DY-282 Aeration Tank Mixed Liquid Oxygen Consumption Rate Determination Training Platform
Release time：2024-06-24 16:00viewed：times
1. Experimental purpose:
The determination of the oxygen consumption rate of the mixed liquor is an important premise for deriving the relationship between the degradation of the substrate and the oxygen demand in the completely mixed aeration tank, and for finding the ratio a' of the part of the substrate degradation used to generate energy and the endogenous respiration oxygen consumption rate b'. It can also be used to judge the biodegradability of sewage. Therefore, this determination method is also one of the basic methods that must be mastered by technical personnel engaged in scientific research, design and operation management.
1. Deepen the understanding of the concepts of oxygen consumption rate and oxygen consumption of activated sludge, as well as their relationship with each other;
2. Master the method of determining the oxygen consumption efficiency of sludge;
3. Determine the oxygen consumption rate of the mixed liquor in the aeration tank of a treatment plant.
2. Experimental principle:
In the aerobic biological treatment of sewage, microorganisms continuously consume oxygen in the process of degrading organic matter. When the F/M, temperature, mixing and other conditions rem*n unchanged, their oxygen consumption rate rem*ns unchanged. According to this property, take the mixed liquid of the aeration tank into a closed cont*ner, and measure the relationship between the dissolved oxygen of the mixed liquid and time under stirring. The slope of the str*ght line is the oxygen consumption rate.
Second, the m*n technical indicators and parameters:
1. Ambient temperature: 5℃～40℃
2. Treated water volume: 5L/h
3. Residence time: 3, 4～8h
4. Designed inlet and outlet water quality range:
Inlet BOD5 400～800mg/L Outlet 50～100 mg/L
Inlet COD 600～1200mg/L Outlet 100～150 mg/L
Inlet SS 200～400mg/L Outlet 30～40 mg/L
Inlet pH 6～9 Outlet 6～9
5. Aeration reaction tank: 500mm×350mm×500mm,
6. Device dimensions: 900mm×400mm×1300mm,
7. Working power supply: AC220V±10%, 50Hz, single-phase three-wire system, power 500W, safety protection: with grounding protection, leakage protection, overcurrent protection,
III. M*n configuration:
1. 1 raw water tank: white PP board material, thickness 10mm, 400×400×400mm, a dr*n valve is installed on the bottom plate to dr*n the water conveniently;
2. 1 clean water tank: white PP board material, thickness 10mm, 200×400×400mm, a dr*n valve is installed on the bottom plate to dr*n the water conveniently;
3. Equipped with 1 raw water tank stirring motor and 1 set of 304 st*nless steel stirring paddle; (power 25W, speed 120rpm), (including 1 speed regulator)
4. 1 set of aerated mixed liquid reaction tank, including 1 set of aeration pipes, transparent plexiglass material, wall thickness 10mm, 450×350×500mm,
5. 1 anti-corrosion lifting magnetic water pump, flow rate: 16~19 (L/min), head: 2.7~3.4 (m), power 20W;
6. 1 stirring motor, 1 set of 304 st*nless steel stirring paddle; (power 25W, speed 120rpm), (including 1 speed regulator)
7. 1 *r pump, power: 40 W, maximum *r volume: 16L/min, with 1 set of microporous aeration tubes,
8. Flow measurement and regulation: 1 water inlet liquid flow meter: range 2-20L/H,
9. Flow measurement and regulation: 1 gas flow meter: range 250~2500L/h;
10. 1 digital dissolved oxygen meter, model: ZFDOC-101C, technical parameters: (1) Measuring range: dissolved oxygen: 0~25.00mg/L; temperature: 0~60℃; (2) Measurement error: dissolved oxygen: ± 0.2mg/LF•S; Temperature: ±0.5℃ (3) Automatic temperature compensation: 0～60℃; (4) Electrode residual signal: <1‰; (5) Response time (90% of final value): <60S at 25℃; <30S at 35℃; (6) Stability: Drift per week <2%F•S at normal pressure and constant temperature; (7) Signal output: 0～10mA (load resistance <1.5KΩ); 4～20mA (load resistance <750Ω); 0～5VDC or 0～10VDC (reservation required); (8) Two sets of relay control contacts: 3A 240VAC, 6A 28VDC or 120VAC; (9) Power supply: 220VAC±10%, 50±1Hz, power ≤3W; 24VDC, power ≤1W (reservation required); 12VDC, power ≤1W (reservation required); (10) Dimensions: 96×96×130mm;
11. Power control system: 1 double-sided matte dense-gr*ned spray-coated electric control box, leakage protector (Delixi brand), voltmeter, lockable push button switch, wire pipe, etc.
12. Matching UPVC connecting pipes and valves (Zhongc* brand).
13. St*nless steel frame test bench (30mm×30mm st*nless steel square tube, with universal casters with locking feet), etc.
14. Virtual simulation software for electrical installation of building and intelligent building Based on unity3d design, users can choose different sizes of interactive interface according to computer configuration, and can choose six levels of image quality. The model in the software can be rotated 360°, enlarged, reduced, and translated. There are assistant prompts during the use of the software, the contents are as follows: A. Wet alarm system 1. System overview: Overview of wet alarm system 2. Equipment recognition: It has the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (built-in 6 multiple-choice questions, with prompts for correct and incorrect choices), schematic diagram (you can enter the equipment from the schematic diagram). The equipment includes: sprinkler, water flow indicator, signal butterfly valve, exhaust valve, fire alarm control, high pressure gauge, high-level water tank, Weiya control cabinet, pressure regulating tank, flow switch, terminal water test device, dr*nage facilities, water pump connector, hydraulic alarm, delay, wet alarm, butterfly valve, check valve, fire pump, safety pressure regulating valve, fire water tank.
3. Principle display: Display the working principle of the wet alarm system, 3D animation demonstration, 3D model is semi-transparent, and the internal water flow can be seen. Equipped with exercise module (4 multiple-choice questions are built-in, and there are prompts for correct and wrong choices)
4. Design layout: There are multiple-choice questions and calculation questions, each of which is scored, and the correct answer and score are displayed after submission
B. Gas fire extinguishing system
1. System overview: Overview of gas fire extinguishing system
2. Equipment recognition: There are optimal viewing angles, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (8 built-in multiple-choice questions, and there are prompts for correct and wrong choices), and schematic diagrams (you can enter the equipment from the schematic diagram). The equipment includes: nozzles, HFC-227 storage bottles, bottle head valves, heptafluoropropane check valves, high-pressure hoses, gas check valves, safety valves, weighing alarms, electromagnetic starters, selection valves, smoke alarms, and fire alarm controllers.
3. Principle display: Display the working principle of the gas fire extinguishing system, 3D animation demonstrations, and 3D models are semi-transparent, and the internal gas can be seen. Equipped with practice module (built-in 3 multiple-choice questions, with prompts for correct and wrong choices)
4. Design and layout: There are 6 multiple-choice questions, each with scores, and the correct answer and score will be displayed after submission
. C. Escape drill: Teaching in the form of fun games, escape from the burning room within a limited time, and wrong choices will directly enter the score interface.
Wechat scan code follow us
