CN1247470C - SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof - Google Patents
SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof Download PDFInfo
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- CN1247470C CN1247470C CN 200410029800 CN200410029800A CN1247470C CN 1247470 C CN1247470 C CN 1247470C CN 200410029800 CN200410029800 CN 200410029800 CN 200410029800 A CN200410029800 A CN 200410029800A CN 1247470 C CN1247470 C CN 1247470C
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- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 10
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Abstract
Description
X DO | +1 | +2 | +3 | +4 | +5 | +6 |
E DO(mg/L) | 2.5~2.7 | 2.7~3.0 | 3.0~3.5 | 3.5~4.0 | 4.0~5.0 | 5.0~ +∞ |
CX DO | +1 | +2 | +3 | +4 | +5 | +6 |
CE DO(mg/L/min) | -0.002 ~ 0.001 | 0.001~ 0.02 | 0.02~ 0.035 | 0.035~ 0.05 | 0.05~ 0.06 | 0.06~ +∞ |
| X | DO | |||||||||||
1 | 2 | 3 | 4 | 5 | 6 | ||||||||
PS PM PB | Degree of membership- | 1 0.1 0 | 0.6 0.4 0 | 0.2 0.7 0.1 | 0 1 0.4 | 0 0.6 0.7 | 0 0.2 1 |
CX pH | -2 | -1 | 0 | +1 | +2 |
CE pH (min 1) | -∞ ~ -0.002 | -0.002 ~ -0.001 | -0.001 ~ 0.001 | 0.001 ~ 0.002 | 0.002 ~ +∞ |
Fuzzy set | CX pH | ||||
-2 | -1 | 0 | 1 | 2 | |
The |
1 0 0 | 1 0 0 | 0 1 0 | 0 0 1 | 0 0 1 |
Output variable | CX pH | ||
N | | P | |
UA | |||
0 | 0 | 1 |
X ORP | -6 | -5 | -4 | -3 | -2 | -1 | -0 |
E ORP (mV) | -∞~ -300 | -300~-15 0 | -150~-75 | -75~-38 | -38~-18 | -18~-10 | -10~+∞ |
CX ORP | -6 | -5 | -4 | -3 | -2 | -1 | -0 |
CE ORP (mV/min) | -∞~-30 | -30~-25 | -25~-20 | -20~-15 | -15~-10 | -10~-5 | -5~0 |
CX pH | -4 | -3 | -2 | -1 | -0 |
CE pH (1/min) | -∞~0.06 | -0.06~-0.04 | -0.04~-0.02 | -0.02~-0.01 | -0.01~0 |
CX pH | +0 | +1 | +2 | +3 | +4 |
CE pH (1/min) | 0~0.01 | 0.01~0.02 | 0.02~0.04 | 0.04~0.06 | 0.06~+∞ |
C2X pH | -2 | -1 | 0 | 1 | 2 |
C2E pH (min -2) | -∞~-0.013 | -0.013~-0.00 5 | -0.005~0.005 | 0.005~0.013 | 0.013~+∞ |
Fuzzy set | X ORPAnd CX ORP | |||||||
-6 | -5 | -4 | -3 | -2 | -1 | -0 | ||
NO NS NM NB | Degree of |
0 0 0.2 1 | 0 0 0.6 0.7 | 0 0.1 1 0.4 | 0 0.55 0.7 0.1 | 0.1 1 0.4 0 | 0.55 0.8 0.1 0 | 1 0.6 0 0 |
Fuzzy set | CX pH | ||||||||||
-4 | -3 | -2 | -1 | -0 | +0 | +1 | +2 | +3 | +4 | ||
PB PS PO NO NS NB | Degree of |
0 0 0 0 0.1 1 | 0 0 0 0 0.55 0.7 | 0 0 0 0.1 1 0.4 | 0 0 0 0.55 0.8 0 | 0 0 0 1 0.6 0 | 0 0.6 1 0 0 0 | 0 0.8 0.55 0 0 0 | 0.4 1 0.1 0 0 0 | 0.7 0.55 0 0 0 0 | 1 0.1 0 0 0 0 |
Fuzzy set | C2X pH | |||||
-2 | -1 | 0 | 1 | 2 | ||
P O N | Degree of |
0 0 1 | 0 0 1 | 0 1 0 | 1 0 0 | 1 0 0 |
E ORP | ||||||||||||
NB | NM | NS | ||||||||||
CEpH | CE ORP | CE ORP | CE ORP | |||||||||
NB | NM | NS | NO | NB | NM | NS | NO | NB | NM | NS | NO | |
UM | ||||||||||||
NB NS NO PO PS PB | 0① 1② 1 0 0 0 | 0 1 1 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 | 0 1 1 0 0 0 | 0 1 1 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 | 0 0 0 0 0 0 |
CE pH | C2E pH | ||
N | O | P | |
Up | |||
NB NS NO PO PS PB | 0① 0 0 0 0 0 | 0 1② 1 1 0 0 | 0 0 0 0 0 0 |
Claims (5)
- A SBR method alternately aerobic/the anoxic biological denitrification process, it is characterized in that: aerobic in the sbr reactor device-anoxic, aerobic-the anoxic alternate run, adopt three sections water intake modes to remove organism and nitrogenous compound in the waste water, operation is as follows:A, water inlet operation: the inlet valve that will connect water inlet pipe is opened, and first section waste water directly enters the sbr reactor device, closes inlet valve after reaching predetermined amount;B, aerobic aeration operation I are input into aerator with pressurized air, and oxygen supply in active sludge intermixture is degraded and carried out the nitrification of nitrogenous compound organism;C, anoxia stirring operation I, open inlet valve, second section waste water enters as electron donor when sbr reactor device anoxia stirring, make the nitrite that produces in the aerobic aeration stage be converted into nitrogen through the denitrifying bacterium effect, satisfy the requirement of the required carbon source of short-cut denitrification to the waste water that is added and promptly close inlet valve, open stirrer simultaneously, total system enters the denitrification denitrogenation stage, after denitrification finishes for the first time, disconnect stirrer;D, aerobic aeration operation II: the same b of process;E, anoxia stirring operation II: the same c of process, the 3rd section waste water is still as denitrifying electron donor, be after denitrification is finished, enter aerobic nitrification stage and when end again, denitrifying carbon source during as following closely anoxia stirring adds, and makes the nitrite that generates in the reactor in time be converted into nitrogen through anoxic denitrification;F, precipitation operation: inlet valve, air intake valve, water discharging valve and spoil disposal valve are all closed at this moment;G, drainage procedure: will handle back water outside rising pipe is discharged to reactor;H, idle operation: all valves and volume pump are all closed, and the reaction tank also not draining of not intaking is in holding state.
- 2. real-time control method according to the alternately aerobic/anoxic SBR biological denitrification process of claim 1 is characterized in that:In Sewage treatment systems,, gather redox potential ORP, the signal of dissolved oxygen concentration DO and pH value by dissolved oxygen concentration DO transmitter, redox potential ORP transmitter and the on-line monitoring of pH transmitter; ORP, DO and the pH value signal gathered are imported analog digital conversion element A/D through transmitter, convert numerary signal to; Numerary signal is imported computer, through calculating, the obfuscation of manipulated variable deviation calculate, with the fuzzy control rule comparison of input in advance, adopt the fuzzy predication method of Mamdani carry out the fuzzy control reasoning, after non-Defuzzication calculates, obtain the fuzzy control variable; Convert the fuzzy control variable to control signal through digital-to-analogue conversion element D/A again; Control signal control topworks, the flooding quantity of eight steps of fuzzy control reaction tank, aeration time, churning time, aeration time, churning time, precipitation, draining and the idle timed interval for the second time for the first time in real time.
- 3, according to claim 2 alternately aerobic/real-time control method of anoxic SBR biological denitrification process, it is characterized in that: above-mentioned first time, the fuzzy control of aeration time was that first order derivative as ORP is during less than 0.4~0.8mV/min, stop aeration, enter anoxic denitrification for the first time.
- 4, according to claim 2 alternately aerobic/real-time control method of anoxic SBR biological denitrification process, it is characterized in that: above-mentioned second time, the fuzzy control of aeration time was when basicity is sufficient, the first order derivative of pH is just changed into by negative, and during aeration time t>2h, infer nitrated termination, stop aeration;When basicity was not enough, DO was greater than 5mg/L, and during and aeration time t>2h, the first order derivative absolute value of pH is less than 0.002min simultaneously -1The time, infer nitrated termination, stop aeration.
- 5, according to claim 2 alternately aerobic/real-time control method of anoxic SBR biological denitrification process, it is characterized in that: the fuzzy control of above-mentioned churning time be when the first order derivative of pH by the first order derivative that just changes negative or ORP into by-25~-when 20mV/min becomes less than-30mV/min suddenly, and during churning time t>0.5h, infer that denitrification finishes, stop to stir.
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