The anaerobic reactor needs to be tested for producing water gas before it is put into operation. There is leakage in water filling test. The qi-density test requires pressure to 350mm water column in the pool. And before anaerobic sludge cultivation and acclimation, nitrogen should be brushed, so wet anaerobic: What are the precautions when the anaerobic reactor is started?

Wet Anaerobic: What are the precautions when starting an anaerobic reactor?

The anaerobic reactor needs to be tested for producing water gas before it is put into operation. There is leakage in water filling test. The qi-density test requires pressure to 350mm water column in the pool. And before anaerobic sludge cultivation and acclimation, nitrogen should be brushed, so wet anaerobic: What are the precautions when the anaerobic reactor is started?

Wet Anaerobic: What are the precautions when starting an anaerobic reactor?

1. Anaerobic activated sludge shall be obtained by operating an anaerobic treatment structure similar to sewage. They can also be extracted from the bottoms of rivers and lakes, urban sewers and sewage. The excess sludge of the oxygen activated sludge process can be used for rotation training, but it takes a long time.

2. The wet anaerobic reactor is slow because of the slow proliferation of microorganisms. The general launch time is relatively long. If a large amount of anaerobic sludge can be inoculated, the start-up time can be shortened. In general, the amount of inoculated sludge needs to reach 10% ~ 9% of the reactor volume, and the guaranteed value depends on the source of inoculated sludge. The larger the inoculum, the shorter the start time. If the inoculation sludge contains a lot of methane bacteria, the effect will be better.

3. When using medium temperature or high temperature, the slower the heating, the better, not more than 1c/h. At the same time, when the wastewater contains more carbohydrates and lacks alkaline buffer substances, it is necessary to supplement part of the alkali source and strictly control it. The pH in the reactor is between 6.8 and 7.8.

4. Initial organic load The initial organic load is related to anaerobic treatment methods, wastewater properties, temperature and other process conditions, and the properties of inoculated sludge. Generally, the load is gradually increased from the lower load, and the load is gradually increased to complete the launch process. If UAAB is started, the initial organic load is generally 0.1~0.2 kgcodcr/(kgmlss d). When the CODCR removal rate reached 80% or the concentration of volatile organic acid VFA was less than 1000mg/l, the load increased by 50%. If the concentration of VFA in the water is high, it is not appropriate to increase the load, or even reduce the load as appropriate.

5. The output of the anaerobic reactor can be returned to the reactor with a certain return, and the pH value of the sludge and buffer substances in the water can be recovered from the water. The general attachment reaction device has a certain interception effect because the filler has a certain interception effect, so it may not need to return water; the suspension growth reaction device is easy to lose due to sludge, and the water can be properly returned.

6. For the floating anaerobic reaction in this county, you can add pink, coal, and signature volume of water gravel, powdered activated carbon or flocculant to promote the granulation of sludge.

7. Too large hydraulic signal may lead to a large amount of sludge loss, and too low hydraulic load is not conducive to the screening of anaerobic sludge. Generally, a lower hydraulic load is selected at the beginning of the launch, and it will gradually increase and become larger after a few weeks.