In the recent past, photocatalytic membrane process has gained interest in wastewater treatment applications. In this study, the ability of the advanced oxidation technology coupled membrane process was evaluated during chloramphenicol (CAP) filtration. Titanium dioxide doped hydroxyapatite (TiO2‐HAP) based photocatalytic membrane for chloramphenicol (CAP) degradation was investigated. The TiO2‐HAP

The present study aimed to optimize the removal efficiency of ammonia nitrogen (NH3‐N) and total kjeldhal nitrogen (TKN) from domestic wastewater as a function of hydraulic loading rates (HLR) (0.16–5.44 m3/m3.d) and the aeration rate (3, 5 and10 L/min) in a vertical flow aerated steel slag filter (VFASSF) system with nitrifiers bacteria. The nitrifier bacterial cell morphology was determined using

Acrylamide is an important monomer for the synthesis of polyacrylamide, which has wide applications in industries. This molecule was produced by the hydration of acrylonitrile which was catalyzed by the enzyme nitrile hydratase (NHase) secreted by microorganisms. Therefore, synthesis of acrylamide was carried out by a soil isolate Rhodococcus rhodochrous (RS‐6) cells with NHase. The critical parameters

Semiconductor nanomaterials have gained great attention as potential photocatalysts to promote environmentally benign organic reactions. Degussa P25, known as commercial TiO2, is the most applicable semiconductor photocatalyst. However, the wide band‐gap of TiO2 limits its application. A simple way to address this issue is to form heterojunction structures.

Fungi have the great ability to biotransform drugs, making it possible to direct their application to obtaining new molecules. Our group developed a hybrid fixed bed‐airlift reactor (FB‐ALR) model that allows the formation of Cunninghamella elegans (or other fungi) biofilm and biotransformation of diclofenac (DCF).

Problems of long extraction time, large footprint, low single‐stage extraction efficiency, and complicated production processes in solvent extraction equipment in recycling of modern industrial precious metal waste liquids are addressed and application of miniaturized equipment to hydrometallurgy is proposed in this study. A 3D‐printed multichannel microfluidic reactor will likely replace traditional

Starch can be used as carbon source for producing MK‐7 by Bacillus sp., but the final titer and productivity are unsatisfactory because starch cannot be effectively hydrolyzed to fermentable sugars. This article focuses on developing thermo‐tolerable MK‐7 high‐producing strains by temperature‐induced mutagenesis‐based adaptive evolution.

Two lab‐scale experimental systems, a membrane bioreactor (MBR) and a moving bed biofilm reactor‐membrane bioreactor (MBBR‐MBR), both treating real high‐strength, saline wastewater from a table olive processing plant, were operated under identical conditions to comparatively evaluate their performance for three different Hydraulic Retention Times (HRTs) of 88, 96, and 104 h.

Dehydrogenases dependent on NAD(P)H are widely applied for biosynthesis of chiral chemicals. However, they are unstable and easy denaturation compared with hydrolases. New strategy for dehydrogenases immobilization with the advantages of easy operation and high activity recovery should be developed. Biocompatible hybrid materials (GO‐PEI‐M) has been obtained by metal ion coordinated polyethylenimine

Cocoon waste, solid waste from the silk industry, is currently utilized as low‐cost spun silk yarn. In this study, the enzymatic valorization process of yellow cocoon waste to produce antioxidative sericin hydrolysate and fibroin film was demonstrated.

Soil degradation, overuse of chemical fertilizer, and biodiversity loss are serious problems challenging the sustainable development of modern agriculture. In recent years, owing to the advantages of algae biotechnology in nutrients recovery and soil improvement, the integration of algae‐based wastewater remediation and algal bio‐fertilizer production is emerging into the limelight. In this work, we

Selective catalytic reduction (SCR) of NOX has been the most widely used technique for the reduction of NOX emissions from combustion flue gas. MnOX/FeOX based catalysts typically can attain high NOX conversion at low temperature but inferior water vapor resistance.

Low cost biosorbent (derived from peanut shells) with abundant oxygen‐containing functional groups can adsorb well naproxen drug in solution. This study aimed to explore the main interactions responsible for adsorbing naproxen and develop several conventional methods for identifying primary adsorption mechanism. Some important operation parameters strongly effecting the adsorption process and mechanism

A plug flow model without axial dispersion was utilized to evaluate the mass transfer coefficient in Scenedesmus microalgae culture grown in a split airlift photobioreactor. The local volumetric mass transfer coefficient and the local interfacial area also were calculated at various gas velocity (1.0, 2.0 and 2.8 cm s–1). In the riser and the downcomer section, the local volumetric mass transfer coefficients

Poultry litter (PL) is one of the drier and bulkier manures produced in intensive agriculture. Land spreading is considered the most common treatment option for PL, however this cause large atmospheric greenhouse emissions and consequently high negative environmental impact. PL has several factors that limits its sustainable use as energy source, thus still the necessity of more studies about sustainable

The dissolubility of magnesium hydroxide is often the main factor limiting its application effect in the environmental field, the dissolution rate of magnesium hydroxide during its synthesis is also worthy of attention. In this paper, response surface methodology was used to synthesize magnesium hydroxide with different dissolution rate through a magnesium oxide/ammonium acetate hydration system, and

It is of great benefit to recycle excess sludge, which is rich in inorganic and organic nutrients, as the substrate material for yeast growth. This study focused on dispose of residual liquid of sludge after pretreatment. Candida utilis was firstly chosen to be cultivated in the sludge hydrolyzate for simultaneous efficient nutrients removal and yeast utilization through aerobic process.

In order to protect water resources and reduce the harmful effects of releasing contaminated wastewater to the environment, the textile industry has increasingly demanded improved water reclamation technologies, such as membrane distillation. In this work, theoretical and experimental investigations were carried out to evaluate the behavior of the operational parameters of a direct contact membrane

Petroleum hydrocarbon pollution has become a global concern, and seeking an appropriate strategy for treatment of petroleum hydrocarbons is necessary, especially under saline–alkaline conditions. In this study, microbial consortia capable of utilizing low‐molecular‐weight aliphatic petroleum hydrocarbons (n‐decane, n‐dodecane and n‐hexadecane) as the sole carbon source were enriched from crude‐oil‐contaminated

Biostoning using cellulase is a process used in place of the traditional stone‐washing of denim. This process guarantees a more controlled removal of the Indigo blue dye from the cotton fibers, giving an aged‐look and softness to denim. However, it also causes backstaining and generates a high volume of colored effluent. In this context, this work evaluated the possibility to reuse the effluent from

Traditional large‐scale culture systems for human mesenchymal stem/stromal cells (hMSCs) use solid microcarriers as attachment substrates. Although the use of such substrates is advantageous because of the high surface‐to‐volume ratio, cell harvest from the same substrates is a challenge as it requires enzymatic treatment, often combined with agitation. Here, we investigated a two‐phase system for

At present the majority of polyurethanes, including polyurethane foams (PUF), are obtained from petrochemical substrates. However, green chemistry policy worldwide and restricted crude oil resources are driving the use of biological substrates to make polyurethanes. Widely available cellulose seems to meet the expectation of a polyol substrate for use in synthesizing polyurethane foams provided that

Transport of organic acids through nanofiltration membranes varies considerably under different conditions. In the present work, a Maxwell–Stefan approach coupled to the Henderson–Hasselbach equation was applied to describe succinic acid permeation through nanofiltration membranes in binary and ternary solutions. Permeate flux and solute rejection were evaluated under several test conditions, by modifying

Liquefaction has been considered as a promising way to convert lignocellulosic biomass to high energy density and grade liquid fuel. Generally, mixed solvents are more effective for biomass liquefaction than a single solvent due to the synergistic effect among the components of the mixture solvent. 1,4‐Dioxane, ethanol and formic acid with low boiling points are frequently used to liquefy biomass,

There is a rising interest in viral and non‐viral gene delivery vehicles for human gene therapy and vaccination applications, and these vehicles include nanoparticulate virus, virus‐like particles (VLP) and plasmids. This communication debates the importance of designing innovative platforms for virus and VLP concentration and purification, envisaging downstream process integration and intensification

Due to a variety of toxicological problems, the presence of As(V) in aquifers is a significant concern. Sorption using chitosan doped with iron nanoaggregates results in a green and cheap methodology for its elimination.

Sulfate reducing bacteria are considered as the major cause of microbial induced corrosion. It contributes to a lot of environmental and other major expense industrial problems in petroleum industry. Thus, there is always a great need for producing new efficient biocides and biocorrosion inhibitors.

2‐Phenylethanol (PEA) is an important aromatic compound produced mainly by chemical synthesis. PEA production by biotechnological approach has gained popularity in recent years. However, biological synthesis of PEA is limited by microorganisms and product inhibition. The influence of culture temperature on the bioconversion of L‐phenylalanine (L‐Phe) into PEA is investigated in this study. A novel

Blending d‐lactic acid (d‐LA) with l‐lactic acid can significantly improve the thermostability of polylactic (PLA). Although microbial production of d‐LA under acidic conditions is beneficial for the reduction of production costs, the yield is low due to the acidic toxicity of the source strains. Herein, an Issatchenkia orientalis glycosylphosphatidylinositol‐anchored protein IoGas1, which is required

Bee venom (apitoxin) is a complex mixture of enzymes, peptides, amines, and other chemicals that presents diverse pharmaceutical activities. Melittin, a small peptide with 2.84 kDa, represents about 50% of this venom, on a dry basis. However, allergenic compounds, such as phospholipase A2 and hyaluronidase (enzymes with a molecular weight of 19 and 38 kDa, respectively), impair the direct use of apitoxin

Stem cell therapy has emerged as a promising alternative for replacing lost cells involved in neurodegenerative diseases. High efficiency of differentiation and full cell viability are actual challenges to achieve the translation of cell therapies to the clinic. To address this, the construction of aqueous two‐phase systems in three‐dimensional (ATPS‐3D) cultures has been proposed. This technique involves

The synthesis gas or hydrogen‐rich gas, at longer residence times and higher temperatures, is frequently the target of pyrolysis biomass. Biochars obtained at such conditions contain less functional groups but they are more effective for longer‐term soil C storage. The aim of this study was to elucidate the adsorption mechanisms and the effect of the ageing process on high‐temperature biochar towards

The occurrence of pharmaceutical compounds in wastewater has become a major concern for human health and the environment. Therefore, it is an important challenge to improve conventional wastewater treatment to remove these compounds. Coupling biological treatment with advanced oxidation technology has been widely studied in the literature, but only sequential associations of the two processes have

Membrane bioreactor (MBR) is commonly considered a promising technology for wastewater treatment due to its outstanding effluent quality, low sludge production, and smaller environmental footprint. However, membrane biofouling is regarded as the bottleneck of MBR processes preventing their universal application. Optimizing operating conditions and improving the antifouling properties of membranes have

Wastewater generated from seafood processing plants poses a serious threat to the draining environments. In addition, huge amount of fish scales are discarded as solid waste from seafood processing plants and fish markets. These biowastes can be used as biosorbent in the treatment of wastewaters. In the present work, waste fish scales were employed as biosorbent in order to explore the adsorption capacity

Nemours plant‐based biomass exhibit higher removal capacities in comparison to chemical treatment methods. The present study aimed to investigate the potential of Moringa oleifera (MO) seeds and Musa cavendish (MC) peel biomass pre‐treated by HNO3 (1 N) and NaOH (0.1 M) for removing nickel (Ni), lead (Pb) and cadmium (Cd) ions from synthetic groundwater. It further aimed to establish the design and

Applications of chemical and enzymatic methods of esterification have been limited by low selectivity of chemical catalysts and low productivity and high cost of enzymes. The objective of this study was to produce eugenol esters with high productivity and selectivity using a microwave technique without adding any catalyst or solvent. Specific focus was given to reaction temperature and molar ratio

4‐Nitrophenol, as a representative hazardous contaminant, may pose potential risks to the environment in the process of production, storage, and use. Catalytic hydrogenation reduction offers a promising route to the removal of 4‐nitrophenol by its transformation into the less toxic and biodegradable 4‐aminophenol. In this work, nickel−cobalt bimetal oxide nanostructures were fabricated by the thermal

For improving the permeability and selectivity of adsorption separation membranes, membrane materials, structural morphology and separation technology must continue to be investigated. Development of a membrane that is environmentally friendly, cost‐effective and with high filter precision is an important direction in current research.

(2R,3S)‐N‐tert‐Butoxycarbonyl‐3‐amino‐1‐chloro‐2‐hydroxy‐4‐phenylbutane (1b) is key for the synthesis of the antiviral drug atazanavir. It can be obtained via the stereoselective bioreduction of (3S)‐3‐(N‐Boc‐amino)‐1‐chloro‐4‐phenyl‐butanone (1a) with short‐chain dehydrogenase/reductase (SDR) (EC 1.1.1.1). To develop a practical and cost‐effective biocatalytic approach with high stability and reusability

Most drugs are designed for immediate release via oral administration, releasing the dosage rapidly. Those administration forms can present a wide variation in drug concentrations, which can be harmful to a patient, when the amount of drug is either below or above the therapeutic range. Modified‐release formulations promise to alleviate the problems inherent to immediate‐release drugs by modifying

Agro‐industrial co‐products rich in lignocellulose, for example cassava petiole (CP) waste, have high potential as sources of porous carbon materials, alongside other impressive advantages, including ease of acquisition, abundance and availability, renewability and low cost. This work shows the successful treatment of mesoporous carbon with rod‐like structure derived from agro‐industrial CP waste carbonized

Fe based metal organic frameworks (Fe‐MOFs) were prepared by solvothermal method, and carbon loaded Fe3O4 (Fe3O4/C) was prepared by pyrolytic carbonization and carbothermal reduction.

Amoxicillin (AMX) is one of the pharmaceutical compounds in waters being targeted in wastewater decontamination studies, and some of the technological alternatives to degrade it involve using modified surfaces with transition metal oxides, such as IrO2/Ta2O5|Ti and RuO2/Ta2O5|Ti, for in situ production of hydroxyl radical (•OH) to oxidize AMX in aqueous media.

Considering that the greatest proportion of microalgae commercial production is realized outdoors, it is critically important to highlight the role of the local climate in the performance of the processes. Currently, there is a tendency to identify locations with suitable climates for the large‐scale implementation of microalgae‐based processes. Therefore, this study proposed to map the performance

Brazil is responsible for 60% of the global production of orange juice, accounting for over three‐quarters of global orange juice exports, resulting in large quantities of orange bagasse (OB). This is an underutilized byproduct of the orange juice industry and corresponds to 50% of the fruit weight. The objectives of this study were to produce cellulose from OB using a combination of ultrasound and

Enzymatic hydrolysis of lignocellulose is regarded as the most efficient route to producing fermentable sugars, one kind of promising future biofuel, while physiochemical pretreatment is the initial but most critical step for the efficient utilization of lignocellulose.

The micropollutant carbamazepine (CBZ) is persistent and resistant to conventional wastewater treatment. This study investigated the role of fermentative acidogenic bacteria (FAB) and sulfate‐reducing bacteria (SRB) for CBZ biodegradation and volatile fatty acid (VFA) production.

MAPK/HOG signaling pathway plays a key role in the response of yeast to external hyperosmotic stress. Over the past few decades, the regulation mechanism for this pathway in the robust yeast, Saccharomyces cerevisiae, has been elucidated. However, the weak ability of the biotechnical workhorse, Pichia pastoris, in surviving hyperosmotic stress suggests a unique regulatory mechanism needing further

In this study, graphitic carbon nitride (g‐C3N4) photocatalyst was successfully synthesized via calcination of urea under argon flow and tested for methyl paraben (MeP) degradation in aqueous media under simulated solar light for the first time. Its structural, morphological, and optical properties were investigated with the use of X‐Ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), and

This study explores the feasibility of three different inoculum sources (anaerobic, aerobic, and anoxic sludge from conventional sewage treatment plants) together with the potential of biomass carrier for Anaerobic ammonium oxidation bacteria (anammox) cultivation. Fed‐batch reactors were operated with synthetic medium at different temperatures.

Membrane fouling is one of the major drawbacks in microalgae harvesting that prevents the widespread application of membrane filtration. This study investigates the effects of operating parameters on the filtration performance and the fouling phenomenon of a pilot‐scale microfiltration (MF) system equipped with different ceramic membranes for Chlorella vulgaris culture harvesting.

Reverse osmosis (RO) plays an increasingly important role in boron removal. In this study, novel polyamide RO membranes and modules with high boron rejection were fabricated by cross‐linked glutaric dialdehyde (GA) grafting. To evaluate the influence of GA grafting on membrane materials, the surface properties before and after modification were analyzed.

Pistachio shell is a lignocellulosic biomass with a high potential to be converted into chemicals, biopolymers, and biofuels. Alkaline pre‐treatment is an effective way to extract hemicellulose and increase the cellulose hydrolysis. However, there are some disadvantages to this process, such as a long processing time and the formation of high amounts of degradation products. Microwave irradiation can

Olive mill wastewater (OMW) represents an environmental problem due to its high organic load and relevant concentration of phenolic compounds (PCs). OMW treatment and disposal represents a relevant challenge and cost for olive mills and multi‐utilities in charge of waste management in Mediterranean countries. The goal of this study was to develop an anaerobic co‐digestion (co‐AD) process of OMW and

Deep eutectic solvents (DESs) have been tested as promising green solvents for the microwave‐assisted extraction of phenolic compounds from brewer's spent grain (BSG). Firstly, a preliminary screening with four different DESs was carried out in order to determine the most effective DES for recovering phenolic compounds (measured as total phenols) from BSG. Later, an experimental design using the DES

With the development of modern industry, the task of replacing ordinary plastic products with environmentally friendly antibacterial materials is a high priority. In this study, natural cellulose from sugarcane was compounded with glycerin and chitosan to prepare a cellulose/glycerin/chitosan (CGC) degradable composite membrane with antibacterial properties. The physical and chemical structure of the

The present work focuses on a harmless treatment of hazardous substances in spent commercial selective catalytic reduction (SCR) catalyst by using cement as a binder. The spent V2O5‐WO3/TiO2 SCR catalysts were ground and mixed with the cement to prepare the solidified products, according to a simple method in this study. The solidified products were subsequently submitted to a characterization process

CO2 reforming of methane, also known as dry reforming of methane, has received significant attention because this technology can convert notorious greenhouse gases (CH4/CO2) into useful syngas (H2/CO). However, this technology still has not been commercialized, primarily due to the lack of feasible catalysts.