The effect of different light spectra on selenium bioaccumulation by cyanobacteria in flat plate photobioreactors.

Selenium (Se) plays a crucial role in human health, influencing conditions such as cancer, diabetes, and neurological disorders. With global population growth and unequal nutrient distribution threatening food security, new approaches are needed to meet the nutritional needs of the world. Se is essential for immune function, metabolism, and antioxidant defense, and in regions suffering from food insecurity and malnutrition, selenium-enriched food could offer an affordable solution.

Mitigating membrane fouling in an internal loop airlift membrane photobioreactor containing : effects of riser cross-sectional area and hydrophilic baffles.

Membrane photobioreactors (MPBRs) have gained significant attention due to their ability to support microalgae activities such as cultivation, harvesting, and production of beneficial products. Despite various efforts to mitigate membrane fouling, a fundamental issue in membrane processes, in these systems, a cost-effective and less energy-consuming method is still needed. This study examines the impact of the cross-sectional area of the riser and the baffle material on membrane fouling in an internal loop airlift MPBR.

Folic acid conjugated poly (Amidoamine) dendrimer grafted magnetic chitosan as a smart drug delivery platform for doxorubicin: In-vitro drug release and cytotoxicity studies.

This study reports the development of a magnetic and pH-responsive nanocarrier for targeted delivery and controlled release of doxorubicin (DOX). A multifunctional magnetic chitosan nanocomposite (FA-PAMAMG2-MCS) was fabricated by grafting poly(amidoamine) dendrimer and folic acid onto the MCS surface for active targeting. DOX was loaded into this core-shell bio-nanocomposite via adsorption.

Assessment of various colored lights on the growth pattern and secondary metabolites synthesis in .

Cyanobacteria are photosynthetic aquatic microorganisms with light and dark photosynthesis reactions. In the present study, the effect of various light spectrums on light and dark reactions in was investigated. Chlorophyll and phycocyanin as light reaction pigments and vitamin B as a product of dark reaction were examined.

The comparison between two methods of membrane cleaning to control membrane fouling in a hybrid membrane photobioreactor (HMPBR).

In this study, the effect of two membrane cleaning methods, such as aeration and addition of granular particles in a hybrid membrane photobioreactor (HMPBR) including Spirulina sp. with the concentration of 1.5 g·L was investigated.

Effect of various light spectra on amino acids and pigment production of using flat-plate photobioreactor.

Today, the use of nutrients derived from natural bioactive compounds application in the food, pharmaceutical, and cosmetic industries is on the increase. This paper aimed to evaluate the amino acids profile (essential and non-essential) and pigments composition (chlorophyll , carotenoids, and phycocyanin) of (a blue-green microalga) cultivation in a flat-plate photobioreactor under various types of light-emitting diodes (red: 620-680 nm, white: 380-780 nm, yellow: 570-600nm, blue: 445-480 nm). The maximum biomass concentration (604.

Performance Assessment of a Novel Pyramid Photobioreactor for Cultivation of Microalgae Using External and Internal Light Sources.

The cultivation of sp., the most abundant microalga in the Persian Gulf, took place in a novel pyramid photobioreactor (PBR), a modified version of plate PBR, consisting of four completely separate equal-volume chambers. In this study we used two light sources incident in each chamber: light-emitting diode (LED) at various wavelengths (red, white and blue) of 108 µmol/(m·s) photosynthetic photon flux density as internal lighting, and the same photon flux density for external white lighting.

Effect of light/dark cycle on nitrate and phosphate removal from synthetic wastewater based on BG11 medium by sp.

In this study, microalgae growth in the synthetic wastewater and their ability to remove nutrients under different light levels was investigated. For this purpose, a comparative study was conducted on freshwater microalgae sp. to evaluate their performance to remove nitrate and phosphate from both slaughterhouse and dairy synthetic treated wastewaters, under different light/dark cycles (12/12, 16/8 and 24/0 h), in Erlenmeyer flasks.

Treatment of paper-recycling wastewater by electrocoagulation using aluminum and iron electrodes.

Treatment of industrial wastewater by electrocoagulation (EC) is one of the most efficient methods to remove pollutants. Paper-recycling wastewater is a complex mixture containing toxic and recalcitrant substances, indicating complexity and difficulty of its treatment. The aim of the present study was to assess the effectiveness of paper-recycling wastewater treatment by EC process using aluminum (Al) and iron (Fe) plate electrodes.

Application of response surface methodology (RSM) for optimizing coagulation process of paper recycling wastewater using .

The wastewater produced in a pulp and paper industry is one of the most polluted industrial wastewaters, and therefore its treatment requires complex processes. One of the simple and feasible processes in pulp and paper wastewater treatment is coagulation and flocculation. Overusing a chemical coagulant can produce a large volume of sludge and increase costs and health concerns.

Dielectric monitoring and respirometric activity of a high cell density activated sludge.

A novel method was developed to assess the viability of activated sludge present in a biological wastewater treatment process and signify its distinction from respirometric activity. The respirometric activity and viability of activated sludge at high cell density, such as typically encountered in membrane bioreactors, were investigated in batch and fed-batch systems. The method for measuring the viability of activated sludge was based on the sludge permittivity monitored online by a capacitive sensor.

Biomass characterization by dielectric monitoring of viability and oxygen uptake rate measurements in a novel membrane bioreactor.

The application of permittivity and oxygen uptake rate (OUR) as biological process control parameters in a wastewater treatment system was evaluated. Experiments were carried out in a novel airlift oxidation ditch membrane bioreactor under different organic loading rates (OLR). Permittivity as representative of activated sludge viability was measured by a capacitive on-line sensor.