摘要
为探究生物炭对活性污泥特征及脱氮除磷的影响,该文在中温条件下,采用序批式反应器,考察了不同类型基质生物炭对活性污泥处理城镇低C/N废水的影响。结果表明,生物炭降低了污泥体积指数,提高了混合液挥发性悬浮固体,利于微生物的增殖。此外,生物炭提高了活性污泥胞外聚合物(EPS)含量,在鸡粪生物炭、玉米秸秆生物炭和污泥生物炭存在的组别内,EPS的含量分别升高至41.3、46.5和39.8 mg/g,显著高于对照组。生物炭主要提高了EPS内蛋白质(PN)的含量,而对多糖(PS)含量影响不显著,进而提高了PN/PS。生物炭强化了活性污泥对氨氮及总磷的去除,而对化学需氧量的影响不显著。生物炭作为载体微生物提供良好附着进而提高微生物活性,此外,生物炭能吸附氨氮与总磷。
In order to explore the impact of biochar on the characteristics of activated sludge and nitrogen and phosphorus removal,the effect of different types of biochar on the treatment of urban low C/N wastewater by activated sludge was investigated in a sequencing batch reactor at medium temperature.The results showed that biochar reduced the sludge volume index,increased the volatile suspended solids in the mixture,improving the proliferation of microorganisms.In addition,the content of extracellular polymeric substances(EPS)increased to 41.3 mg/g,46.5 mg/g and 39.8 mg/g in the presence of chicken manure biochar,corn straw biochar and sludge biochar,which were significantly higher than those in the control group.Biochar mainly increased the content of protein(PN)in EPS,but had no significant effect on the content of polysaccharide(PS),and then increased PN/PS.Biochar enhanced the removal of ammonia nitrogen and total phosphorus by activated sludge,but had no significant effect on chemical oxygen demand.In addition,biochar could adsorb ammonia nitrogen and total phosphorus.
作者
李茜
赵雄
康虹
王洋洋
LI Qian;ZHAO Xiong;KANG Hong;WANG Yangyang(School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an 716000,China;Yan’an Water Environmental Protection Group Co.Ltd.,Yan’an 716000,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第7期140-144,共5页
Environmental Science & Technology
基金
延安市科技计划项目(SL2019ZCSY-008)
延安大学2020年国家级创新创业训练计划项目(S202010719041)
关键词
生物炭
污泥特征
脱氮除磷
胞外聚合物
蛋白质
biochar
sludge characteristics
nitrogen and phosphorus removal
extracellular polymer
protein
