Method and reactor for simultaneous treatment of high-concentration ammonia nitrogen wastewater by cultivating algal granular sludge

Abstract

The invention provides a method and a reactor for cultivating algal granular sludge to simultaneously treat high-concentration ammonia nitrogen wastewater. The method for cultivating algal granular sludge to simultaneously treat high-concentration ammonia nitrogen wastewater includes the following steps: making the high-concentration ammonia nitrogen wastewater enter the reactor , adding aerobic activated sludge and the first nitrogen-containing raw material to the reactor to domesticate the nitrosifying bacteria; adding the first carbon-containing raw material and the second nitrogen-containing raw material to the reactor to domesticate the denitrifying bacteria; Microalgae is added to the reactor, and the second carbon-containing raw material and the third nitrogen-containing raw material are added to the reactor by lighting equipment, so that the microalgae and nitrosating bacteria are aggregated and adhered to the denitrifying bacteria, and the cultivation of algal granular sludge is completed. The present invention provides nutrients for growth of nitrifying bacteria and denitrifying bacteria by using high-concentration ammonia nitrogen wastewater, accelerates the growth of nitrifying bacteria and denitrifying bacteria, and adds microalgae to strengthen the particle structure in the aerobic activated sludge , to prevent disintegration under the influence of high ammonia nitrogen load of high concentration ammonia nitrogen wastewater.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of sewage and wastewater treatment, and more particularly, to a method and a reactor for cultivating algal granular sludge to simultaneously treat high-concentration ammonia nitrogen wastewater. Background technique [0002] With the improvement of sludge treatment requirements, anaerobic digestion process has been used more and more to reduce and stabilize sludge in sewage treatment plants. However, a large amount of nitrogen is released during the anaerobic digestion process, which makes the digested sludge dewatering liquid (the digested sludge dewatering liquid specifically includes the supernatant of the sludge thickening tank and the supernatant of the sludge digestion tank) discharged during the anaerobic treatment of the sludge. Liquid) ammonia nitrogen concentration up to 500-1300mg / L, phosphate concentration up to 200mg / L. Due to the low carbon-nitrogen ratio and high amm...

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Problems solved by technology

[0004] The embodiment of the present invention aims at the problems of high operating cost, long treatment period and insufficient practicability of the above-mentioned existing treatment method using aerobic granular sludge technology, and provides a method for synchronously treating high-concentration ammonia nitrogen wastewater by cultivating algae granular sludge and reactor

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