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What issues should be paid attention to during anaerobic tower operation (Part 2)

Release time:

2022-12-12 13:39

The previous article shared anaerobic tower the first half of what to pay attention to in the work, if you haven't checked, click: anaerobic tower What to pay attention to in the work (Part 1) In addition to the above, the following matters also need to be noted.
(4) The sludge load should be appropriate. To maintain the balance of the three stages of the anaerobic digestion process, balance the generation and consumption of intermediate products such as volatile fatty acids, and prevent acid accumulation from causing a decrease in pH value, the influent organic load should not be too high, generally not 0.5kgCODcr/(kgMLSS·d). By increasing the sludge concentration in the reactor, a higher volumetric load can be obtained under relatively low sludge load conditions. Generally speaking, the volumetric load of anaerobic digestion devices is above 5kg CODcr/(m3·d), and even as high as 50kg CODcr/(m3·d).
(5) When the concentration of suspended solids in the wastewater to be treated is relatively large (generally referring to more than 1000mg/L), the wastewater should be subjected to appropriate pretreatment such as sedimentation, filtration, or flotation to reduce the content of suspended solids in the influent and prevent clogging of the packing layer. Generally, the influent suspended solids of AF do not exceed 200mg/L, but if the suspended solids are biodegradable and evenly dispersed in the wastewater, the suspended solids will have almost no adverse effect on AF.
(6) A sufficient anaerobic environment should be created. Anaerobiosis is a prerequisite for the normal activity of anaerobic microorganisms, and methanogens must be in an absolutely anaerobic environment to function efficiently. In the process of wastewater lifting into the anaerobic digestion device, effluent reflux, etc., contact with air should be avoided as much as possible, and opportunities for contact with air should be reduced as much as possible. For example, try to avoid water falling and stirring during the water flow process, cover and seal the regulating pool and reflux pool, and do not use air-lift pumps for wastewater lifting. The anaerobic reaction structure should preferably undergo an airtight test to ensure that it is airtight and leak-proof.
Shandong Zhiyuan Environment Engineering Co., Ltd. specializes in the design and general contracting of various industrial wastewater, waste gas, and high-concentration organic wastewater treatment projects. If you have any questions, please feel free to contact us.

Anaerobic tower

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Practical application of IC tower in food processing wastewater treatment

Wastewater from the food processing industry contains a large amount of organic matter, suspended solids, and oils. Traditional treatment methods often face problems such as high energy consumption and long processing cycles. The IC tower (internal circulation anaerobic reactor), with its unique internal circulation structure and three-phase separation system, demonstrates technical adaptability in treating high-concentration organic wastewater. The core advantage of the IC tower lies in its internal circulation mechanism. Through the fluid movement of the internal rising and falling pipes, it achieves thorough mixing of sludge and wastewater, improving biodegradation efficiency. In food wastewater treatment, the IC tower can adapt to influent conditions with a wide range of COD concentrations, especially suitable for the dairy, meat processing, and brewing industries. Practice has shown that when treating oily wastewater, the IC tower can stably achieve a COD removal rate that meets emission standards by reasonably controlling the hydraulic retention time and organic load. In an actual engineering case, a large seasoning production enterprise used the IC tower as a pretreatment unit. The influent COD concentration ranged from 8000-12000mg/L, and after treatment by the IC tower, it was reduced to below 1500mg/L, significantly reducing the burden on the subsequent aerobic treatment unit. The operating data shows that the biogas yield of the IC tower is stable and can be used for energy recovery, further reducing treatment costs.

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The effectiveness of IC tower in treating high-concentration organic wastewater

The IC tower (internal circulation anaerobic reactor) is an important piece of equipment in modern wastewater treatment, demonstrating significant technical characteristics in treating high-concentration organic wastewater. Its unique internal circulation system enhances the contact efficiency between sludge and wastewater, making the organic matter degradation process more thorough and showing clear adaptability in treating industrial wastewater with a COD concentration exceeding 3000 mg/L. The treatment effect of this technology is mainly reflected in two dimensions: organic matter removal rate and biogas production. Actual operating data shows that in wastewater treatment for industries such as brewing and food processing, the IC tower usually maintains a high COD removal rate. The granular sludge formed inside the reactor has good settling performance, ensuring the stability of system operation. When the temperature is controlled around 35℃, the microbial activity reaches an optimal state, and the treatment effect is relatively ideal. In the process of treating high-concentration organic wastewater, the volumetric loading capacity of the IC tower is a key indicator that distinguishes it from traditional anaerobic processes. Due to its multi-stage reaction zone design and internal circulation flow pattern, the equipment can withstand high organic load shocks. Pharmaceutical wastewater treatment cases show that the system can still maintain stable operation when the influent COD fluctuates between 5000-8000 mg/L.

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Why are IC towers considered the "quality gatekeepers" of semiconductor packaging and testing plants?

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