scholarly journals Investigating organic nitrogen production in activated sludge process: Size fraction and biodegradability

2021 ◽  
Vol 773 ◽  
pp. 145695
Author(s):  
Ruchi Joshi ◽  
Murthy Kasi ◽  
Tanush Wadhawan ◽  
Eakalak Khan
Keyword(s):  
Activated Sludge ◽  
Organic Nitrogen ◽  
Size Fraction ◽  
Activated Sludge Process

Étude comparative de trois modèles dynamiques de boues activées

1989 ◽  
Vol 16 (3) ◽  
pp. 400-407 ◽  
Author(s):  
D. Couillard ◽  
F. D'amours ◽  
G. Patry
Keyword(s):  
Mathematical Model ◽  
Sensitivity Analysis ◽  
Water Treatment ◽  
Activated Sludge ◽  
Organic Nitrogen ◽  
Dynamic Models ◽  
Dynamic Modelling ◽  
Activated Sludge Process ◽  
Transient Behaviour ◽  
Soluble Material

Three complete dynamic models are proposed to simulate the transient behaviour of the activated sludge process. The authors compare the responses obtained by simulation with datas found in the literature for the Norwich wastewater plant (England). A structured biological model with bi-substrate component (particles and soluble material) together with a nitrification model taking into account the organic nitrogen content of the affluent present the most realistic profils for the conditions studied. A sensitivity analysis reveals that a generalization of the model is possible if some parameters identified as critical are adjusted. Key words: mathematical model, activated sludge, water treatment, dynamic modelling, comparison of models.

Enhanced biodegradation of organic nitrogenous compounds in resin manufacturing wastewater by anoxic denitrification and oxic nitrification process

1996 ◽  
Vol 34 (10) ◽  
pp. 35-41 ◽  
Author(s):  
Cheng Sheng-shung ◽  
Lin Yuh-Tarng ◽  
Chen Sheng-Kun
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Organic Nitrogen ◽  
Activated Sludge Process ◽  
Nitrogenous Compounds ◽  
Conventional Activated Sludge ◽  
Study Results ◽  
Nitrification Process ◽  
Enhanced Biodegradation ◽  
Conventional Activated Sludge Process

In this study, a stream of resin manufacturing wastewater with high contents of organic nitrogenous compounds was treated by a conventional activated sludge process with extended aeration and a modified anoxic denitrification unit followed with two oxic activated sludge units respectively. Performance comparison of these two processes showed that the enhanced biodegradation of organic nitrogen in the modified process was attained with 69.0% of organic nitrogen removal that related to 39.0% removal in the conventional process. The anoxic/oxic process also promoted the removal efficiencies of COD, TKN and TN (total nitrogen) from 91%, 49.6% and 7.4% to 95.3%, 83.8% and 74.4% respectively, in comparison with the conventional extended activated sludge process. These cheerful results also corresponded to the acceptable averaged effluent quality: 82 mg/l of CODs, 48 mg/l of Org.-N, 11 mg/l of NH4+-N, and 42 mg N/l of NO3−-N, that could meet the national effluent standard of ROC-EPA in 1998. The successful investigation also demonstrated that about 50% of the total organic nitrogen removal was achieved in the anoxic unit associated with denitrification, while the residual organic nitrogen was removed in the oxic unit. The pilot-study results suggested that the resin manufacturing wastewater containing high concentration of organic nitrogen should be treated by the anoxic denitrification and oxic nitrification process instead of the conventional activated sludge process with extended aeration.

Effect of Influent Nitrogen Speciation on Organic Nitrogen Occurrence in Activated Sludge Process Effluents

2011 ◽  
Vol 83 (8) ◽  
pp. 761-766 ◽  
Author(s):  
K. Pagilla ◽  
C. Sattayatewa ◽  
M. Urgun-Demirtas ◽  
S. Baek
Keyword(s):  
Activated Sludge ◽  
Organic Nitrogen ◽  
Activated Sludge Process

scholarly journals Sludge drying leads to organic nitrogen mineralization

2018 ◽  
Vol 44 ◽  
pp. 00071
Author(s):  
Łukasz Kokurewicz ◽  
Kamil Janiak ◽  
Bartosz Zięba
Keyword(s):  
High Temperature ◽  
Activated Sludge ◽  
Mass Balance ◽  
Nitrogen Mineralization ◽  
Organic Nitrogen ◽  
Full Scale ◽  
Soluble Nitrogen ◽  
Activated Sludge Process ◽  
Sludge Drying

Sludge drying leads to volatisation and removal of part of nitrogen contained in sludge. Removed nitrogen is usually condensed and recirculated to activated sludge process. It is assumed that mass of volatised nitrogen is equal to mass of soluble nitrogen in sludge. However results obtained from full-scale drying facility shows that mass of volatised nitrogen is 100% higher than mass of soluble nitrogen. It is suspected that nitrogen mineralization occurs due to high temperature maintained in dryers (> 220°C). These results are important as higher mass of nitrogen in condensate makes its removal economically reasonable. This paper shows results of nitrogen mass balance of full-scale drying facility.

DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Dinda Rita K. Hartaja ◽  
Imam Setiadi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Appropriate Technology ◽  
Waste Water Treatment Plant ◽  
Activated Sludge Process ◽  
High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

Process evaluation of HASP with IMET system through SNR and SDNR for the efficient management of Sewage Treatment Plant

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Young H. Yoon ◽  
Jae R. Park ◽  
Sang W. Ahn ◽  
Kwang B. Ko ◽  
Kyung J. Min ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Linear Regression Analysis ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Reaction Rates ◽  
Nitrification Rate ◽  
Activated Sludge Process ◽  
Type Experiment ◽  
Batch Type ◽  
Nitrification And Denitrification

Hybrid Activated Sludge Process (HASP) with IMET was developed and applied to an activated sludge process for the advanced nutrient treatment in Korea. The characteristics of nitrogen removal from the HASP were investigated through a kinetic study by batch-type experiment. Online DB analysis produced from the IMET was conducted for the nutrient removal performance in the field demonstration plant treating 10,000 m3/day in G city of Korea. In this paper, we aimed to determine the effect of increasing NHM4+-N load on the specific nitrification rate (SNR) and the specific denitrification rate (SDNR) through a batch-type experiment, and to estimate the net reaction time for the phase-transfer rate using online DB analysis in the HASP operation. Experimental results include: (1) both the nitrification and denitrification followed first-order kinetics; (2) the maximum SNR and SDNR were 4.0301 mgN/gVSS·hr and 2.785 mgN/gVSS·hr, respectively; (3) comparison of reaction rates between nitrification and denitrification from the non-linear regression analysis found that nitrification rate was higher than denitrification.

Deemulsification of Water-in-Oil Emulsion with Sludges

1987 ◽  
Vol 22 (3) ◽  
pp. 437-443 ◽  
Author(s):  
N. Kosaric ◽  
Z. Duvnjak
Keyword(s):  
Activated Sludge ◽  
Room Temperature ◽  
Petroleum Refinery ◽  
Treatment Plant ◽  
Granular Sludge ◽  
Activated Sludge Process ◽  
Sludge Treatment ◽  
Oil Emulsion ◽  
Water In Oil Emulsion ◽  
Aerobic Sludge

Abstract Aerobic sludge from a municipal activated sludge treatment plant, sludge from a conventional municipal anaerobic digester, aerobic sludge from an activated sludge process of a petroleum refinery, and granular sludge from an upflow sludge blanket reactor (USBR) were tested in the deemulsification of a water-in-oil emulsion. All sludges except the last one, showed a good deemulsification capability and could he used for a partial deemulsification of such emulsions. The rate and degree of the deemulsifications increased with an increase in sludge concentrations. The deemulsifications were faster at 85°C and required smaller amounts of sludge than in the case of the deemulsifications at room temperature. An extended stirring (up to a certain limit) in the course of the dispersion of sludge emulsion helped the deemulsification. Too vigorous agitation had an adverse effect. The deemulsification effect of sludge became less visible with an increase in the dilution of emulsion which caused an increase in its spontaneous deemulsification.

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