Precautions finished biochemical tank with ceramic electric heater

Precautions for sewage treatment in finished biochemical tank with ceramic electric heater

The finished biochemical tank provides sewage treatment with a time program rather than a continuous space program. The biochemical tank system does not require a primary sedimentation tank, a secondary sedimentation tank, and a sludge reflux system. It is ideal for static sedimentation and good separation effect. It can be applied to chemical industry, petroleum, electric power, steel, textile, printing and dyeing, transportation, storage, food brewing, fermentation, water treatment, seawater desalination, etc.

During the operation of the finished biochemical tank, once the microorganisms are impacted by the load (water volume, concentration), the COD removal rate will suddenly decrease, and in severe cases, the sludge will fall off the biological filler, causing the effluent to become mixed. At this time, the water inflow should be stopped immediately, and powdered activated carbon should be added into the biochemical tank to reduce the sludge load. The dosage ratio of powdered activated carbon is 10 kilograms per 100 m3 of biochemical tank volume. After the sedimentation performance of sludge has recovered, a rapid multiplication method of sludge acclimation can be adopted. Domestic sewage or waste alcohol or wet paste cooked with dry flour can be added to the biochemical tank. The dosage ratio is 5-10 kilograms of dry flour per 100 m3 of biochemical tank volume. After 2-3 days, water can be fed and the daily intake increased until the microorganisms return to normal.

(1) At the beginning of the aerobic biochemical tank commissioning, the aeration amount should start from a small amount of air and gradually increase with the increase of wastewater inflow, ensuring that the dissolved oxygen in the wastewater in the biochemical tank is about 2-4mg/l.

(2) During the commissioning phase, the incoming and outgoing water quality of the anaerobic tank and the aerobic biochemical tank should be sampled and tested every week to understand the water quality changes and grasp the biofilm growth status.

(3) Under hydraulic impact, bundle fillers in anaerobic and aerobic biochemical tanks may experience fiber bundle entanglement, agglomeration, and fracture. The entanglement and agglomeration may be caused by poor installation, and can be solved by appropriately increasing hydraulic load and aeration intensity. The fiber bundle is broken and should be replaced in a timely manner.

(4) Anaerobic and aerobic biochemical tanks should reserve a bundle of elastic three-dimensional filler, with the upper end of the rope tied to the guardrail of the operating platform. The filler part naturally falls into the waste water, and the lower end should not be fixed. After debugging for a period of time or during daily operation, this bundle of filler can be pulled out of the water surface to check the growth of the biofilm.

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