Track topics on Twitter Track topics that are important to you
Solution culture experiments were conducted to investigate the effect of wastewater nitrogen levels and NH/NO on nitrogen removal ability and the nitrogen component of . Experiments with three nitrogen levels and NH/NO were set up as follows:20, 100, and 200 mg·Land NH/NO 1:0, 0.5:0.5, and 0:1. The results showed that the biomass of plants increased fastest during the first week. The plants treated with NH/NO=1:0 with nitrogen levels of 20 and 100 mg·L and those treated with NH/NO=0.5:0.5 with a nitrogen concentration of 200 mg·L exhibited higher biomass than the others. The removal rates of water total nitrogen, ammonium nitrogen, and nitrate nitrogen during the first week were the maximum for all treatments and increased with water nitrogen levels. There were no significant differences in the removal rate between ammonium nitrogen and nitrate nitrogen with a nitrogen level of 20 mg/L, while with nitrogen levels of 100 and 200 mg·L, the nitrate removal rates were higher than those for ammonium nitrogen. The nitrogen accumulation and its contribution rate to nitrogen removal from water and sediment were all increased with water nitrogen levels and increased fastest during the first week. The contribution rate of nitrogen accumulated by plants with NH/NO=0:1 was the highest with nitrogen levels of 20 mg·L, while plants with NH/NO=0.5:0.5 were the highest with nitrogen levels of 100 and 200 mg·L. The protein, amino, and nitrate nitrogen contents in plants were all increased by increasing water nitrogen levels with a ranking of protein content > amino nitrogen content > nitrate nitrogen content. The protein concentrations in plants with NH/NO=1:0 and NH/NO=0.5:0.5 were higher regardless of water nitrogen levels, while the amino nitrogen concentration in plants with NH/NO=1:0 and the nitrate nitrogen content in plants with NH/NO=0:1 were higher than the others. It was concluded that the nitrogen removal ability of was improved by raising water nitrogen levels under the tested condition, which indicates that could purify high nitrogen wastewater. is an ammonium-nitrophile, but had the strongest capacity for growing and removing wastewater nitrogen exhibited with higher than 100 mg·L nitrogen levels only with equal NH to NO. The nitrogen component concentrations of protein, amino, and nitrate in plant were all affected by the ratio of NH/NO.
This article was published in the following journal.
Name: Huan jing ke xue= Huanjing kexue
An integrated partial nitrification anaerobic ammonia oxidation reactor was used to explore the feasibility of nitrogen removal from recycled ethanol wastewater. The results show that the integrated p...
The effect of pH shock on nitrogen removal performance of marine anaerobic ammonium-oxidizing bacteria (MAAOB) treating saline wastewater was studied by employing an ASBR reactor. Dynamic characterist...
Nitrogen removal by a newly discovered sp. strain, DK1, isolated from activated sludge was investigated. Using glucose as a carbon source and a (C)/(N) ratio of five, batch experiments showed that th...
The discovering of Anaerobic Ammonium Oxidation (anammox) process led to the development of autotrophic nitrogen removal systems for the treatment of effluents with low C:N rate. The anammox processes...
High salt content could result in the inhibition of microbes and affect biological treatment processes. At present, an important research topic is how to improve the efficiency of biological treatment...
The study is designed to investigate the influence of parenteral nutrition (PN) with low nitrogen and calorie supply on the clinical outcome of patients after an operation compared to that...
The purpose of the study was to see if liquid nitrogen, a commonly used treatment for warts, is more effective if it is used alone, or if it is more effective if combined with cantharidin,...
This study evaluates the performance of new technology "CRYOTHERAPY MAINS ET DECOLLETE" against a classic cryotherapy "Nitrogen Liquid " to treat solar lentigines. The hands and the neckl...
This study is designed to determine if the following are true. When protein requirements exceed metabolic requirements, blood urea nitrogen(BUN) levels will rise. Elevated BUN levels in t...
This study will evaluate the efficacy, tolerability and safety of the topical application of nitrogen mustard (NM) ointment formulations in patients with stage I or IIA mycosis fungoides (...
Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic weight. N-15 is a stable nitrogen isotope.
The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to biologically usable forms of nitrogen, such as AMMONIA; NITRATES; and amino compounds.
Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic weights 12, 13, 16, 17, and 18 are radioactive nitrogen isotopes.
The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984)
The circulation of nitrogen in nature, consisting of a cycle of biochemical reactions in which atmospheric nitrogen is compounded, dissolved in rain, and deposited in the soil, where it is assimilated and metabolized by bacteria and plants, eventually returning to the atmosphere by bacterial decomposition of organic matter.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...