of such models for continuous bioprocessing are scarce and hampered by the requirement for proper cell retention in perfusion applications.

2-Phenylethanol (2-PE) is an aromatic alcohol with a delicate fragrance of rose petals that is widely used in perfumes, cosmetics, foods, beverages, and pharmaceutical industries. The yeast Yarrowia can produce 2-PE through L-Phenylalanine (L-Phe) biotransformation. However, it has not been properly explored in this field, despite its interesting characteristics for this process, such as the Crabtree

Putrescine oxidase (EC 1.4.3.10) is of interest for the microbial production of unsubstituted platform nitrogen (N-)heterocycles, because it only requires inexpensive oxygen as co-substrate. Putrescine oxidase from Rhodococcus erythropolis (Re-PuO) was shown previously to catalyze the oxidation of cadaverine; however, there is little information in the literature about the robustness of this enzyme

In this paper, Mn–Co binary oxides prepared by an (NH4)2CO3-assisted co-precipitation method were used for the catalytic oxidation of NO at low temperatures.

In this study, a new catalyst for low-temperature selective catalytic reduction of NOx with NH3 (NH3-SCR) were prepared by using glucose and discussed optimization of the synthetic conditions of MnxCo3−xO4/GC (glucose carbon) catalysts by using the design of the experiments. A response surface methodology (RSM) combined with the central composite design (CCD) was applied to model and optimize the synthetic

The occurrence of organic contaminants in surface water has drawn great concern in recent years. The construction of a heterostructure has been shown to improve photoactivity by boosting the separation of photogenerated charge carriers. In this work, magnetically separable NiFe2O4/Ag3VO4/Ag2VO2PO4 (NFO/AVO/AVPO) heterojunction photocatalysts were synthesized via a chemical etching method in ammonia

Chromium (Cr) is widely used in industrial processes and is considered a major source of pollution when released to the environment. Of particular concern, hexavalent chromium (Cr(VI)) is amongst the most toxic heavy metal affecting human health and living organisms when fugitive emissions contaminate aqueous environments. Consequently, its removal and recovery are priorities for environmental remediation

A new bimetallic 1%Cu-1%Pt/SiO2 catalyst for the selective hydrogenation of phenylacetylene was developed. The bimetallic catalysts were prepared by a consecutive incipient wetness impregnation method and a redox method with preadsorbed hydrogen. We showed that the catalytic properties of 1%Cu-1%Pt/SiO2 catalysts and selectivity toward styrene depend on the states of metals and interactions between

We aim to determine whether the rationale of designing a tetrameric non-fullerene acceptor (NFA) to minimize its aggregation compared to its dimer counterparts proves to be a valid strategy in the context of organic photovoltaic (OPV) processing involving solvent additives. We investigate the impact of the molecular design and the processing additive on the thin film formation behavior of four N-annulated

For the efficient use of cassava as industrial material in the fermentation business, an integrated process was developed to produce 2,3-butanediol (2,3-BDO) and bioethanol (BE) by a highly efficient and economical method. After separating the liquefied cassava into a solid and a liquid part, the liquid part was used to produce 2,3-BDO, and the solid part was then used to produce BE.

γ-Al2O3 and silica-doped aluminas are largely used supports for industrial catalysts. The addition of silica to alumina modifies its acid–base properties, also affecting its dispersion ability of supported species. In this paper, investigations on the silica doping effect in alumina-supported MoO3 catalysts, developed for the oxidative dehydrogenation process of ethanol to acetaldehyde, are reported

Methanol, a common air pollutant, can be converted to CO2 by biofiltration. In turn, biofilter CO2 streams, contributing to the greenhouse effect, could represent a zero-cost carbon source for microalgal production. To assess the potential of the combination of both bioprocesses, cultivation of Arthrospira maxima, a major source of added-value natural products, was carried out with three different

Ginsenoside Rb1 is one of the major bioactive components of Panax ginseng C.A. Meyer (Araliaceae), a medicinal plant that has been used for therapeutic purposes for thousands of years in Asian countries. The pharmaceutical activity of ginsenoside Rb1 highly depends on molecular structure and its deglycosylated metabolites are known to be more potent bioactive compounds. However, these deglycosylated

The use of methane as electron donor for denitrification addresses nitrogen removal in anaerobic effluents and can help to abate greenhouse gas emissions from wastewater treatment plants. However, applicable rates of methanotrophic denitrification were only reached under temperature controlled conditions, and in membrane bioreactors, which are not widely available in low-income countries. In this study

The emergence of infectious diseases is accelerating the intensification of bioprocess strategies to support the increasing demand for manufacture of higher quantities of vaccines in short timeframes. Here, the development of stable Sf9 cell pools producing HIV-1 Gag-eGFP virus-like particles (VLPs) is assessed. Fluorescence-activated cell sorting (FACS) was employed to select high producing cells

Alkylpyrazines are odorous compounds conferring pleasant aromas to baked and roasted foods. However, they are also emitted during food processing creating a nuisance for the operators and the community. Only a few bacterial isolates have been shown to degrade 2,5 methylpyrazine (DMP) as model alkylpyrazine. This work aimed to study the ability of DMP biodegradation by the filamentous fungi Fusarium

Increasing world population, industrialization, and economic development demand more energy at a global scale, and is being met with the exploitation of fossil fuel causing CO2 and CH4 emissions contributing towards rising earth's temperature. Microalgae are considered as the potential sources for CO2 abatement as well as to combat food security by ensuring nutritional food supply for sustainable living

This study aims to investigate the effect of simultaneous CO2 addition and biomass recycling on specific performance parameters (including biomass productivity and harvestability, as well as species abundance) of the mixed culture of two freshwater microalgae Chlorella vulgaris and Scenedesmus obliquus in a flat-panel photobioreactor grown semi-continuously using secondary effluent urban wastewater

In the process of petrochemical, coal chemical and pharmaceutical industries, a large amount of azeotrope are usually produced. The traditional method of separating azeotrope consumes a lot of energy. Therefore, it is of great significance to develop a low energy consumption and high efficiency method of separating azeotrope to achieve economic benefits and reduce energy consumption. The use of microwave

Lipases are the versatile biological catalysts used in a wide range of commercial synthetic applications. Microbial lipases have been widely used in the pharmaceutical, food, textile, oleochemical, paper, and bioenergy industries, in the composition of detergents, and in the production of polymers and enantiomerically pure chemical intermediates. Lipases have a unique lid opening mechanism that makes

A tremendous increase in human population and industrialization leads to the problem of water pollution to a great extent. The textile industries are the major cause of this problem due to the significant use of organic synthetic dyes as coloring materials during the dyeing process. The presence of color in wastewater is a major environmental concern as these dyes are resistant to degradation by physio-chemical

Every minute, 1 million bottled drinks were purchased worldwide in 2017. Poly(ethylene terephthalate) (PET) bottles are highly recalcitrant wastes, taking at least 450 years to decompose naturally, and their accumulation in the environment triggers a series of environmental impacts. Recycling is an environmentally friendly alternative to PET waste management. A two-step PET depolymerization approach

This study aimed to evaluate the effect of hydrothermal carbonization on the activated carbons properties of tamarind seeds, which were used as a support in porcine pancreatic lipase (PPL) immobilization, and to evaluate the biocatalyst in the butyl butyrate synthesis.