scholarly journals Role of pH on biological Nitrification Process

1970 ◽  
Vol 8 (1-2) ◽  
pp. 119-125 ◽  
Author(s):  
Iswar Man Amatya ◽  
Bhagwan Ratna Kansakar ◽  
Vinod Tare ◽  
Liv Fiksdal
Keyword(s):  
Filtration Rate ◽  
Ammonia Oxidation ◽  
Ammonia Nitrogen ◽  
Microbial Kinetics ◽  
Nitrification Process ◽  
Nitrogen Concentrations ◽  
In Series ◽  
Biological Nitrification ◽  
Oxidation Efficiency ◽  
Nitrate And Nitrite

It is important to determine the effect of changing environmental conditions on the microbial kinetics for design and modeling of biological treatment processes. In this research, the kinetics of ammonia oxidation by nitrifying process bacteria under varying pH and temperature conditions are studied. Ammonia oxidation in groundwater was carried out by biological method of nitrification process. The nitrification was performed in one set of reactors. The reactor consists of two columns connected in series packed with over burnt bricks as media. The filtration rate varied from 10.5 to 210.4 m/day for nitrification process respectively. The ammonia, nitrate and nitrite nitrogen concentrations were measured at inlet, intermediate ports and outlet. The temperature varied from 10 to 30°C at 2°C intervals. The results demonstrated that high amounts of ammonia nitrogen nitrified in groundwater at nitrification process. The average ammonia nitrogen oxidation efficiency of 77.27% was achieved from pH 7.3 to 8.0 in the reactor packed with OBB media at 20°C, for the flow rate 500ml/min due to biological nitrification. The total amount of ammonia nitrogen removed by nitrification varied from 0.76 to 17.80 gm/m3/h at influent concentration from 2.84 to 149.28 gm/m3/h.Key words: Over burnt brick; Filtration rate; Temperature; Nitrification and Nitrifying bacteriaDOI: http://dx.doi.org/10.3126/jie.v8i1-2.5102Journal of the Institute of Engineering Vol. 8, No. 1&2, 2010/2011Page: 119-125Uploaded Date: 20 July, 2011

scholarly journals Impact of Temperature on Biological Denitrification Process

1970 ◽  
Vol 7 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Iswar Man Amatya ◽  
Bhagwan Ratna Kansakar ◽  
Vinod Tare ◽  
Liv Fiksdal
Keyword(s):  
Filtration Rate ◽  
Nitrate Nitrogen ◽  
Nitrate Removal ◽  
Biological Method ◽  
Biological Denitrification ◽  
Nitrite Nitrogen ◽  
Nitrogen Concentrations ◽  
In Series ◽  
Nitrate And Nitrite ◽  
Denitrification Process

Nitrate removal in groundwater was carried out by biological method of denitrification process. The denitrification and without denitrification were performed in two different sets of reactors. Each reactor consists of two columns connected in series packed with over burnt bricks as media. The filtration rate varied from 5.3 to 52.6 m/day for denitrification process. The ammonia, nitrate and nitrite nitrogen concentrations were measured at inlet, intermediate ports and outlet. The temperature varied from 10 to 30°C at 2°C intervals. The results demonstrated that high amount of nitrate nitrogen removed in groundwater at denitrification process. The nitrate nitrogen removed by denitrification varied from 3.50 to 39.08 gm/m3/h at influent concentration from 6.32 to 111.04 gm/m3/h. Denitrification was found more significant above 16°C.Key words: Over burnt brick, Denitrification, Filtration rate and TemperatureJournal of the Institute of Engineering, Vol. 7, No. 1, July, 2009 pp. 121-126doi: 10.3126/jie.v7i1.2070 

scholarly journals Experimental research on the treatment of low C/N wastewater by SBBR-UASB combined process

2020 ◽  
Vol 218 ◽  
pp. 03027
Author(s):  
Yafeng Li ◽  
Huixue Hu ◽  
Jianbo Wu
Keyword(s):  
Ammonia Oxidation ◽  
Ammonia Nitrogen ◽  
Uasb Reactor ◽  
Stable Operation ◽  
Coupling Mechanism ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Oxidation Stage ◽  
In Series ◽  
Two Stages

The research takes low C/N ratio and high ammonia nitrogen sewage as the treatment object, connects the SBBR reactor and UASB reactor after stable operation in series, and studies the PN-ANAMMOX coupling mechanism. The research analyze the effect of the influencing factors of the nitrification process on the subsequent anaerobic ammonia oxidation stage. The two stages adapt to each other that constantly debug and run. The research investigate its denitrification effect, analyze the biological denitrification mechanism and determine the optimal working conditions.

scholarly journals Application of the Anammox in China—A Review

2020 ◽  
Vol 17 (3) ◽  
pp. 1090 ◽  
Author(s):  
Ruolan Wen ◽  
Yue Jin ◽  
Wenjie Zhang
Keyword(s):  
Ammonia Oxidation ◽  
Wastewater Treatment Plants ◽  
Ammonia Nitrogen ◽  
Capital Costs ◽  
Greenhouse Gases Emissions ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Nitrogen Concentrations ◽  
Anammox Process ◽  
Selection Of

Anaerobic ammonia oxidation (anammox) has been one of the most innovative discoveries for the treatment of wastewater with high ammonia nitrogen concentrations. The process has significant advantages for energy saving and sludge reduction, also capital costs and greenhouse gases emissions are reduced. Recently, the use of anammox has rapidly become mainstream in China. This study reviews the engineering applications of the anammox process in China, including various anammox-based technologies, selection of anammox reactors and attempts to apply them to different wastewater treatment plants. This review discusses the control and implementation of stable reactor operation and analyzes challenges facing mainstream anammox applications. Finally, a unique and novel perspective on the development and application of anammox in China is presented.

scholarly journals Nitrification Process in a Nuclear Wastewater with High Load of Nitrogen, Uranium and Organic Matter under ORP Controlled

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1607
Author(s):  
Mariano Venturini ◽  
Ariana Rossen ◽  
Patricia Silva Paulo
Keyword(s):  
Ammonia Oxidation ◽  
High Load ◽  
Nuclear Fuels ◽  
Monod Model ◽  
Nernst Equation ◽  
Nitrification Process ◽  
Real Wastewater ◽  
High Concentrations ◽  
Wastewater Samples ◽  
Very High

To produce nuclear fuels, it is necessary to convert uranium′s ore into UO2-ceramic grade, using several quantities of kerosene, methanol, nitric acid, ammonia, and, in low level, tributyl phosphate (TBP). Thus, the effluent generated by nuclear industries is one of the most toxic since it contains high concentrations of dangerous compounds. This paper explores biological parameters on real nuclear wastewater by the Monod model in an ORP controlled predicting the specific ammonia oxidation. Thermodynamic parameters were established using the Nernst equation to monitor Oxiders/Reductors relationship to obtain a correlation of these parameters to controlling and monitoring; that would allow technical operators to have better control of the nitrification process. The real nuclear effluent is formed by a mixture of two different lines of discharges, one composed of a high load of nitrogen, around 11,000 mg/L (N-NH4+-N-NO3−) and 600 mg/L Uranium, a second one, proceeds from uranium purification, containing TBP and COD that have to be removed. Bioprocesses were operated on real wastewater samples over 120 days under controlled ORP, as described by Nernst equations, which proved to be a robust tool to operate nitrification for larger periods with a very high load of nitrogen, uranium, and COD.

Removal of Ammonia Nitrogen from Domestic Wastewater Using Vertical Aerated Limestone Filter

2015 ◽  
Vol 752-753 ◽  
pp. 232-237
Author(s):  
Rafidah binti Hamdan ◽  
Izzati Izwani Ibrahim ◽  
Ain Nabila Abdul Talib
Keyword(s):  
Dissolved Oxygen ◽  
Water Body ◽  
Nutrient Removal ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Maintenance Cost ◽  
Effluent Quality ◽  
Filter System ◽  
Nitrification Process ◽  
Final Effluent

Nitrogen is a naturally occurring element that is essential for growth and reproduction in both plants and animals. Excessive concentrations in the water body can cause excessive growth of algae and other plants, leading to accelerate eutrophication of lakes, and occasional depletion of dissolved oxygen. To remove nitrogen conventionally from domestic wastewater requires a high cost technology due to consumption of chemicals, high operational and maintenance cost. Therefore, an alternative low cost treatment technology particularly for nutrient removal including nitrogen removal system has been developed to improve the final effluent quality that is an aerated rock filter system. However, the optimization study under warm climate has not yet been developed. Hence, the present study was carried out to investigate the removal of ammonia nitrogen (AN) from domestic wastewater through nitrification process using a lab-scale vertical aerated limestone filter. Domestic wastewater sample used in this study was collected from Taman Bukit Perdana Wastewater Treatment Plant (WWTP), Batu Pahat, Johor owned by IWK. The experiment has been carried out for 10 weeks. The influent and effluent of the vertical aerated limestone filter system have been sampled and analyzed on biweekly basis for selected parameters including AN, Total Kjedhal Nitrogen (TKN), pH, alkalinity, temperature and dissolved oxygen to monitor the effectiveness of the filter. Results from this study show that nitrification process has took place within the aerated limestone filter as the results from laboratory experiments show that AN in wastewater was oxidized to nitrate and efficiently removed as the removal of AN was ranged from 85 % to 92 % and the removal percentage of TKN was ranged from 83.52 % - 91.67 %. The temperature was in the average of 26.3oC±0.75, pH value average of , DO was from 6.64 mg/L to 7.75 mg/L , and the alkalinity was from 15 to 110 mg / l as CaCO3 . Therefore, from this study it can be concluded that aerated rock filter system has high potential in removing AN and TKN. It is also able to produce a good final effluent quality which is comply with the effluent requirement for nutrient removal in wastewater under the Environmental Quality Act (Sewage) Regulations, 2009 that is safe to be released to the water body.

scholarly journals In Vitro Screening of Plant Materials to Reduce Ruminal Protozoal Population and Mitigate Ammonia and Methane Emissions

Fermentation ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 166
Author(s):  
Pichad Khejornsart ◽  
Anusorn Cherdthong ◽  
Metha Wanapat
Keyword(s):  
Organic Matter ◽  
Methane Emissions ◽  
Ammonia Nitrogen ◽  
Rumen Fermentation ◽  
Gas Production ◽  
Plant Materials ◽  
Tropical Plants ◽  
Nitrogen Concentrations ◽  
Tropical Climates

Alternative feed sources can be utilized to reduce enteric methane (CH4) emissions, a major greenhouse gas that contributes to global warming. This study aimed to evaluate the potential use of tropical plants to improve digestibility, reduce protozoal populations, improve rumen fermentation, and minimize methane emissions from ruminants. The plants considered herein grow in tropical climates, are easily accessible in large quantities, and are directly related to human food production. Nine plants that grow naturally in tropical climates were assessed. Plant supplementation substantially enhanced accumulative gas production at 24 h (p < 0.05). The apparent organic matter digestibility (AOMDvt) of the diet was not affected by five of the nine plants. With the addition of the plant material, ammonia nitrogen concentrations were reduced by up to 47% and methane concentrations were reduced by 54%. Five of the nine plant materials reduced methane production in terms of CH4/dry matter and CH4/digestibility of the organic matter by 15–35% and 8–24%, respectively. In conclusion, supplementation with plants with high tannin contents was shown to be a viable strategy for improving rumen fermentation, reducing protozoal populations, and limiting methane emissions. In this regard, the leaves of Piper sarmentosum, Acmella oleracea, Careya arborea, and Anacardium occidentale were especially promising.

Identifying water factors that are related to ammonia nitrogen concentrations in Columbia River using a reversed hazard exponential model

2021 ◽  
Author(s):  
Danrley Abreu dos Santos ◽  
Andrey Cassiano Martins ◽  
Kauana Mara Silva ◽  
Amanda Correa Nunes ◽  
Yara Campos Miranda ◽  
...  
Keyword(s):  
Columbia River ◽  
Exponential Model ◽  
Ammonia Nitrogen ◽  
Nitrogen Concentrations

Indole degrading of ammonia oxidizing bacteria isolated from swine wastewater treatment system

2009 ◽  
Vol 59 (12) ◽  
pp. 2405-2410 ◽  
Author(s):  
Ping Li ◽  
Lei Tong ◽  
Kun Liu ◽  
Yanhong Wang ◽  
Yanxin Wang
Keyword(s):  
Wastewater Treatment ◽  
Biochemical Analysis ◽  
Ammonia Oxidation ◽  
Treatment System ◽  
Swine Wastewater ◽  
Ammonia Oxidizing Bacteria ◽  
16S Rdna Gene ◽  
Wastewater Treatment System ◽  
Nitrate And Nitrite ◽  
Physiological And Biochemical

Three new strains named LPA11, LPB11 and LPC24 were isolated to investigate the patterns of indole degradation and ammonia oxidation in swine wastewater from different parts of a swine wastewater treatment system by the direct spreading plate method. These three isolates were all identified as Pseudomonas putida based on 16S-rDNA gene sequences, main physiological and biochemical analysis. They were capable of decomposing 1.0 mM indole completely in 10, 16 and 18 days respectively. According to the results of HPLC and GC/MS, the possible pathway for the degradation was via oxindole, isatin and anthranilic acid. The three bacteria were capable of oxidizing ammonia, and the strains LPA11 and LPC24 were capable of effectively reducing nitrate and nitrite.

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