生物炭强化生物滤池处理农村生活污水效果及碳排放
X703.1; 为研究生物炭对生物滤池强化作用及其在"双碳"背景下碳排放量与去除效果相结合的评估方法,以秸秆生物炭强化曝气生物滤池为研究对象,在中温环境(25～30℃)下,探究了生物炭强化生物滤池的挂膜启动时间、处理能力、稳定性以及日碳排放量.结果表明,滤池的挂膜时长为14d;当水力负荷和进水流量分别为0.045m3/(m2·h)和0.9m3/d时,系统的最佳进水水力停留时间为8h,化学需氧量、氨氮、总氮和总磷的平均去除率分别为95.0％、79.1％、62.5％、78.4％;当水力停留时间和进水流量分别为8h和1.2 m3/d,系统最佳的水力负荷为0.030m3/(m2·h...
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| Published in | 农业工程学报 Vol. 40; no. 2; pp. 315 - 322 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
南昌大学资源与环境学院,鄱阳湖环境与资源利用教育部重点实验室,南昌 330031%萍乡学院材料与化工工程学院,萍乡 337000%九江市共青城生态环境局,九江 332020
2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.202310134 |
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| Abstract | X703.1; 为研究生物炭对生物滤池强化作用及其在"双碳"背景下碳排放量与去除效果相结合的评估方法,以秸秆生物炭强化曝气生物滤池为研究对象,在中温环境(25～30℃)下,探究了生物炭强化生物滤池的挂膜启动时间、处理能力、稳定性以及日碳排放量.结果表明,滤池的挂膜时长为14d;当水力负荷和进水流量分别为0.045m3/(m2·h)和0.9m3/d时,系统的最佳进水水力停留时间为8h,化学需氧量、氨氮、总氮和总磷的平均去除率分别为95.0％、79.1％、62.5％、78.4％;当水力停留时间和进水流量分别为8h和1.2 m3/d,系统最佳的水力负荷为0.030m3/(m2·h),平均去除率分别为95.3％、87.4％、68.1％、79.0％;在系统运行过程中,不同时期悬浮球与陶粒上胞外聚合物(extracellular polymeric substances,EPS)含量相比刚驯化污泥上EPS的含量都有所增加,表明了生物滤池在实际运行过程中比较稳定且污泥活性也比较好;在8 h的最佳水力停留时间以及进水流量0.9 m3/d的条件下,曝气生物滤池使污水达标排放的碳排放量为9.08 kg/d,因此采用生物炭强化曝气生物滤池处理农村生活污水具有较高的应用前景. |
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| AbstractList | X703.1; 为研究生物炭对生物滤池强化作用及其在"双碳"背景下碳排放量与去除效果相结合的评估方法,以秸秆生物炭强化曝气生物滤池为研究对象,在中温环境(25～30℃)下,探究了生物炭强化生物滤池的挂膜启动时间、处理能力、稳定性以及日碳排放量.结果表明,滤池的挂膜时长为14d;当水力负荷和进水流量分别为0.045m3/(m2·h)和0.9m3/d时,系统的最佳进水水力停留时间为8h,化学需氧量、氨氮、总氮和总磷的平均去除率分别为95.0％、79.1％、62.5％、78.4％;当水力停留时间和进水流量分别为8h和1.2 m3/d,系统最佳的水力负荷为0.030m3/(m2·h),平均去除率分别为95.3％、87.4％、68.1％、79.0％;在系统运行过程中,不同时期悬浮球与陶粒上胞外聚合物(extracellular polymeric substances,EPS)含量相比刚驯化污泥上EPS的含量都有所增加,表明了生物滤池在实际运行过程中比较稳定且污泥活性也比较好;在8 h的最佳水力停留时间以及进水流量0.9 m3/d的条件下,曝气生物滤池使污水达标排放的碳排放量为9.08 kg/d,因此采用生物炭强化曝气生物滤池处理农村生活污水具有较高的应用前景. |
| Abstract_FL | Biochar can be expected to serve as a biofilter filler for wastewater treatment.But it is still stayed in the laboratory stage at present.Only a few reports on the biochar and other filter materials combined to strengthen the pilot biofilter for the treatment of rural domestic sewage.A single removal rate is only considered to evaluate the performance and carbon emission.However,this assessment cannot fully meet the requirements of the new"dual carbon"targets.Taking the biochar-enhanced biological aerated filter as the research object,this study aims to investigate the biofilm start-up time,treatment ability of rural domestic sewage,stability,and daily carbon emission under medium temperature environment(25-30℃).The results showed that the hanging time of the filter was 14 days with the activated sludge inoculation,and the removal rate of the chemical oxygen demand(COD)and ammonia nitrogen(NH4+-N)in the aerated biofilter was stable at more than 90％,while the removal rate of NH4+-N was stable at more than 80％.At the same time,1-2 mm transparent yellowish-brown biofilm was observed on the suspended sphere filler.When the hydraulic load and influent flow rate were 0.045 m3/(m2.h)and 0.9 m3/d,the optimum influent hydraulic retention time of the system was 8 h,and the average removal rates of chemical oxygen demand,ammonia nitrogen,total nitrogen,and total phosphorus were 95.0％,79.1％,62.5％,and 78.4％,respectively;When the influent hydraulic retention time and influent flow rate were 8 h and 1.2 m3/d.respectively,the optimum hydraulic load was 0.030 m3/(m2-h),and the average removal rates of chemical oxygen demand,ammonia nitrogen,total nitrogen,and total phosphorus were 95.3％,87.4％,68.1％,and 79.0％,respectively.The effluent concentrations of COD,NH4+-N,TN,and TP fully met the second-level discharge standards in Jiangxi Province's"Discharge Standards for Water Pollutants in Rural Domestic Sewage Treatment and Disposal Facilities"(DB 36/1102-2019).Extracellular polymeric substances(EPS)in different periods were extracted from the suspended spheres and ceramic particles.The contents of EPS were analyzed by UV-vis full-wavelength scanning with a UV-visible spectrophotometer(DR6000).It was found that there was an increase in the EPS content on the suspended spheres and ceramic particles in the different periods,compared with D0.It infers that the biofilter was stable for better sludge activity in the actual operation.The COD was monitored to collect and sort the energy consumption data.The carbon balance equation was established to calculate the overall carbon emission by total organic carbon(TOC).Therefore,the carbon emission of the wastewater discharged by the biological aerated filter was 9.08 kg/d under the optimal hydraulic retention time of 8 h and an inlet flow rate of 0.9 m3/d.Therefore,the biochar-enhanced biological aerated filter can provide a high application prospect to treat rural domestic sewage. |
| Author | 吴代赦 王方磊 占宇辉 张季 罗枭 罗旭东 马志飞 |
| AuthorAffiliation | 南昌大学资源与环境学院,鄱阳湖环境与资源利用教育部重点实验室,南昌 330031%萍乡学院材料与化工工程学院,萍乡 337000%九江市共青城生态环境局,九江 332020 |
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| Keywords | 污水处理 sewage treatment biochar 生物炭 countryside aeration 曝气 生物滤池 biological filter 农村 |
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| Title | 生物炭强化生物滤池处理农村生活污水效果及碳排放 |
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