Two granular sludge sequencing batch reactors (GSBR) with alternating anoxic/aerobic (R1) and anaerobic/aerobic (R2) conditions were operated with a 4-carbon-source synthetic influent. The physical properties of the granular sludge were very good (SVI ≈ 20 mL g−1) and high solid concentrations (up to 35 g L−1) were obtained in the bioreactor operated with a pre-anoxic phase with additional nitr...

Analytical methods applicable to different organic wastes are needed to establish the extent to which readily biodegradable organic matter has decomposed (i.e., biological stability). The objective of this study was to test a new respirometric method for biological stability determination of organic wastes. Dynamic respiration index (DRI) measurements were performed on 16 organic wastes of diff...

During recent studies of oxidative phosphorylation in rat liver mitochondria (2, 3)) we observed that preparations isolated with meticulous care catalyzed a significant uptake of inorganic orthophosphate in the absence of any added substrate. Although incidental observations of endogenous activity of isolated mitochondria have been noted by others (P9), no extensive study of this phenomenon has...

Background Charcot-Marie-Tooth (CMT) disease is a hereditary neuropathy associated with impaired walking capacity. Some patients are too weak in the lower extremity muscles to walk at gravity with sufficient intensity or duration to gain benefit. Aim The aim was to investigate the effect of aerobic anti-gravity exercise in weak patients with CMT 1A and X. Methods Five adult patients perform...

A biotechnology for aerobic conversion of food waste into organic fertilizer under controlled aeration, stirring, pH and temperature at 55-65 degrees C, is proposed. To maintain neutral pH at the beginning of the bioconversion 5% CaCO3 was added to the total solids of the food waste. The addition of 20% horticultural waste compost as a bulking agent to the food wastes (w.w./w.w.), improved the ...

Infection of Escherichia coli cells by T4 phage at a multiplicity of infection (MOI) of 0.01 caused inhibition of cell lysis for up to 4 h. Such cells grown under aerobic condition were lysed by external stimuli such as cold shock, osmotic shock or addition of toxic substances, e.g., carbonyl cyanide m-chlorophenylhydrazone (CCCP). However, the effects of these external stimuli were reduced by ...

Deammonification is known as an efficient and resource saving sidestream process option to remove the nitrogen load from sludge liquors. The transfer of the intermediate product nitrite between both syntrophic groups of organisms - aerobic and anaerobic ammonia oxidizers (AOB) - appears very sensitive to process conditions such as temperature, dissolved oxygen (DO) and operating nitrite level. ...

The enrichment of enhanced biological phosphorus removal (EBPR) sludge with Tetrasphaera was obtained for the first time using glutamate as sole carbon source. Two configurations were tested, an SBR with anaerobic/aerobic sequence and a continuous anaerobic/anoxic/aerobic (A/O) pilot plant. Better results and improved stability was obtained in the continuous A/O operation. Accumulibacter were a...

The aerobic oxidation of sulfite thus provides a magnified manometric response to the chain initiating event. Advantage was taken of this circumstance to develop an ultrasensitive assay for milk xanthine oxidase (5). The data obtained were consistent with the hypothesis that xanthine oxidase, when acting on purine substrates, initiates the aerobic oxidation of sulfite by the generation of free ...

Sulfonated reactive azo dyes, such as Reactive Orange 107, are extensively used in textile industries. Conventional wastewater treatment systems are incapable of degrading and decolorizing reactive azo dyes completely from effluents, because of their stability and resistance to aerobic biodegradation. However, reactive azo dyes are degradable under anaerobic conditions by releasing toxic aromat...