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Sang-Ill, et al (1997) with fermented wastewater instead of acetate as a carbon source to increase the expansion of the degradation efficiency of nutrients in SBR. Between the two is no big difference between total N and P removal rates can reach 90% and 89%.
analysis:

test device:
SBR different steps in the use of biological nutrient removal




     

for testing simulated wastewater containing: glucose, sodium acetate, NH 4 Cl, KH 2 PO 4 , MgSO 4 · 7H 2 O, NaHCO 3 trace elements solution containing NaCl (100 mgL - 1 ), KCl (20 mgL), CaCl 2 · 2H 2 O (50 mg L - 1 ), FeCl 3 · 6H 2 O (50 mg L - 1 ). Synthetic wastewater composition in Table 1. Main components of synthetic wastewater CODo = 1000 mg L - 1 , NT = 50 mg L - 1 and PT = 15 mg L - 1 , COD / N / P = 100/5/1.5. MgSO 4 and NaHCO 3 concentration when added to 0.1 g L - 1 and 0.59 g L - 1 , the initial pH value transferred to 7.0.
microorganisms:
above have not been studied in the SBR in the role of the number of different steps. Therefore, the main purpose of this study is that the SBR in the number of different steps to remove the effects of comparison. Operation, including a different number of <LABEL class=lb onclick=way.
Introduction:
wastewater components:
Colunga and Martinez (1996) studied the biofilm SBR in <LABEL class=lb onclick=impact. Total cycle time of 8 and 12 hours, which <LABEL class=lb onclick=When the cycle time of 12 hours, <LABEL class=lb onclick=
Umble and Ketchum (1997) the use of SBR to treat municipal wastewater. The total operating time of 12h, BOD 5 , TSS, and NH 3 -N removal rate of 98%, 90% and 89%.
test operation:
Keywords: SBR biological nutrient removal of different steps
Materials and methods:
at each processing stage (aerobic, <LABEL class=lb onclick=Samples were centrifuged at 6000 rpm 30min, thereby removing the liquid medium in the micro-organisms. Supernatant was used for analysis of COD, NH 4 / NO 3 N. N and P using standard methods (Merck-Spectroquant) and spectroscopy. COD,, TS and TSS using standard methods (APHA 1998). DO and pH control of fermentation by micro-computer (New Brunswick, Bioflo IIC) together with the micro-electrode measurement. Samples filtered through 0.45μm membrane micro-filtered air at 105 ℃ for weighing to determine the biomass concentration (MLSS).
Zuniga and Martinez (1996) studied biofilm SBR process in place in four style: an / ax / ao / ax at the same time place P and N. In addition to the successful operation COD, P and N removal rates were 89 ± 1%, 75 ± 15%, and 87 ± 10%.
SBR long for the removal of wastewater COD and P (Baozhen other 1998; Belia and Smith 1997; Carucci, etc. 1997; Colunga and Martinez 1996; Danesh and Oleskiewicz 1997; Ramirez and Martinez 2000; Tasli et al 1997.) nutrition improved wastewater using SBR to explain the recent nutrients, nitrification and denitrification in place while the COD and P. SBR batch process steps include: add, reaction, sedimentation, Bi water and idle (Metcalf and Eddy 1991). You can adjust <LABEL class=lb onclick=

previously existing literature on the number of operations have been studied (Andreottola other 1997; Chang and Hao 1996; Demoulin, etc. 1997; Keller and other 1997; Pastorelli, etc. 1999; Sang-Ill, etc. 1997; Umble and Ketchum1997; Zuniga and Martinez 1996). Minimum concentration of water, Andreottola et al (1997) has a cycle length of the best methods of calculation. Water N,abercrombie pas cher, NO 2 -N and NH 4 -N concentration of 2.9 mg l - 1 , 0.04 mg l - 1 and 0.06 mg l - 1 , in which oxygen between the hours of operation for the 3.3h <LABEL class = lb onclick =
three-step operation as an (1 h),mbt chaussures paris, ax (1.5 h), ox (4 h) and 0.5 h of idle time, total operation time of 7 h. Four drill as an (1 .5 h), ox (4 h), ax (1.5 h), ox (2 h) and 0.5 h of idle time, total operation time of 10.5h. Five-step operation for the An / Ax / Ox / An / Ox its water residence time were as 1/1.5/4/1.5/2 h and 0.5 h of idle time,abercrombie fitch paris, total operating time of 9 h. Sludge retention time remained at 10 days. Run twice for each experimental condition. In order to adapt to the environment to run for the first time, the second in order to get experimental data.
Figure 1 is a diagram of test equipment. 5L fermentation tank (Bioflo IIC, New Brunswick) as the SBR reactor. Fermentation by micro-computer controlled ventilation, pH and dissolved oxygen (DO). By aeration with . Stirring rate at 25 and 300 rpm (rev min - 1 ). Nutrient solution pH and DO concentration in the corresponding electrodes through continuous monitoring.

intermittent operation at the beginning before the reactor by adding the simulated wastewater containing the mixture of microorganisms, after several days of intermittent ventilation, to test the concentration of micro-organisms need to get started. Microbial precipitation, the supernatant was added to remove the total volume of 4L 5L of culture medium. Then, start intermittent <LABEL class=lb onclick=Only <LABEL class=lb onclick=In <LABEL class=lb onclick=Operation in the aerobic medium for full ventilation and stirring (300 rpm). In the beginning and end of each operation sampling and analysis. After the end of each SBR, microorganisms after 30 minutes of precipitation, discharge supernatant. Precipitation of micro-organisms for the next operation. In order to maintain the sludge sludge age 10 days, 1 / 10 of the discharge of sediment microorganisms. Temperature and pH maintained at T = 25 ℃ and pH = 7-7.5. DO concentration in the aerobic phase maintained at 2 mg L - 1 , and operation between the oxygen at 0.
mixed microorganisms, including: the ability of heterotrophic microbial carbon dioxide,franklin marshall pas cher, denitrifying bacteria, autotrophic nitrifying bacteria, bacteria (acid) to absorb excess P microorganisms ( Acinetobacter sp ). Digestion of bacteria ( Nitrosomonas and Nitrobacter ) is obtained from the United States Clemson University. Strange bacteria from C ¸ igli urban sewage treatment plant. Water treatment plant in Izmir inoculation to remove C and N micro-organisms. For the absorption of more than P, Acinetobacter calcoaceticus (NRRL-552) strains from the United States USDA, National Research Laboratory. Really a microbial flora grow in the laboratory using the appropriate culture medium, inoculated with mixed microbial environment.
Chang and Hao (1996) published a very important influence in SBR operating parameters, to monitor and control operations online. Generally, when the sludge residence time of 10 days, the total cycle time of 6h, the system of COD, total N and P removal rate of 91, 98 and 98%
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