Method and device for fast cultivation of anaerobic granular sludge for treating swine wastewater

Abstract

The invention discloses a method and device for fast cultivation of anaerobic granular sludge for treating swine wastewater. The method is characterized by comprising the steps of: firstly, completely soaking deactivated cation exchange resin by using a sodium hydroxide solution with the mass concentration of 3-5% for 5-6h, washing the soaked cation exchange resin to be neutral by using water, and then, completely soaking the neutral cation exchange resin for 5-6h by using hydrochloric acid with the mass concentration of 5% to complete the regeneration of the strong-acid type cation exchange resin. Before the diluted swine wastewater is added into an anaerobic cultivation device, the regenerated strong-acid type cation exchange resin is put in the anaerobic cultivation device, and by means of controlling the temperature, alkalinity, pH value and the like inside the anaerobic cultivation device to gradually increase influent concentration, reduce hydraulic retention time and the like, the anaerobic granular sludge with good settling property is obtained when the chemical oxygen demand (COD) removal rate of effluent of the anaerobic cultivation device is 80-90%. Cultivated strains are stable in property, and the anaerobic granular sludge is quick in maturity, high in activity and short in cultivation period. The device is reasonable in structure and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to a rapid cultivation method of anaerobic granular sludge for treating pig wastewater and a device thereof. Background technique [0002] Anaerobic wastewater treatment can be used as the core technology of an integrated system combining environmental protection, energy recovery and good ecological cycle. However, microorganisms in the anaerobic reactor are sensitive to toxic substances, and the activity of granular sludge in the reactor is easily affected by the outside world and loses its activity. activity, leading to a decline in the effectiveness of the reactor in treating wastewater. Therefore, cultivating better anaerobic granular sludge is the key to improving the treatment effect of anaerobic reactors. The microbial flora that can participate in the decomposition of complex organic matter and generate methane in anaerobic granular sludge include hydr...

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Problems solved by technology

These functional flora grow and reproduce in the anaerobic granular sludge, and various bacteria intergrow with each other, and the hyphae are interlaced and combined with each other to form a complex flora structure, which also increases the complexity of microbial composition identification.

China Invention Publication (Announcement) No.: CN102557248A discloses "a method for rapid cultivation of anaerobic granular sludge", which can make broken granular sludge quickly form anaerobic sludge again by adding cationic polyacrylamide to the anaerobic reactor. Oxygen granular sludge, the disadvantage of this method is that microbial flocculants need to be added to the anaerobic reactor, the external environment has a great influence on the activity of granular sludge, and the technical requirements are high, so it is not easy to operate

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