Culture method for anaerobic granular sludge for acrylic waste water biochemical treatment

Abstract

The invention relates to a culture method for anaerobic granular sludge for acrylic waste water biochemical treatment, belonging to the technical field of waste water treatment. According to the culture method, a culture process for the granular sludge is divided into three stages, a sludge domestication stage is a process for inoculating the sludge to be adaptive to the water quality of acrylic waste water, reserving high-quality strains, and eliminating the other strains; a sludge granulation stage is the key stage of the culture for the anaerobic granular sludge, and the anaerobic granular sludge needs to be controlled in the aspects of water inlet organic matter concentration, ascending flow velocity, organic load, water inlet basicity, pH, nutrient elements, temperature, trace elements, flocculant pouring and the like; and when the grain ratio increasing speed of the granular sludge is sharply reduced, and the removal rate for effluent CODCr (chemical oxygen demand Cr) is stabilized to be greater than 70%, a mature stage for the granular sludge is entered, and the entrance in the mature stage indicates that the culture for the granular sludge is finished. With the culture method, the problem that a method for culturing common anaerobic granular sludge is not suitable for culturing anaerobic granular sludge aiming at acrylic waste water is solved, and the successful culture for the granular sludge is effectively ensured.

Description

technical field [0001] The invention relates to a method for cultivating anaerobic granular sludge used for biochemical treatment of acrylic acid wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Acrylic acid wastewater has high organic content (COD can be as high as tens of thousands mg / L), complex and toxic components (containing acetic acid, methacrylic acid, acrylic acid, formaldehyde, acetaldehyde, etc.), and is mostly strongly acidic (pH between 1.5-3 ), lack of nutrients, is a kind of difficult-to-treat industrial wastewater. At present, the processes for the treatment of acrylic acid wastewater include incineration, wet catalytic oxidation and biological methods. [0003] The incineration method is to atomize the wastewater and spray it into a high-temperature combustion furnace to completely vaporize the water mist, so that the organic matter in the wastewater is completely oxidized in the furnace and decomposed int...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the method for cultivating general anaerobic granular sludge is not suitable for cultivating anaerobic granular sludge for acrylic acid wastewater, and proposes a method for treating anaerobic granular sludge of acrylic acid wastewater training method