摘要
以竹炭为载体制备氮铈掺杂改性且固定化微生物及微量元素的生物增效材料,采用生物强化增效技术对废纸制浆造纸废水的好氧处理进行优化,通过降低生化处理出水浓度来降低深度处理的难度和成本。利用SEM和16S rRNA测序等手段对活性污泥表面形貌及结构和微生物菌落结构进行分析,综合评价了生物强化增效技术对废纸制浆废水好氧生物处理性能的影响。研究结果表明:该技术可以提高污染物生物降解能力,提高生物处理效果。普通生化处理出水COD平均值140 mg/L、氨氮平均值2.3 mg/L,色度平均值260倍,平均COD去除率86.47%、平均氨氮去除率88.83%、平均色度去除率33.33%;同等条件下,生物增效处理出水COD平均值72.2 mg/L、氨氮平均值0.95 mg/L、色度平均值50倍,平均COD去除率93.02%、平均氨氮去除率达到了95.39%、平均色度去除率87.18%,处理效果明显优于普通生化处理。生物增效处理出水采用传统PAC或PFS处理均可达到排放标准,且PFS的处理成本低至0.63元/m^(3);而普通生化处理只能采用芬顿处理才能达到排放标准,且处理成本达3.27元/m^(3)。SEM分析结果显示:生物增效处理的活性污泥絮体结构紧凑,具有更高的生物量;与普通生化处理的污泥相比,生物增效处理的污泥中脱硫杆菌门(Desulfobacterota)和拟杆菌门(Bacteroidota)丰度增加了3.07和2.29个百分点,unclassified_o_PB19属增加了2.96个百分点,说明生物增效材料的投加能帮助一些具备特殊降解功能的微生物创造有利生存环境并激活其生长,提高了反应体系的定向降解能力。
Using bamboo charcoal as a carrier,a bioaugmenting materials modified by nitrogen cerium doping and immobilized with microorganisms and trace elements was prepared.The aerobic treatment of waste paper pulping and papermaking wastewater was optimized by bioaugmentation technology,and the difficulty and cost of advanced treatment were reduced by decreasing the effluent concentration of biochemical treatment.The surface morphology,structure and microbial colony of the activated sludge were analyzed by means of SEM and 16S rRNA sequencing,and the effect of bioenhancement technology on the aerobic biological treatment performance of waste paper pulping wastewater was comprehensively evaluated.The results showed that the synergistic technology could improve the biodegradability of pollutants and the biological treatment effect.The average effluent COD was 140 mg/L,the average ammonia nitrogen was 2.3 mg/L,the average color was 260 times,the average COD removal rate was 86.47%,the average ammonia nitrogen removal rate was 88.83%,and the average color removal rate was 33.33%.Under the same conditions,the average effluent COD of synergistic treatment was 72.2 mg/L,the average ammonia nitrogen effluent was 0.95 mg/L,the average effluent chroma was 50 times,the average COD removal rate was 93.02%,the average ammonia nitrogen removal rate reached 95.39%,and the average chroma removal rate was 87.18%.The treatment effect was significantly better than that of ordinary biochemical effluent.The effluent of biological synergistic treatment could meet the discharge standards by traditional PAC and PFS treatments,and the processing cost of PFS was as low as 0.63 yuan/m^(3).However,the ordinary biochemical treatment could only achieve emission standards using Fenton treatment,and the treatment cost reached 3.27 yuan/m^(3).The results of SEM analysis showed that the bioaugmented activated sludge flocs had a compact structure and higher biomass.The abundance of Desulfobacterota and Bacteroidota increased by 3.07 and 2.29 percentage points,and the abundance of unclassified_o_PB19 increased by 2.96 percentage points,indicating that the addition of bio-enhanced materials could help some microorganisms with special degradation functions to create a favorable living environment and activate their growth,and improve the directional degradation ability of the reaction system.
作者
丁来保
朱津苇
杨然
郭奇
田庆文
DING Laibao;ZHU Jinwei;YANG Ran;GUO Qi;TIAN Qingwen(Institute of Chemical Industry of Forest Products,CAF,Key Lab.of Biomass Energy and Material,Jiangsu Province,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing 210042,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2024年第4期9-17,共9页
Chemistry and Industry of Forest Products
基金
江苏省生物质能源与材料重点实验室资助项目(JSBEM-S-202207)
国家重点研发计划资助项目(2022YFC2105505)。
关键词
废纸制浆造纸废水
活性污泥法处理
生物强化增效
碳基改性材料
微生物菌群结构
waste paper papermaking wastewater
activated sludge treatment
bioaugmentation efficiency
carbon-based modified materials
microbial flora structure
