External circulation granular sludge anaerobic reactor system with large height-diameter ratio

Abstract

The invention discloses an external circulation granular sludge anaerobic reactor system with a large height-diameter ratio, and relates to the technical field of wastewater anaerobic treatment. The system comprises a homogenizing regulation tank, an anaerobic reactor, an anaerobic reactor system effluent distribution pipe, a chemical adding pipeline, a jet mixing system, a first-stage DUO type full-coverage multichannel three-phase separator, a second-stage DUO type full-coverage multichannel three-phase separator, an anaerobic effluent collection pipe, a pot-shaped pulse water distribution system, a double-path pulse feeding system, a first anaerobic reaction zone, a second anaerobic reaction zone, a third anaerobic reaction zone and a fourth anaerobic reaction zone. According to the invention, the problem of blockage of the water distribution system in treatment of papermaking wastewater containing high-concentration calcium ions is avoided, strong rotational flow generated in the pot-shaped water distribution system can be avoided, and blockage of water distribution slits is prevented; compared with comparative analysis of an IC internal circulation anaerobic reactor, the invention has a more stable and efficient treatment effect and has a wide application prospect.

Description

Technical field[0001]The invention belongs to the technical field of wastewater anaerobic treatment, and particularly relates to an external circulation large height-to-diameter ratio granular sludge anaerobic reactor system, which is widely used in the field of anaerobic treatment of high-concentration organic wastewater that can form good anaerobic granular sludge. , Such as food processing wastewater, brewery wastewater, pulp and paper production wastewater, citric acid production wastewater, biological fermentation pharmaceutical wastewater, certain chemical wastewater, etc.Background technique[0002]Anaerobic treatment process is widely used in industrial wastewater. The anaerobic process on the market is mainly divided into low-speed anaerobic reactor (low volume load rate) and high-speed anaerobic reactor (high volume load rate). Oxygen reactors mainly include UASB (upflow anaerobic sludge bed), CSTR (continuously stirred anaerobic reactor), ABR (baffled anaerobic reactor), et...

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Problems solved by technology

[0004] 1. IC internal circulation anaerobic reactor is the most widely used paper industry. Due to the high concentration of calcium ions in wastewater caused by water conservation in the paper industry in recent years, it has led to calcification of granular sludge, internal risers and downpipes of anaerobic reactors. And the serious fouling and clogging of the inverted umbrella-shaped slit water distribution system eventually led to a decrease in the efficiency of the IC anaerobic reactor, which has become the biggest problem in the anaerobic treatment of wastewater in this industry;

[0005] 2. The rising flow rate of liquid and biogas in the IC internal circulation anaerobic reactor is too high (up to 20m / h or more), and the granular sludge in the reactor is completely retained in the anaerobic reactor by its own weight. Anaerobic granular sludge with smaller particles is often washed out of the anaerobic reactor

When the rate of large-sized anaerobic granular sludge generated during wastewater anaerobic treatment is lower than the loss rate of small-sized anaerobic granular sludge, the total amount of anaerobic granular sludge in the IC internal circulation anaerobic reactor will be reduced. As a result, the treatment efficiency of the IC anaerobic internal circulation anaerobic reactor decreases;

[0006] 3. The top of the IC internal circulation anaerobic reactor routinely adopts the outlet water collection mode of the overflow weir. When the level of the adjustment of the water outlet weir plate is deviated or the weir plate is fixed and loose during long-term operation, it will cause unevenness of the water outlet.

[0008] 5. The IC internal circulation anaerobic reactor lacks a biogas storage and voltage stabilizing device system, and must be equipped with a biogas voltage stabilizing cabinet, which increases the risk of safe utilization of biogas

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