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Effect of Calcification on the Characteristics of Granular Sludge in Anaerobic Reactor
Received:August 14, 2024  
DOI：10.11980/j.issn.0254-508X.2024.11.017
Key Words:waste paper pulping wastewater  calcification  granular sludge  microbial community
Fund Project:国家重点研发计划（2022YFC2105505）；国家自然科学基金（22208066）；广西南宁市创新创业领军人才项目（2021001）；江西省教育厅科技项目（GJJ2201725、GJJ151029）；江西省学位与研究生教育教学研究项目（JXYJG2016160）。
Author NameAffiliationPostcode
PENG Ling School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Gaungxi Zhuang Autonomous Region， 530004
School of Chemical and Biological Engineering， Yichun University， Yichun， Jiangxi Province， 336000 		336000
ZHANG Jian School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Gaungxi Zhuang Autonomous Region， 530004 530004
WANG Shuangfei* School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Gaungxi Zhuang Autonomous Region， 530004 530004
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Abstract:This study investigated a calcified anaerobic reactor at a waste paper pulping company， where granular samples were collected over a year. Systematic analysis of the physicochemical and biological properties of the granules revealed that calcium carbonate accumulation during calcification led to increased Ca2+ content， higher ash content， accelerated settling velocity and larger diameter. Prolonged exposure to high-calcium wastewater significantly enhanced the relative abundance of hydrogen-producing acetogens in the bacterial community， while the abundance of hydrolytic bacteria and acidogens declined. In the archaeal community， the original dominant methanogens Methanobacterium decreased， while archaea adapted to the high-calcium environment showed significant growth， such as Bathyarchaeia， Methanolinea， and Candidatus_Methanofastidiosum. These changes in physicochemical properties and microbial community succession provided critical insights into the response mechanisms of granular sludge under calcification stress.
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