Acidification in the anaerobic tank; it is suspected that the microorganisms are essentially dead
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The anaerobic tank has acidified, and it is suspected that the microorganisms have basically died. Now I want to restart cultivation; I know the values for COD, ammonia nitrogen, and total phosphorus. If I want to add nutrients now, should I use a ratio of 100:5:1? Can the pH in the anaerobic tank be adjusted to 7 by adding a large amount of caustic soda? What type of fertilizer is better to use for adding nutrients, and how often should it be applied per day?
Knowing the levels of COD, ammonia nitrogen, and total phosphorus, nutrients should be added at a ratio of 100:5:1; however, regular testing is necessary to make appropriate adjustments based on any changes. Acidification in the anaerobic tank can be achieved by adding large amounts of caustic soda (for dissolution and dilution) or lime to adjust the pH to 7. Generally once a day, or twice a day (with the total amount remaining unchanged)
Anaerobic treatment requires fewer nutrients compared to aerobic treatment; the theoretical ratio of carbon to nitrogen to phosphorus is 200–300:5:1. Excess ammonia nitrogen can also poison microorganisms. It is possible to set up a urea dissolution tank and use a metering pump to add urea continuously. Adding caustic soda directly is labor-intensive; it is recommended to use a metering pump for adding liquid caustic soda. Regular testing should be carried out to determine the appropriate dosage and concentration of chemicals. Micro-nutrients can also be added