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Application of subsurface wastewater infiltration system to on-site treatment of domestic sewage under high hydraulic loading rate

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Water Science and Engineering 2015年第1期8卷 49-54页

作者： Ying-hua Li Hai-bo Li Xin-yang Xu Xuan Gong Yong-chun Zhou School of Resources and Civil Engineering Northeastern University

In order to enhance the hydraulic loading rate （HLR） of a subsurface wastewater infiltration system （SWIS） used in treating domestic sewage, the intermittent operation mode was employed in the SWIS. The results show that the intermittent operation mode contributes to the improvement of the HLR and the pollutant removal rate. When the wetting-drying ratio （RwD） was 1.0, the pollutant removal rate increased by （13.6 ± 0.3）% for NH3-N, （20.7 ± 1.1）% for TN, （18.6± 0.4）% for TP, （12.2 ± 0.5）% for BOD, （10.1 ± 0.3）% for COD, and （36.2 ± 1.2）% for SS, compared with pollutant removal rates under the continuous operation mode. The pollutant removal rate declined with the increase of the HLR. The effluent quality met The Reuse of Urban Recycling Water - Water Quality Standard for Scenic Environment Use （GB/T 18921-2002） even when the HLR was as high as 10 cm/d. Hydraulic conductivity, oxidation reduction potential （ORP）, the quantity of nitrifying bacteria, and the pollutant removal rate of NH3-N increased with the decrease of the RWD. For the pollutant removal rates of TP, BOD, and COD, there were no significant difference （p 〈 0.05） under different RwDS. The suggested RWD was 1.0. Relative contribution of the pretreatment and SWlS to the pollutant removal was examined, and more than 80% removal of NH3-N, TN, TP, COD, and BOD occurred in the SWIS.

关键词： domestic sewage Subsurface wastewater infiltration system Intermittent operation mode Hydraulic loading rate Pollutant removal rate

Effects of temperature on the degradation pathway of domestic sewage in upflow anaerobic sludge blanked reactor

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Journal of Harbin Institute of Technology(New Series) 2011年第5期18卷 26-30页

作者：杨晓南赫俊国崔福义贾学斌 School of Municipal and Environmental Engineering Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology School of Civil Engineering Heilongjiang University

To understand the anaerobic degradation pathway of domestic sewage,three lab-scale upflow anaerobic sludge blanked reactors (UASB) were employed to study the degradation pathway of different particle size and the effect of temperature on this *** the operation conditions of the hydraulic retention time of 24 h,the MLVSS of approximate 11200 mg·L-1 and the water temperature at 10,15 and 20℃,the overall degradation pathway of soluble fraction was characterized according to zero-order *** for the colloidal fraction (between 0.45 and 4.5 μm),the degradation processes followed a first-order kinetic,and should firstly disintegrated into soluble fraction before finally *** contrast,suspended solids (bigger than 4.5 μm) degraded to soluble and colloidal fractions according to first-order kinetics,and the colloidal fraction originating from suspended solids further degraded into soluble fraction which had the same degradation kinetics as the original soluble *** existed the difference of temperature effect on different fraction *** the temperature at 20,15 and 10 ℃,the first-order rate constant of suspended solids depredating into collide was 4.97,3.01 and 1.01 d-1 *** the degradation of collide to soluble fraction was slightly affected by the temperature *** the other hand,the zero-order degradation rate constant of soluble fraction was 0.26,0.18 g and 0.12 gCOD·gVSS-1d-1,respectively.

关键词： UASB degradation pathway domestic sewage temperature

Effect of domestic sewage on growth of phytoplankton-mathematical model

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Journal of Environmental Sciences 1991年第1期3卷 59-69页

作者： Luo Xiaohong, Zeng Jiye, Zheng Zhihong and Wu YuduanXiamen University,Xiamen 361005,China

A mathematical model relating to the change in phytoplankton biomass in the period of growth and nutrient concentration in the media was proposed on the basis of the Monod equation and was testified by simulation experiments. Analysis of the experiment data showed that: the half-saturation constants for growth Kp (μmol/L) for Skeletonema, Chaetoceros and Prorocentrum were 5.52, 1.90 and 0.46, respectively; the balance between stimulation of nutrients and the inhibition of some other materials was found in the effect of domestic sewage on algal growth and the stimulation played a leading role; domestic sewage was more stimulative on dinoflag-ellate than on diatom and chlorophyte when the assemblage of the algae was cultured. The experiment suggested that mathematical model reasonably explained the characteristics of phytoplankton growth in different nutrient conditions and was worthy to be further improved for eutrophication prediction in off-shore water.

关键词： domestic sewage phytoplankton eutrophication nutrient mathematical model.

Research Progress Related to Rural domestic sewage Treatment

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Agricultural Sciences 2023年第6期14卷 775-784页

作者： Yu Wang Xiujuan Wang College of Public Administration Shandong Agricultural University Tai’an China

Rural domestic sewage treatment is an important part of the rural revitalization strategy and a key action to build a livable, livable and beautiful countryside. This paper composes and summarizes the relevant studies on rural domestic sewage treatment from the governance techniques and modes of governance subjects and research perspectives, in order to provide reference for the implementation of rural revitalization strategy and rural domestic sewage treatment research and action implementation.

关键词： Countryside domestic sewage sewage Treatment

Kinetics of Treated domestic sewage Disinfection through Catalytic Oxidation with H2O2

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Journal of Chemistry and Chemical Engineering 2011年第11期5卷 995-1001页

作者： Gean Delise Leal Pasquali Vargas Deisi Spricigo Humberto Jorge Joss Regina de Fatima Peralta Muniz Moreira Department of Chemical and Food Engineering Federal University of Santa Catarina Campus Universit6rio-TrindadeFlorian6polis 88040-900 Brazil

The inactivation of bacterial cells through catalyzed oxidation using hydrogen peroxide as the primary oxidant agent is dependent on a series of factors, such as the concentration of the catalyst, the rate of hydroxyl radical formation in the controlled decomposition of the oxidant agent, and the concentration and toxicity of hydrogen peroxide. The objective of this study was to develop a mathematical model able to predict the kinetics of the inactivation Escherichia coli and total coliforms cells present in treated domestic sewage through catalytic peroxidation. The catalyst used was iron oxide supported on mineral coal （called CP）, and the effects of the operational conditions, including hydrogen peroxide concentration and dosage of catalyst, were evaluated. The results showed that the disinfection kinetics of the treated domestic sewage is dependent on the concentrations of hydrogen peroxide and catalyst dosage. The kinetic model was shown to be able to predict the behavior of the inactivation kinetics of the bacterium Escherichia coli ATCC-25922 when different concentrations of hydrogen peroxide （75 and 100 mg·L^-1） were used, regardless of the catalyst dosage.

关键词： Disinfection domestic sewage kinetics catalytic oxidation Escherichia coli total coliforms

Application of Constructed Wetland in Treating Rural domestic sewage in Guangxi

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Meteorological and Environmental Research 2016年第1期7卷 52-54页

作者： Chen Zhiming Lin Hua Fan Yongji Huang Fuping Xie Hong Feng Bo Tang Li Mo Zhaoyu Scientific Research Academy of Guangxi Environmental Protection Nanning 530022 China

We provide a brief overview of the constructed wetland treatment technology and list two demonstration cases of its application in treating rural domestic sewage in Guangxi and its effect. Meanwhile, existing problems... 详细信息

关键词： Constructed wetland Countryside domestic sewage Application China

Study on Pre-treatment of the domestic sewage by Water-dropping Aeration Zeolite Bed Technology

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Meteorological and Environmental Research 2012年第10期3卷 48-51页

作者： GAO Chang-fei Liaoning Nuclear and Radiation Monitoring Center

[ Objective] The research aimed to study pre-treatment effect of the domestic sewage by water-dropping aeration zeolite bed technology. [ Method] By water-dropping aeration manner, we conducted sewage reoxygenation. Zeolite was used to replace traditional contact oxidization fill- er. We inspected oxygenation effect of the water-dropping aeration manner and removal efficiency of the pollutant in sewage after biological contact oxidation. [ Result] Under the experimental condition with water-dropping heights of 0.30, 0.45 and 0.60 m, average added values of the dissolved oxygen for raw water were respectively 2.4, 3.6 and 4.2 rag/l_ after water-dropping aeration. Under the situation with average HRT of 2 h, when COD, TN and TP of the influent were respectively 309.0 -464.0, 33.3 -95.0 and 4.0 -7.5 mg/L, their corresponding average removal rates were 47.25%, 46.39% and 40.75%. [ Conclusion] The research conducted useful attempt for high-efficiency and low-cost treatment of the domestic sewaqe in rural area.

关键词： Water-dropping aeration Zeolite bed domestic sewage China

Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system

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Journal of Environmental Sciences 2024年第4期138卷 132-140页

作者： Chen Xu Zuxin Xu Wenhai Chu Shanshan Wu Rong Xiao Lei Su State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China Guangzhou Resource Environmental Protection Technology Co. Ltd.Guangzhou 510030China

The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological *** a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in ***,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the *** induces seasonal or year-round black and stink phenomena in urban ***,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is *** a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino *** comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关键词： Urban drainage system Oxygen-consuming substances domestic sewage Amino acid

Enhanced nitrogen removal at low temperature with mixed anoxic/oxic process

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Water Science and Engineering 2023年第1期16卷 67-75页

作者： Xiang-kun Li Ying-jun Yang Gai-ge Liu Dou-dou Sun Xiao-chen Ma School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China School of Environment Harbin Institute of TechnologyHarbin 150090China

Different hydraulic retention times(HRTs)were tested in a mixed anoxic/oxic(A/O)system at 5C and 10C to investigate the effects of HRT and carrier on nitrogen removal in wastewater at low *** results showed that the addition of the fillers improved the treatment effect of each index in the *** an optimal HRT of 7.5 h at 5C,the removal efficiencies of NHþ4-N and total nitrogen(TN)reached 91.2%and 75.6%,*** an HRT of 6 h at 10C,the removal efficiencies of NHþ4-N and TN were 96.7%and 82.9%,*** results of high-throughput sequencing showed that the addition of the suspended carriers in the aerobic zone could improve the treatment efficiency of nitrogen at low *** microbial analysis indicated that the addition of the suspended carriers enhanced the enrichment of nitrogen removal ***,Nitrotoga,and Nitrosomonas were found to be the bacteria responsible for nitrification,and their relative concentrations on the biofilm at 5C and 10C accounted for 98.11%,92.79%,and 69.98%of all biological samples,respectively.

关键词： domestic sewage Low temperature Mixed A/O process Nitrogen removal Bacterial community structure