Composite phosphorus-based calcification inhibitor for blocking anaerobic granular sludge calcification and application method

An anaerobic granular sludge, composite phosphorus-based technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Strong, low-cost effect
CN110482696BActive Publication Date: 2020-06-30GUANGXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGXI UNIV
Publication Date
2020-06-30

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Abstract

The invention discloses a composite phosphorus-based calcification inhibitor for blocking the calcification of anaerobic granular sludge and an application method, and relates to the field of industrial wastewater treatment. The formula comprises the following components in parts by mass: 40-85 parts of phosphoric acid, three 10-25 parts of sodium polyphosphate, 5-25 parts of sodium pyrophosphate. In the present invention, in the high calcium-containing wastewater anaerobic granular sludge treatment system, the composite phosphorus-based calcification inhibitor of the present invention is added to the influent of the anaerobic reactor according to the calcium-phosphorus ratio (mass ratio) of 20-35:1. , and then inhibit the free calcium ions from forming calcium deposition inside the granular sludge, and then maintain the activity of anaerobic granular sludge. The invention effectively solves the problem of high calcium content in the fields of waste paper pulping, food processing, landfill leachate, fermentation wastewater, etc. In wastewater treatment, the problem of reducing the treatment capacity of the anaerobic reaction system due to sludge calcification and inactivation has significant application value.
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Description

technical field

[0001] The invention belongs to the field of industrial water treatment, in particular to a compound phosphorus-based calcification inhibitor for blocking anaerobic granular sludge calcification and an application method thereof. Background technique

[0002] Anaerobic biological treatment technology is suitable for the treatment of high-concentration organic wastewater. Among them, anaerobic granular sludge technology is widely used in pulp and paper, monosodium glutamate, soybean / dairy product wastewater, landfill leachate and other fields. Practice has shown over the years that calcium ions (Ca 2+ ) content is high, it will lead to the accumulation of inorganic components such as calcium carbonate and hydroxyapatite in the anaerobic granular sludge, resulting in a decrease in the total effective microbial biomass in the anaerobic reactor and causing the collapse of the anaerobic system. The above phenomenon is called "granular sludge calcification". [0...

Claims

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