《傳播學大師訪談錄 - 《傳播與社會學刊》創刊十週年文集》，香港: 香港中文大學出版社。
Biofilm development from bacterial expansion and colonization is usually a regarded trigger for membrane effectiveness deterioration in drinking water treatment. A broad-spectrum biocide including silver nanoparticles (Ag NPs) is normally additional into the membrane to impart biofilm resistance. Mainly because biofilm development commences With all the membrane surface area in contact with the feedwater, a significant loading of uniformly dispersed Ag nanoparticles (Ag NPs) on the membrane exterior surface area is attractive for a superb antimicrobial effectiveness. This was achieved During this do the job by a brief alkaline treatment of the hydrolyzable membrane (polyacrylonitrile, PAN) to introduce damaging cost into the area.
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With rising fears about the worldwide energy crisis and local weather transform, the main target on wastewater cure has shifted towards producing more Power-efficient and cost-effective techniques. Anaerobic therapy is viewed as a possibility for employing the wastewater as being a source for Power recovery. The main aim of this chapter is within the anaerobic procedures to the treatment method of low-power wastewaters, their present position, and new developments.
Consequences of CeO2 nanoparticles on technique effectiveness and bacterial Group dynamics within a sequencing batch reactor
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Denaturing gradient gel electrophoresis Investigation confirmed remarkable adjustments in the bacterial community structure during the activated sludge following publicity to CeO2 NPs. CeO2 NPs ended up proficiently taken out in the SBR generally by using sorption on to the sludge. Having said that, the elimination effectiveness lowered from ninety five to 80% over 30 days. Mass equilibrium evaluation showed that nearly 50% of your NPs ended up gathered inside the activated sludge and were being taken off While using the squander sludge.
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coli and bovin serum albumin (BSA). Amongst them, the silver-PEGylated dendrimer nanocomposite membrane is subjected on the least fouling by the most fouling reduction of 99.8%. In particular, as a novel energy of the review, AFM power measurements were performed on membrane surfaces to study the interactions involving protein and different surfaces. The adhesion force among the amine-functionalized floor along with the idea implies that the electrostatic interactions involving the amine-modified membrane is quite potent, causing a quick Preliminary deposition of proteins on the membrane area. The adhesion forces for PEG and silver nanoparticle modified membranes are smaller, which effectively demonstrate the decrease protein fouling from the membranes.
The results of CeO2 nanoparticles (NPs) on the technique functionality along with the bacterial Neighborhood dynamics inside of a sequencing batch reactor (SBR) ended up investigated, along with the destiny and removing of CeO2 NPs in the SBR. Sizeable impression was observed on nitrification; NH4(+)-N removing efficiency lessened from Practically 100% to all-around 70% right after 6 days of continuous exposure to one.0 mg/L of CeO2 NPs, followed by a gradual Restoration until a stable worth of about ninety% following twenty times. Also, CeO2 NPs also resulted in a significant rise in the protein written content during the soluble microbial products, showing the disruptive effects of CeO2 NPs to the extracellular polymeric compound matrix and connected activated sludge structure.
Polymerase chain reaction–Denaturing gradient gel electrophoresis revealed that silver nanoparticles brought on considerable shifts in bacterial community constructions. Distinct species had been influenced and removed at each dosage of silver nanoparticles. Silver nanoparticles had been effectively eliminated during the bioreactor, with the key removing pathway remaining deposited during the activated sludge.
The kinetics of organic carbon and ammonia removals within the MBBR was analyzed depending on the Stover-Kincannon product as well as the 1/two get substrate removal model, respectively. Temperature coefficient "θ" was released into your COD and ammonia elimination designs to describe the effects of the temperature. The model simulated outcomes showed very good agreements with experimental benefits. The product may very well be utilized for the design of a full-scale MBBR procedure for simultaneous elimination of natural and organic carbon and ammonia from swine wastewaters.
O3/UV/H2O2 advanced oxidation method (AOP) was utilized to degrade antibiotic berberine hydrochloride (BH) in pharmaceutical wastewater. The consequences of Original Answer pH, H2O2 dosage and O3 dosage around the berberine hydrochloride removal effectiveness had been investigated with synthetic wastewater.