Thiocapsa roseopersicina, Phototrophic Bacteria, Nitrogen Sources, Ammonia Assimilation, Carbon Metabolism Batch cultures of the phototrophic bacterium, Thiocapsa roseopersicina, were grown anaero­ bically in the light either on sulfide with various ammonia concentrations, N 2 or amino acids as nitrogen sources, or on several simple organic substrates in the absence of reduced sulfur com­ pound...

Anhydrous ammonia has higher concentrations of nitrogen (82% N) than urea (46% N), is usually more economical, has lower labour requirements for application and is less prone to volatilisation. It has also been shown that ammonia has nematicidal properties. It would be of great benefit to the sugar industry if anhydrous ammonia could be applied as both a fertiliser and as a nematicide for the s...

The effect of feeding chopped and unchopped groundnut haulm (Harawa) on nutrient intake, metabolism utilization was determined in 24 (12 each male female) growing Yankasa lambs. Feeding harawa significantly (P 0.05) Increased feed the digestibility nutrients liveweight gains. It also had an ap­preciable nitrogen retention pro­duction total rumen nitrogen, ammonia-nitrogen volatile fatty acids. ...

Series of Copper Ruthenium (Cu-Ru) bimetallic catalysts supported on γ-Al2O3 with different metal loading are prepared and investigated for catalytic wet air oxidation of ammonia to nitrogen. The ammonia decomposition activity was studied at three different temperatures i.e. 150oC, 200oC, and 230 oC and it is found that catalytic activity increases with the increase in temperature along with th...

In this work a set of experiments was undertaken in a pilot-scale WSP system to determine the importance of organic nitrogen sedimentation on ammonium and total nitrogen removals in maturation ponds and its seasonal variation under British weather conditions, from September 2004 to May 2007. The nitrogen content in collected sediment samples varied from 4.17 to 6.78 percent (dry weight) and cal...

The feasibility of biogas stripping to remove ammonia in the anaerobic digestion of source segregated food waste was investigated. It was found in batch experiments that ammonia could be removed from digestate and that the removal followed 1 order kinetics with respect to total ammonia nitrogen concentration. Increasing temperature, biogas flow rate and initial pH all increased removal rates. U...

A new hybrid membrane-aerated biofilm reactor (MABR) technology that enables energy-neutral treatment of municipal wastewater is introduced. The process, which removes nitrogen using conventional nitrificationdenitrification, was demonstrated at pilot-scale, treating primary effluent. The new MABR membrane product can operate in a high mixed liquor suspended solids (MLSS) environment, making it...

The effects of feeding frequency on the specific dynamic action of the juvenile snakehead were examined. The fish were fed at four different frequencies with the same total meal intakes (4% body mass), and the postprandial oxygen consumption rate and ammonia excretion rate were determined for two days. The durations of oxygen consumption and ammonia excretion significantly increased with increa...

LOTSPEICH, WILLIAM D. Renal hypertrophy in metabolic acidosis and its relation to ammonia excretion. Am. J. Physiol. 208(6) : I 135-1142. 1 g65.-The chronic ingestion of NH&l causes a true growth of the rat kidney. This involves a symmetrical increase in wet weight, dry weight, and nitrogen of the kidney tissue. Total DNA and RNA are also elevated, indicating that both cell numbers and cell siz...

Removal of nitrogen and phosphorus is known to be somewhat problematic in vertical subsurface flow (VSSF)constructed wetlands. In this pilot-scale study, two planted (Typha latifolia L. [cattail]) VSSF-constructed wetlands A (with polypropylene pellets) and B (without polypropylene pellets) and one unplanted control C (without polypropylene pellets) were designed to test the contribution of pol...