Pigmented rice is rich in coloured molecules known as anthocyanins, which exhibit a strong antioxidant activity and are used as additives to improve both the aspect and nutraceutical value of food.

Textile wastewater is known for its polluting potential and toxicity. Biological, affordable treatments are especially desirable in developing countries to fulfill legal and ecological demands during its treatment.

Pb(II)‐containing wastewater causes serious pollution in our daily life. Adsorption is the technique most often used to remove heavy metals from aqueous solution. For improving the removal efficiency of Pb(II) ions from aqueous solution, adsorbent materials and the functionalization method of the adsorbent need to be further studied.

Maintaining the stability of an immobilized enzyme during storage is generally very problematic. However, various substances have been reported to have a positive effect on enzyme stability. These include reducing disaccharide lactose, which is used in carriers in the form of pellets with immobilized cholinesterase. These carriers serve as a filling for detection tubes (biosensor), which are used for

As population and fuel demand increase, many events of oil spills in the environment have been recorded. In order to restore these environments, several techniques have been proposed in the literature, especially in the field of bioremediation, with their main advantage being the low impact on the environment. In this work, poly(butylene succinate) micro spheres containing urea were produced, representing

Photocatalytic water treatment by using semiconductor material with low‐cost, green and environmental features is the main candidate for the actual application of photocatalytic reaction.

Although phenol is a key intermediate in the plastics and polycarbonate industry, it is also a toxic component that requires removal from dilute aqueous streams, potentially by liquid‐liquid extraction (LLX). For LLX, cumene is suggested as solvent as it is already present in processes in the polycarbonate industry. For the recovery of cumene from phenol by distillation, knowledge on vapor‐liquid equilibrium

The excessive and indiscriminate use of synthetic agrochemicals and toxic fumigants has become essential to maximize the agricultural production worldwide. Despite their beneficial roles in the field and during storage, they produce environmental pollution, increasing pesticide/herbicide resistance and destruction of beneficial insects, and placing the health of producers and consumers at risk.

Epoxidation of double bonds in vegetable oils gives valuable green intermediates for chemical industry. The epoxidation of oleic acid with hydrogen peroxide according to the Prilezhaev principle was studied experimentally in a multiphase laboratory‐scale batch reactor operated isothermally at 50°C and atmospheric pressure. Solid cation exchanger (Amberlite IR‐120) was used as the solid catalyst to

The current study investigated the co‐pyrolysis nature of biomasses, gas yields, kinetics and thermodynamics of Chroococcus sp. (CC), digested municipal solid waste (DMSW) and the mixtures using thermogravimetric analyzer and mass spectrometer.

Thermophilic waste air biofiltration was developed to overcome the often observed drop in pollutant removal efficiency caused by classical reactor overheating above the mesophilic temperature range. To date, only a few studies have been reported on thermophilic biofiltration of airborne hydrophobic pollutants. In this work, a bubble column reactor (BCR) operated at 50 °C was used to treat waste air

Spent coffee grounds, a valuable source of phenolic compounds, are considered beneficial for human health because of their antioxidative properties. The liquid extract containing phenolic compounds (such as chlorogenic and gallic acid, etc.) can be obtained via extraction using environmental‐friendly organic solvent. The separation of chlorogenic and gallic acids from the liquid extract was carried

In recent years, the emission of volatile organic compounds (VOCs) from different sources has caused huge environmental problems. As a ‘green' terminal treatment technology, photocatalytic technology is a competitive technology that has practical application prospects for the emission reduction of VOCs. The core problem of photocatalysis technology is to construct a photocatalyst with higher activity

Microbial remediation of petroleum‐contaminated soil is a low‐cost technology that does not produce secondary pollution. However, the microbial degradation cycle is often time consuming and inefficient on account of the strong hydrophobicity of petroleum hydrocarbons.

This review summarizes the most common biological methods and their conditions for the recovery of bioactive compounds such as chitin/chitosan, proteins/peptides and carotenoids from marine crustacean processing side‐streams (MCPS). Chitin can be efficiently extracted from MCPS by adding proteases to hydrolyze the proteins (enzymatic hydrolysis), or by using (non‐)lactic acid fermentation to digest

The metal–acid bifunctional catalysts are widely used in many industrially significant chemical processes, including hydroisomerization of n‐hexane. Deactivation and regeneration of metal–acid bifunctional extrudates was investigated in continuous n‐hexane hydroisomerization in a fixed‐bed reactor. Four Pt/H‐Beta‐25 catalysts containing 30% Bindzil binder were prepared with the same composition and

Downstream processing of soluble recombinant proteins from Escherichia coli is complicated by the need to access the intracellular product by cell disruption and to separate the target protein from impurities, particularly host cell protein, DNA, endotoxins and lipids. We previously demonstrated the ability of the E. coli X‐press strain to leak high amounts of product to the culture medium without

Microbial degradation of organophosphorus (OP) insecticides has emerged as an efficient and cost‐effective technology for removal of pesticide residues from soil. Malathion‐tolerant Aspergillus (Aspergillus niger MRU01) was developed, mass cultured, harvested, mixed with coir pith at 3% on dry weight basis, shade‐dried aseptically to a 5% moisture level and stored for 60 days. The growth, metabolic

The removal of biological nitrite from wastewater can occur by both heterotrophic and autotrophic bacteria. Autotrophic denitritation can be implemented by using different sulphur forms (e.g., S2−, S0 or S₂O₃2−) as electron donors, and there is no need for organic carbon availability, as is required in heterotrophic denitrification. This work investigated an alternative biochemical pathway for nitrite

Higher‐value products, such as cellulose and carboxymethylcellulose (CMC), may be produced from lignocellulosic agroindustrial residues, such as oil palm empty fruit bunch (EFB) fibers that are presently underutilized or discarded. Recovery of cellulose from EFB and its conversion of CMC are discussed as methods of creating value and reducing the environmental impact of EFB.

In this study, sulfur‐doped g‐C3N4 (SCN) nanosheets were synthesized using thiourea as a precursor, and then used to catalyze the degradation of oxytetracycline (OTC) under visible‐light irradiation. OTC was chosen as target contaminant because of it being an important precursor of N‐nitrosodimethylamine (NDMA).

Industrial gaseous emissions causing odor nuisance have become a major environmental issue in many countries. Biotrickling filters are suitable for treating mixtures of gaseous compounds with high removal efficiencies. The aim of this work was to determine the vertical distribution of microbial communities stablished in a biotrickling filter treating a mixture of gaseous compounds causing odor nuisance

Environmental pollution by petrochemical plastic is a matter of serious global concern. Several microbes have the potential to degrade synthetic polymers with the aid of various genes, enzymes, and metabolic pathways. However, the biodegradation of petrochemical plastics by natural microbes is inherently slow. The slow rate of degradation stems from the high molecular weight, strong chemical bonding

Biobutanol is considered to be a promising alternative biofuel in terms of sustainability and environmental friendliness because of its desirable properties. High purity isopropanol–butanol–ethanol (IBE) mixture can be directly used as gasoline additive. However, the purification process of IBE is hindered because of its low concentration and high energy consumption. In order to reduce energy consumption

The aim of this work was to study the biological treatment of a synthetic wastewater containing emerging contaminants. The 95‐day experiment was conducted in an 81 L continuous flow conventional activated sludge apparatus consisting of anoxic and aerobic reactors with internal recycling, and a clarifier with activated sludge recycling. Real activated sludge from the municipal wastewater treatment plant

High‐efficiency saccharification technology is one of the bottlenecks of cellulosic bio‐hydrogen production. Cellulosic feedstocks saccharification currently performed by commercial cellulase, which is composed of different fungal cellulase. Compared with fungi, thermocellulosic bacteria represented by Ruminiclostridium thermocellum have a complete cellulase system, and a higher cellulase catalytic

This work presents a critical evaluation of the use of accumulated energy (QUV) as a parameter for the scale‐up of solar photoreactors. The combined effect of initial pollutant load, iron concentration and UV radiation on industrial wastewater treatment by solar photo‐Fenton was investigated to identify photolimitation and photosaturation conditions.

Water contaminated by heavy metals has many negative impacts on human health and the environment. According to the UN's sustainable development goals, preserving natural resources will have positive impacts on living conditions by reducing diseases. In this study, a novel adsorbent synthesized from phosphate‐based geopolymer cement composite material was developed and evaluated for lead removal from

Among the many classes of pollutants, bioactive contaminants including pesticides, herbicides, and other pharmaceutical active compounds (PhACs) are causing significant concern. These chemicals have been linked directly to contamination of freshwater and food sources, threatening water and food security. Contamination from antibiotics, one class of PhACs, is also considered to link strongly to the

The objective of this work was the development of silver nanoparticles (AgNPs) coated with humic acid (HA) and their incorporation into an enamel for antifungal activity. AgNPs were synthesized by chemical reduction using sodium borohydride as a reducing agent and coated with HA. Uncoated AgNPs were synthesized as control. AgNPs and HA‐AgNPs were characterized by ultraviolet–visible spectrophotometry

Green‐tea‐synthesized copper oxide nanoparticles (CuO NPs) and S‐nitrosoglutathione (GSNO), a nitric oxide (NO) donor, were applied individually and in combination to lettuce leaves. We aimed to investigate whether a combined application of CuO NPs and GSNO might enhance plant growth when compared to individual treatments and the control group.

In a biorefinery process, 5‐Hydroxymethylfurfural (HMF) is a promising biomass‐derived chemical with diverse industrial applications. The biotransformation of HMF to different high‐valued furanic derivatives, such as 2,5‐furandicarboxylic acid, 2,5‐diformylfuran, 5‐hydroxymethyl‐2‐furancarboxylic acid, and 5‐formyl‐2‐furancarboxylic acid, has led to the transition from fossil‐derived products to bio‐based

This work studied the treatment of and metal recovery from a synthetic acid mine drainage (AMD) containing 500 mg L−1 copper (Cu2+) and iron (Fe+3), and 50 mg L−1 nickel (Ni2+) and tin (Sn2+) by using a bioelectrochemical system (BES). The presence of electroactive bacteria improved the performance of such reactor configuration, by contrast with systems with abiotic anodes.

Brewers spent grains (BSG) represents ≤85% of a brewery's solid waste and common disposal to landfill is increasingly more difficult. Yet BSG is a food‐grade by‐product with potential economic valorization that can significantly improve resource efficiency and reduction in carbon emissions. This study investigated valorization of BSG through the application of novel high solids hydrothermal processing

Microalgal biodiesel is one of the best promising candidates as an alternative liquid fuel in response to the energy crisis. The timely development of cost‐effective and environmentally friendly culture systems for enhancing microalgae production on a commercial scale is extremely important. In this study, the effects of the process variables temperature, LED light source (blue, white, red), light

The textile industry generates a huge amount of effluents having different hazardous dyes. Indigo carmine and malachite green are most commonly used dyes in textile and dye industries. Pollution of these dyes affects aquatic life.

Monoclonal antibodies (mAbs) presently dominate the biotherapeutic market. However, biotherapeutics in general, and mAbs in particular are expensive therapies and outside the realm of affordability to most of the world. In an attempt to lower their cost of manufacturing, a novel in‐house non‐protein A continuous platform has recently been reported for mAb purification. In this paper, we perform an

Red‐fleshed dragon fruit contains high amounts of heat‐sensitive betacyanin pigments that require non‐thermal technologies in their processing. Ultrafiltration (UF) can be a promising alternative technique for fruit juice clarification and cold sterilization.

Natamycin, an antifungal agent, has been widely used as a food preservative and medicine for fungal disease therapy. Seed preculture plays a crucial role in natamycin production, while studies on the effects of seed morphology on natamycin biosynthesis and corresponding regulation approaches are still absent.

Immobilization of enzymes on a nanocarrier can improve their stability, but is often accompanied by a reduction of the initial catalytic activity. Meanwhile, inevitable mass loss during centrifugal separation inhibits reusability. It is still a challenge to design and prepare an immobilized enzyme with both improved catalytic activity and reusability simultaneously.

The reaction integration of butanal self‐condensation and successive hydrogenation (that is, one‐step synthesis of 2‐ethylhexanol from butanal) is an efficiency way to simply process flow and reduce energy consumption for the commercial manufacture of 2‐ethylhexanol (2EHO). In the present work, a NiO‐MnO2/Nb2O5‐TiO2 catalyst was prepared for the integration reaction to reach a high 2‐ethylhexanol selectivity

The central stage of biotechnological production is the transformation of renewable raw materials into bioproducts in a water‐based bioreactor. The fermentation broth usually has a low concentration (less than 10%) of the bioproduct, which requires the application of subsequent separation and purification processes. For many bioproducts, separation is complicated by the presence of non‐ideal thermodynamics

Continuous process improvement of biopharmaceutical processes is an expectation of the current regulatory environment (e.g., ICH Q8 and Q10), and extends to older products as well as new licenses. Particularly in the case of older products, process changes are also often simply required to improve process efficiency, to facilitate easier manufacture and to update materials such as chromatography resins

Chen Y, Wu Q, Wang J, Song Y, The fabrication of magnetic recyclable nitrogen‐doped titanium dioxide/calcium ferrite/diatomite heterojunction nanocomposite for improved visible‐light‐driven degradation of tetracycline. J Chem Technol Biotechnol 2019, 94, 2702–2712 (https://doi.org/10.1002/jctb.6082).

To strengthen the treatment efficiency of photocatalytic ozonation, it is necessary to develop a stable bifunctional catalyst active in both processes of photocatalysis and catalytic ozonation.

Recombinant proteins produced for use as biopharmaceuticals need to harbor their native N‐terminus. A drawback in expression of recombinant proteins as fusion proteins with an affinity fusion‐tag is that enzymatic or chemical processing is required to trim the artificial tag and release the true protein of interest. In many cases, however, this processing step generates an incorrect N‐terminus.

Hexavalent chromium Cr(VI) is a toxic and carcinogenic heavy metal. It is highly water soluble and one of the most widely used metals in industry, resulting in soil and water contamination. Nowadays engineering microbes provide new strategies for remediation of heavy metals.

Nitrosomonas eutropha is a chemolithoautotrophic organism with an ability to oxidize ammonium to nitrite and nitrate. Continuous culture with and without cell recycling was used to enhance production of N. eutropha cell biomass using a 40‐L bioreactor. Whole cell biotransformation was used to convert methane (CH4) present in the biogas into biomethanol using N. eutropha.

This study reviews the evolution of the concept and the methodology of particle size distribution (PSD) analysis for sewage. Evaluation of experimental data indicated that the analytical approach started with an empirical identification of soluble, colloidal and supra‐colloidal organic matter. Then, it evolved into a sequential filtration and ultrafiltration methodology, yielding results useful enough

Metal oxides are promising sulfur host materials because of their superior adsorption ability. Based on this theme, ceric dioxide (CeO2) nanospheres with mesoporous structure were synthesized and designed as host materials to form CeO2 nanospheres/sulfur (CO‐NSs/S) composites.

Lignocellulose is usually pretreated as a raw material, and then it undergoes hydrolysis, fermentation, and other processes to produce biofuels, which is conducive to improving the utilization of agricultural and forestry wastes. However, most pretreatments, such as acid–base, CO2 explosion, and microbial degradation, could enhance the yield of enzymatically hydrolyzed (EH) sugars, but the conditions

TVEX‐TOPO, which is a commercial low‐cost macroporous copolymer resin containing 50% (w% Extractant fraction of total adsorbent mass) trioctylphosphine oxide (TOPO) was used for solid–liquid extraction of tungsten(VI) (W(VI)) and molybdenum(VI) (Mo(VI)) from nitric acid solution. The different parameters affecting the sorption process of both metal ions such as contact time, [HNO3], initial concentrations

Biogas is a valuable carbon‐free renewable energy source that can be produced from anaerobic digestion of organic waste. Accordingly, biogas production is promoted worldwide in efforts to reduce carbon emissions and optimize the recovery of resources from waste streams. In this paper the biogas production from bioresidues collected in the capital area of Reykjavik was modelled in Aspen Plus v10.

The failure rates and the scheduling of bioprocesses have a substantial impact on process performance and economics but are often overlooked and neglected. Integrated continuous biomanufacturing is more flexible in respect to scheduling and the impact of failures can be reduced by appropriate scheduling and lot definitions.

Chen Y, Wu Q, Wang J, Song Y, Self‐floating Cu/N co‐doped TiO2/diatomite granule composite with enhanced visible‐light‐responsive photoactivity and reusability. J Chem Technol Biotechnol 2019, 94, 1210–1219 (https://doi.org/10.1002/jctb.5871). The above article, published online on 13 November 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors

In this study, a novel magnetic material was applied as an adsorbent for simultaneous removal of Pb(II) and Cd(II) ions from aqueous solutions. The adsorbent was synthesized using functionalized MnFe2O4 magnetic nanoparticles grafted to lamellar graphene oxide surface (MnFe2O4@SiO2‐NH2@GO) and characterized using X‐ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy

Carbon dioxide (CO2) is regarded as a major contributor to global warming and the climate crisis. To mitigate its negative impacts, a potential strategy is adopted, namely converting CO2 into renewable fuels or valuable chemicals. Because of the sluggish thermodynamic and kinetic processes, catalysts (photocatalysts or electrocatalysts) are essential during CO2 reduction. In this review, fundamental

Lipases are an interesting class of enzymes that can be used as biocatalysts for poly(ɛ‐caprolactone) degradation. This work reports on the biochemical characterization of a lipase produced through solid‐state fermentation by Aspergillus melleus and its application to degrade poly(ɛ‐caprolactone).

The current system in the processing of seafood leads to accumulation of many waste products, such as shells, tails, heads and bones. This seafood waste can be exploited for the extraction of chitin, with numerous applications in different fields. Seafood waste treatment can produce some valuable products. For the valorization of chitin, its degradation is an important step that can be achieved using

Colorimetric determination of l‐asparaginase enzyme activity most commonly uses Nessler's reagent, but often yields unreliable results due to precipitation of tetraiodomercurate salts. Interference caused by some commonly used inorganic and organic compounds of biochemical buffers, reagents and microbiology fermentation media was determined. The stabilising effects of tartrate and polyvinyl alcohol