Two-phase two-period anaerobic organism reactor for processing wastewater

Abstract

The invention discloses a two-phase tow-period anaerobic organism reactor processing wastewater. The reactor comprises a reactor body, a circulation tank, an alkali adding device, a biological phase separator, a primary three-phase separator and a secondary three-phase separator, wherein the circulation water tank and the alkali adding device are arranged on the outer side of the reactor body, and the biological phase separator, the primary three-phase separator and the secondary three-phase separator are arranged in the reactor body from bottom to top, a closed acidification reaction chamberis arranged at the lower part of the reactor body, and the biological phase separator is arranged at the top in the acidification reaction chamber; a methane-generating main reaction area is formed between the upper part of the acidification reaction chamber and the primary three-phase separator, and a methane-generating fine processing area is formed between the primary three-phase separator andthe secondary three-phase separator. The anaerobic organism reactor provided by the invention has the advantages that the structure is compact, the occupying area is small, the organic load reaches to 40kg COD (chemical oxygen demand) / (m<3>.d) when the reactor is used for processing high-concentration wastewater generated by pulping and paper making or similar wastewater, and the stability and the flexibility are extremely high when the reactor is used for processing wastewater with variable water quantity and water quality.

Description

technical field [0001] The invention relates to an anaerobic reactor, in particular to a two-phase two-stage anaerobic bioreactor for treating waste water. Background technique [0002] Anaerobic biological treatment technology is one of the important technologies in organic wastewater treatment. The anaerobic reactor is the core of anaerobic biological treatment technology. Traditional anaerobic reactors include UASB, anaerobic filter bed, anaerobic fluidized bed, etc. At present, these anaerobic reactors are widely used in the wastewater treatment industry, but they often suffer from low organic load, can not withstand large impact load, poor operation stability, easy to block the filter bed, easy to lose sludge, and the reactor volume Large, difficult to maintain and other disadvantages. The IC anaerobic reactor and EGSB anaerobic reactor developed in recent years have made some breakthroughs and solved some problems on UASB, including: (1) Strengthening mud-water tran...

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Problems solved by technology

However, there are still some problems in this type of improved anaerobic reactor, including: (1) Granular sludge is easy to foul when treating wastewater containing suspended solids, calcium, magnesium, etc., resulting in reactor blockage and a sharp drop in treatment efficiency. Re-add activated sludge after shutdown and cleaning

(2) It is difficult to form an internal circulation when starting, and the starting time is long, and a large amount of floating mud is easy to accumulate under the gas collecting tank, which blocks the gas collecting tank, making it difficult to maintain a stable and efficient lifting

(3) When treating organic wastewater containing toxic substances, the methanogenic bacteria in the traditional single-phase anaerobic reactor directly contact the toxic substances, and their proliferation rate is often lower than the decay rate, resulting in the anaerobic treatment process cannot maintain long-term high efficiency

(4) At present, the three-phase separator cannot effectively achieve three-phase separation at a higher flow rate, and the anaerobic reactor is prone to serious sludge loss

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