scholarly journals PROFIL PERUBAHAN AMONIUM, NITRIT DAN NITRAT PADA PERCOBAAN CURAH DARI PDAM BOGOR DAN SURABAYA

2016 ◽  
Vol 11 (3) ◽  
pp. 443
Author(s):  
Hartati Imamuddin
Keyword(s):  
Batch Reactor ◽  
Aerobic Condition ◽  
Batch Experiment ◽  
Nitrifying Bacteria ◽  
Nitrate Production ◽  
Slow Growing

Nitrification is often not effective because the characters of nitrifying bacteria is always slow growing and temperature, pH, DO, amonia concentration, nitrite and C/N ratio as the limited factors. Batch experiment was operated for 6 hours, every half an hours ammonium, nitrite and nitrate were measured.The results showed that added C sourse (glucose) in medium from PDAM Bogorand Surabaya have a significant effects of ammonium degradation, nitrite and nitrate production. Degradation of ammonium in batch reactor from PDAM Bogor showed that both  naerobic and aerobic condition have a different fluctuation. Production of nitrite was stable from the middle of reaction to last of aerobic phase. In aerobic condition nitrate production is reduced to 49,21 % (+ glucose) and 60,87% (+ acetate) Batch reactor from PDAM Surabaya differ from PDAM Bogor particularly on degradation of ammonium. Added glucose as C source cause the concentration of ammonium was increased and acetate as C source showed stable with a slightly fluctuation. Nitrite and nitrate production relatively small in both C source.

The SBR and its biofilm application potentials

2004 ◽  
Vol 50 (10) ◽  
pp. 1-10 ◽  
Author(s):  
P.A. Wilderer ◽  
B.S. McSwain
Keyword(s):  
Activated Sludge ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Waste Streams ◽  
Sludge Flocs ◽  
Biofilm Reactors ◽  
Volatile Organic ◽  
High Level ◽  
Slow Growing

Twenty plus years of experience, innovation, and research in the field of biological wastewater treatment and biofilm applications lead to the conclusion that biofilms are in many cases more desirable in reactors than suspended activated sludge. Biofilm reactors can provide very long biomass residence times even when the hydraulic influent loading is low. This makes them particularly suitable when treatment requires slow growing organisms with poor biomass yield or when the wastewater concentration is too low to support growth of activated sludge flocs. Regardless of the settling characteristics of biological aggregates or the hydraulic influent loading the metabolic activity in the reactor can be maintained at a high level. This paper reviews the application of biofilms in sequencing batch reactor (SBR) systems to treat non-readily biodegradable substrates, volatile organic waste constituents, complex waste streams requiring co-metabolism, and particulate wastewaters. Recent research using the SBR to form aerobic granular sludge as a special application of biofilms is also discussed.

Performance and membrane fouling in a pilot scale SBR process coupled with membrane

2003 ◽  
Vol 47 (1) ◽  
pp. 139-144 ◽  
Author(s):  
H. Shin ◽  
S. Kang
Keyword(s):  
Membrane Fouling ◽  
Batch Reactor ◽  
Pilot Scale ◽  
Nitrifying Bacteria ◽  
Endogenous Respiration ◽  
Aeration Time ◽  
Membrane Flux ◽  
Start Up ◽  
Cell Test ◽  
Stirred Cell

The performance of the pilot-scale submerged membrane coupled with sequencing batch reactor (SM-SBR) for upgrading effluent quality was investigated in this study. The reactor was operated with 3-hour cycle with alternating anoxic and aerobic conditions to treat organics, nitrogen and phosphate. Despite various influent characteristics, COD removal was always higher than 95%. Sufficient nitrification was obtained within a few weeks after start-up and during the stable period, complete nitrification occurred despite short aeration time. Total nitrogen (TN) removal efficiency was reached up to 85%. Membrane flux was critical for TN removal so that the decrease of flux by membrane fouling led to increase of HRT, and it caused the endogenous respiration of microorganisms such as nitrifying bacteria. The stirred cell test revealed the significant role of the soluble fraction in membrane permeability and dissolved solids played a major role in the short-term fouling mechanism. The cake resistance by the soluble COD fraction of supernatant or soluble microbial products (SMP) was investigated as a major part of total resistance.

Sequencing batch reactor (SBR) as optimal method for production of granular activated sludge (GAS) – fluid dynamic investigations

2007 ◽  
Vol 55 (8-9) ◽  
pp. 151-158 ◽  
Author(s):  
B.E. Zima ◽  
L. Díez ◽  
W. Kowalczyk ◽  
A. Delgado
Keyword(s):  
Multiphase Flow ◽  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Fluid Dynamic ◽  
Batch Reactor ◽  
Aerobic Condition ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Major Influence ◽  
Optimal Method

Fluid dynamic investigations of multiphase flow (fluid, air, granules) in a sequencing batch reactor (SBR) are presented. SBR can be considered as an attractive technology for cultivation of granular activated sludge (GAS). Granulation is a complicated process and its mechanism is not fully understood yet. Many factors influence the formation and structure of aerobic granular sludge in a bioreactor. Extracellular polymer substances (EPS) and superficial gas velocity (SGV) play a crucial role for granules formation. Additionally, it is supposed that EPS production is stimulated by mechanical forces. It is also assumed that hydrodynamic effects have a major influence on the formation, shape and size of GAS in SBR under aerobic condition. However, the influence of stress on granulation is poorly investigated. Thus, in the present paper, fluid dynamic investigations of multiphase flow in a SBR, particularly effect of normal and shear strain, are reported. In order to analyse multiphase flow in the SBR, optical in-situ techniques with particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are implemented. Obtained results show a characteristic flow pattern in a SBR. It is pointed out that additional effects like particle-wall collisions, inter particle collisions, erosion can also affect significantly granules formation.

Anaerobic uptake of phosphate in an anaerobic–aerobic granular sludge sequencing batch reactor

2006 ◽  
Vol 53 (9) ◽  
pp. 63-70 ◽  
Author(s):  
X. Wang ◽  
M. Ji ◽  
J.F. Wang ◽  
Z. Liu ◽  
Z.Y. Yang
Keyword(s):  
Sequencing Batch Reactor ◽  
Phosphate Uptake ◽  
Batch Reactor ◽  
Aerobic Condition ◽  
Granular Sludge ◽  
Organic Substrate ◽  
Phosphate Removal ◽  
Aerobic Granular Sludge ◽  
Unusual Phenomenon ◽  
Phosphate Carrier

An unusual phenomenon of anaerobic phosphate uptake under alternating anaerobic/aerobic condition was observed in a granular sludge sequencing batch reactor, fed with acetate as sole organic substrate. Anaerobic phosphate uptake efficiencies remained at 50–70% as the influent P/COD was increased from 2/100 to 4/100, and results showed that anaerobic uptake of phosphate was correlated with anaerobic absorption of acetate. Excluding the main possibility of chemical phosphate removal, it appeared that phosphate uptake during the anaerobic phase was associated with organisms enriched in the reactor. Moreover, results indicated that intracellular glycogen was used as the main energy source of organics anaerobic absorption and intracellular polymers storage. Measuring and analysing the variation of phosphate, organic substrate, intracellular glycogen and pH in the anaerobic phase, a preliminary explanation was developed that anaerobic uptake of phosphate was the demand of intracellular glycogen degradation, and extracellular phosphate was transported to intracellular by pH gradient-sensitive phosphate carrier protein.

scholarly journals Investigation of suitable conditions for the growth and producing biofilm of denitrifying bacteria

2016 ◽  
Vol 14 (1) ◽  
pp. 191-196
Author(s):  
Hoàng Phương Hà ◽  
Nguyễn Quang Huy ◽  
Hoàng Thị Yến
Keyword(s):  
Aerobic Condition ◽  
Denitrifying Bacteria ◽  
Nitrifying Bacteria ◽  
Contaminated Water ◽  
Rrna Gene ◽  
Anaerobic Conditions ◽  
16S Rrna Gene Analysis ◽  
Lower Efficiency ◽  
Terminal Electron Acceptor ◽  
Selection Of

Denitrification occurs under anaerobic conditions, utilizing organic substances such as a carbon source and nitrate as the terminal electron acceptor. Some bacteria strains that are capable of producing biofilm and are attached to the carrier for the applications of the nitrate contaminated water treatment. This process is done simultaneously with the process of nitrification, nitrifying bacteria on the biofilm surface (ocic zone), denitrifying bacteria under biofilm (anoxic zone). The selection of suitable conditions for the growth and production of biofilm of denitrifying bacteria is the target of this research. Two strains D10 and D32 are capable to reduce nitrate and created the best biofilm. Optimal conditions for the strain growth were: 37oC, pH 6.6 - 7. Supplementation of 0.006% M1, E2 (methanol, ethanol) increased the reducing N-NO3 to 80% and 100% respectively. Denitrification process still occured in aerobic condition but with lower efficiency (25.8%) byD32 strain. Based on 16S rRNA gene analysis, D10 strain was the closest relative with Bacillus fusiformis, D32 closest to Pseudomonas denitrifricans.

scholarly journals PERAN KOMUNITAS MIKROBA LUMPUR AKTIF DALAM PEROMBAKAN DETERGEN ALKIL SULFONAT LINEAR DAN BENZENA ALKIL SULFONAT

2004 ◽  
Vol 10 (1) ◽  
pp. 75-80
Author(s):  
I Made Sudiana
Keyword(s):  
Microbial Community ◽  
Activated Sludge ◽  
Batch Reactor ◽  
Aerobic Condition ◽  
Appropriate Technology ◽  
Activated Sludge Process ◽  
Biodegradation Rate ◽  
Complex Microbial Community ◽  
Alkyl Sulfonate ◽  
Set Up

The study was conducted to evaluate the biodegradation of detergent contained Alkyl Sulfonate (LAS) and Benzene Alkyl Sulfonate (BAS) occur under aerobic condition by complex microbial community in activated sludge process. A 1.8 L of sequential batch reactor, and batch experiments were set up to study the characters LAS and BAS biodegradation. Microbial community in Activated Sludge actively brook down LAS and BAS. Biodegradation rate of LAS was higher than that of BAS. The complex chemical molecule structure of ABS could be the reason for slower degradation of BAS. The value of LAS degradation under aerobic condition were indicated by μmax of 0.26–h, Ks = 15.5 mg/L, Vmax = 11.04 mg/L. hour–1and Km = 8.19 mg/L. Whereas for BAS were μmax of 0.22–h, Ks = 25.1 mg/L, Vmax = 12.74 mg/L. hour–1and Km = 8.119 mg/L. Activated sludge process is appropriate technology for removal of removal of LAS and BAS.

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