scholarly journals Ammonium nitrogen content regulation in sewage water at the transportation stage

2019 ◽  
Vol 698 ◽  
pp. 055044
Author(s):  
E Wilson ◽  
N Serpokrylov
Keyword(s):  
Nitrogen Content ◽  
Ammonium Nitrogen ◽  
Sewage Water ◽  
Content Regulation

The effects of ammonium and nitrate nitrogen on the growth of perennial rye grass

1936 ◽  
Vol 26 (2) ◽  
pp. 249-257 ◽  
Author(s):  
A. H. Lewis
Keyword(s):  
Nitrogen Content ◽  
Nitrate Nitrogen ◽  
Ammonium Nitrogen ◽  
Early Stages ◽  
Rye Grass

The results show clearly a more rapid and greater uptake of ammonium than of nitrate nitrogen by perennial rye grass grown in a sand-bentonite medium of pH 7·61. The extent to which the extra uptake with added ammonia was reflected in increased yields was dependent upon the age of the grass.Except in the very early stages the percentage nitrogen content of the herbage was higher where nitrate nitrogen was applied than where ammonium nitrogen was applied. This indicates that any nitrate absorbed by the plant was less, efficient in increasing yields than was ammonium nitrogen.The percentage P205 content of the grass was higher where the nitrogen was applied in the ammoniacal form than where it was applied as nitrate, and it appears that this greater P205 uptake with ammonium nitrogen resulted in increased growth.

Methods for decreasing the ammonium nitrogen content of dephenolated water from the Kiviter process

2010 ◽  
Vol 44 (1) ◽  
pp. 56-60
Author(s):  
L. V. Kekisheva ◽  
L. S. Grigor’eva ◽  
J. H. Soone ◽  
N. N. Ostroukhov ◽  
N. I. Petrovich
Keyword(s):  
Nitrogen Content ◽  
Ammonium Nitrogen

scholarly journals Comparative Analysis of the Effectiveness of Regulation of Aeration Depending on the Quantitative Characteristics of Treated Sewage Water

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Myroslav Malovanyy ◽  
Vira Shandrovych ◽  
Andriy Malovanyy ◽  
Igor Polyuzhyn
Keyword(s):  
Comparative Analysis ◽  
Dissolved Oxygen ◽  
Ammonium Nitrogen ◽  
Sewage Water ◽  
Initial Concentration ◽  
Treated Sewage ◽  
Quantitative Characteristics ◽  
Aeration Process ◽  
Effectiveness Of Regulation

Monitoring of work of the aeration tanks of operating town treatment plants is done. Based on the obtained results a conclusion has been drawn that sewage water is improperly treated from ammonium nitrogen. The velocity of the aeration process, depending on the concentration of dissolved oxygen and ammonium nitrogen, is investigated. The obtained investigation data became the basis for modeling the aeration process in industrial conditions depending on the required initial concentration of ammonium nitrogen.

Study on the Effects of Nitrogen Pollution to the Soil and Groundwater

2013 ◽  
Vol 437 ◽  
pp. 1019-1022 ◽  
Author(s):  
Xiao Hui Lu ◽  
Yang Wang
Keyword(s):  
Nitrogen Content ◽  
Nitrate Nitrogen ◽  
Flow Direction ◽  
Ammonium Nitrogen ◽  
Nitrogen Pollution ◽  
Monitoring Point ◽  
River Bank ◽  
The North ◽  
Geological Conditions ◽  
Nitrite Nitrate

Xuzhou city lies on the north of Jiangsu province, which geological conditions are complex, water resources are deficient and environment is vulnerable. At present, water pollution in Kui river area is very serious; Kui River nitrogen pollution had affected Coastal soil and chemical environment of groundwater. The monitoring sections are elected in the seriously polluted river, and downstream at the banks of river decorates with six monitoring sections. Each section from the river bank of 50m, 100m, 200m, 500m, 1000m, 1500m is arranged of monitoring points respectively, and each monitoring point is monitored for sampling test at different depths. The monitoring results of surface water showed that the content of ammonia-nitrite-nitrate was a decreasing trend along the flow direction. The nitrate nitrogen content would decrease further in December while the ammonium nitrogen content was on the rise, showing that the supplement of nitrogen pollution resources was still insufficient when the denitrification was stronger. The content of ammonium and nitrate nitrogen in soil was higher, and had some regular change features with the change of depth.

Nitrogen Transformation during Pig Manure Composting at Low Temperature

2012 ◽  
Vol 433-440 ◽  
pp. 1226-1231
Author(s):  
Shu Qin Li ◽  
Lei Yan ◽  
Jing Gang Xu ◽  
Dong Yin Liu
Keyword(s):  
High Temperature ◽  
Amino Acid ◽  
Nitrogen Content ◽  
Amino Sugar ◽  
Animal Manure ◽  
Ammonium Nitrogen ◽  
Pig Manure ◽  
Amide Nitrogen ◽  
Amino Acid Nitrogen ◽  
Unknown Form

Discharge of animal manure without treatment not only pollutes environment but also influences people health. It also hinders further development of livestock industry. Composting animal manure is one of the solutions to this problem, in which content and morphous of nitrogen play important roles that affect the compost quality. Therefore it has great meaning to study nitrogen transformation during the pig manure composting, especially at low temperature which reduces composting turnover rate. In this study, pig manure was collected as compost material. Maize stover was chosen as attendant agent. Three kinds of microbial agents (A, B, C) were inoculated into the manure to start composting at 6°C. Contrast test was performed without microbial innoculant added. Acid nitrogen and non-acid nitrogen were included in total nitrogen in the composting process. Furthermore, Amide nitrogen, amino acid nitrogen, amino sugar nitrogen, ammonium nitrogen and other unknown form acid nitrogen were included in acid nitrogen. Total nitrogen (TN) content decreased rapidly with microbial agents (A, B, C) added during the early 6d of the composting. TN content was the lowest at the stage of high temperature (6-12d) and increased quickly between 12-18d, and it became stable after 18d. Dynamics of acid nitrogen content was the same as that of TN content. Non-acid nitrogen content varied as same as the nitrogen content in contrast test. These indicated that composting microorganisms could not utilize non-acid nitrogen, so the change of TN was due to the variation of acid nitrogen. In the early stage of composting (0-6d), contents of both amide nitrogen and amino sugar nitrogen increased slowly, while contents of amino acid nitrogen and the unknown form nitrogen decreased rapidly. Moreover, ammonium nitrogen content increased quickly. It suggested that amino acid nitrogen and the unknown form nitrogen transformed into ammonium nitrogen. The decrease of acid nitrogen and TN contents were resulted from the evaporation at high temperature. In the stage of high temperature (6-12d), microorganisms grew quickly so that amide nitrogen and amino sugar nitrogen increased rapidly, which were ingredients of microorganisms. Other form nitrogen changed a little. In the stage of maturity (12-18d), contents of amide nitrogen, amino sugar nitrogen and ammonium nitrogen decreased rapidly, while the content of unknown form acid nitrogen increased quickly. Content of amino acid nitrogen grew slowly, which suggested that amide nitrogen and amino sugar nitrogen changed into unknown form acid nitrogen as well as amino acid nitrogen. As temperature decreased, contents of unknown form acid nitrogen and amino acid nitrogen increased slowly, while contents of other form nitrogen decreased after 18d. The amide nitrogen and amino sugar nitrogen contents decreased quickly at the former stage of the composting but slowly later. Content of ammonium nitrogen decreased significantly over the composting process.

scholarly journals Improving the photobioreactor operation efficiency in the technological scheme of wastewater treatment

2021 ◽  
Vol 6 (10 (114)) ◽  
pp. 6-15
Author(s):  
Sergii Shamanskyi ◽  
Sergii Boichenko ◽  
Viktoria Khrutba ◽  
Olena Barabash ◽  
Iryna Shkilniuk ◽  
...  
Keyword(s):  
Euglena Gracilis ◽  
Experimental Studies ◽  
Ammonium Nitrogen ◽  
Sewage Water ◽  
Process Efficiency ◽  
Municipal Sewage ◽  
Biogenic Elements ◽  
Working Zone ◽  
Advantages And Disadvantages ◽  
Low Efficiency

Conventional process schemes of municipal sewage water treatment, advantages, and disadvantages of the methods applied when removing biogenic elements were considered. It was shown that the existing shortcomings cause additional explicit costs and difficulties when disposing of the resulting waste. Low efficiency of the removal processes themselves causing residual concentrations of biogenic elements in the treated sewage water was also shown. A process scheme for treating municipal sewage water was proposed. It includes the use of a photobioreactor of a proposed design for the removal of biogenic elements due to the metabolism of microalgae. It was experimentally shown that the use of Euglena gracilis strain for removal of phosphates in initial concentrations of 4, 7, and 14 mg/dm3 from sewage water is the most efficient way. It makes it possible to reduce these concentrations to residual 0…0.55 mg/dm3 in four days. A 3.75…5.58 times increment of microalgae biomass during this period was also shown. A mathematical model was constructed for calculating the time of staying the sewage water and microalgae mixture in a photobioreactor to achieve the required degree of removal of biogenic elements. Based on the proposed model and experimental studies, the required time of staying in the rector working area was calculated. It was shown that with the use of Euglena gracilis strain but without removal of biogenic elements at previous purification stages (process schemes including only mechanical purification), the time of mixture staying in the working zone was 37.81 hrs. With partial removal of biogenic elements at the stage of biological treatment (0.55 mg/dm3 total nitrogen, 0.91 mg/dm3 ammonium nitrogen, 0.44 mg/dm3 phosphates), this time was reduced to 26.66 hrs. It was found that the use of Euglena gracilis strain instead of Chlorella vulgaris (FC-16) in the removal of phosphates results in a 2-time increase in the process efficiency and a 50 % decrease in time of mixture staying in the working zone. Recommendations for calculating geometric parameters of photobioreactors of the proposed design were given for use in the process schemes

scholarly journals Effects of adding different proportions of soft rock on the dynamic change of the quality of aeolian sandy soil

2021 ◽  
pp. 837-845
Author(s):  
Tingting Cao ◽  
Zhen Guo ◽  
Juan Li ◽  
Haiou Zhang ◽  
Hang Zhou ◽  
...  
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Carbon Content ◽  
Nitrogen Content ◽  
Root System ◽  
Soft Rock ◽  
Ammonium Nitrogen ◽  
Organic Carbon Content ◽  
Significant Difference

Evolution process of quality of soft rock and sand compound soil and exploration of its stability were studied. In the present study different proportions (1 : 1, 1 : 2, 1 : 5, 0 : 1) of soft rock and sand compound soil as the research object were selected. Tthe particulate organic carbon, microbial organic carbon, effective phosphorus, quick-acting potassium, nitro nitrogen and ammonium nitrogen in the compound soil were analyzed. Results showed that after 9 years of planting, the organic carbon content of particles with 0 : 1 treatment was the lowest, at 1.73 g/kg, and the treatment of 1 : 5 and 1 : 1 increased significantly by 74.74 and 94.90%, respectively. In the 20 - 30 cm soil layer, the lowest organic carbon content of particles with 1 : 2 treatment was 1.92 g/kg, and there was no significant difference between the other three treatments, with 0 : 1, 1 : 5 and 1 : 1 treatment increased by 46.20, 29.27 and 34.07%, respectively compared to 1 : 2 treatment. With developed root system, the biomass of the root system was greater than the biomass left on the ground after harvest, and the average content of organic carbon of the particles increased first and then decreased later. The microbial community in the compound soil was significantly improved, and the carbon content of microorganisms in the treatment of 1 : 1, 1 : 2 and 1 : 5 was significantly higher than that of whole sand by 85, 165 and 143%, respectively, after multi-year of cultivation. The soil root microbial community showed a benign development. With the increase of planting years, the incorporation of soft rock accelerates the process of natural succession of soil quality. Compared with sandy land, compound soil has significantly improved storage of available phosphorus and available potassium nutrients. Compound soil has been cultivated for 9 years compared with 6 years, with the ratio of 1 : 1, 1 : 2, 1 : 5 and 0 : 1, the effective phosphorus content increased significantly by 141, 181, 169 and 63% respectively, the available potassium content increased significantly by 141, 181, 169 and 63% respectively. Compound soil has been cultivated for 9 years compared with 6 years, with the ratio of 1 : 1, 1 : 2, 1 : 5, and 0 : 1, the nitrate nitrogen content increased significantly by 40, 130, 135 and 120%, respectively. Nitro nitrogen is easily soluble in water, and the higher the proportion of sand in the compound soil, the easier the loss of nitrous nitrogen content in the soil. After multiple years of cultivation, the ammonium nitrogen content in the compound soil decreased, with a significant decrease of 35 (p < 0.05), 34 (p < 0.05), 45 (p < 0.05) and 37% (p < 0.05), respectively. Due to the disruption of harvest, the exposure of the surface soil is high, which causes ammonium nitrogen to evaporate. Bangladesh J. Bot. 50(3): 837-845, 2021 (September) Special

Sign in / Sign up

Export Citation Format

Share Document