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Evaluation of the k-nearest neighbor method for forecasting the influent characteristics of wastewater

Minsoo KIM,Yejin KIM,Hyosoo KIM,Wenhua PIAO,Changwon KIM

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 299-310 doi: 10.1007/s11783-015-0825-7

Abstract: The k-nearest neighbor (k-NN) method was evaluated to predict the influent flow rate and four water qualitiesThe influent flow rate was accurately predicted within one standard deviation of measured values.Influent water qualities were well predicted with the mean absolute percentage error (MAPE) under bothOverall, the k-NN method was verified to be useful for predicting WWTP influent characteristics.

Keywords: influent wastewater     prediction     data-driven model     k-nearest neighbor method (k-NN)    

Characteristic and correlation analysis of influent and energy consumption of wastewater treatment plants

Luxi Zou, Huaibo Li, Shuo Wang, Kaikai Zheng, Yan Wang, Guocheng Du, Ji Li

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 6, doi: 10.1007/s11783-019-1167-7

Abstract: Poor biodegradability and insufficient carbon source are discovered from influent.Influent indices presented positively normal distribution or skewed distribution.Energy consumption increases with the increase in influent volume and COD reduction.The influent BOD5/COD was 0.4%–0.6%, only 39.2% SS/BOD5 exceeded the standard by 36.3%, the average BOD5/TN was 3.82, and the probability of influent BOD5/TP>20 was 82.8%.

Keywords: Taihu Basin     Wastewater treatment plant     Influent characteristics     Energy consumption evaluation     Specific    

Distribution, characteristics and daily fluctuations of microplastics throughout wastewater treatment

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1,   Pages 6-6 doi: 10.1007/s11783-021-1440-4

Abstract:

• MPs were analyzed throughout three WWTPs with mixed domestic–industrial influents.

Keywords: Microplastic     Wastewater treatment plant     Mixed domestic-industrial influent     Characteristic     Daily fluctuation    

Influence of influent on anaerobic ammonium oxidation in an Expanded Granular Sludge Bed-Biological Aerated

Daijun ZHANG, Cui BAI, Ting TANG, Qing YANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 291-297 doi: 10.1007/s11783-010-0270-6

Abstract: (COD) of 300–1200 mg·L and of 30–120 mg·L at the outer recycle ratio of 200%, the influence of influentcaused an increase in denitrification and methanogenesis but a decrease in ANAMMOX; however, when an influentHigher influent concentration favored ANAMMOX when the COD concentration of influent was fixed.methanogenesis could be dynamically maintained in the sludge of EGSB reactor for a certain range of influent

Keywords: Expanded Granular Sludge Bed-Biological Aerated Filter (EGSB-BAF) integrated system     the influence of influent    

Short-term prediction of the influent quantity time series of wastewater treatment plant based on a chaos

LI Xiaodong, ZENG Guangming, HUANG Guohe, LI Jianbing, JIANG Ru

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 3,   Pages 334-338 doi: 10.1007/s11783-007-0057-6

Abstract: By predicting influent quantity, a wastewater treatment plant (WWTP) can be well controlled.The nonlinear dynamic characteristic of WWTP influent quantity time series was analyzed, with the assumptionBased on this, a short-term forecasting chaos neural network model of WWTP influent quantity was built

Keywords: nonlinear     reconstruction     WWTP influent     characteristic     Reasonable forecasting    

Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment

Shuai MA, Siyu ZENG, Xin DONG, Jining CHEN, Gustaf OLSSON

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 128-136 doi: 10.1007/s11783-013-0598-9

Abstract: The prediction of the influent load is of great importance for the improvement of the control systemanalysis method is presented in this paper in order to estimate and predict the periodicity of the influent

Keywords: influent load prediction     wavelet de-noising     power spectrum density     autoregressive model     time-frequency    

Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for nitrogen removal

ZENG Wei, PENG Yongzhen, WANG Shuying

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 28-32 doi: 10.1007/s11783-007-0005-5

Abstract: Under sufficient influent alkalinity, the AAA process did not have an advantage over one aerobicanoxicUnder deficient influent alkalinity, when compared to OAA, the AAA process improved treatment efficiencyIf the lack of alkalinity in the influent was less than 1/3 of that needed, there is no need for externalalkalinity addition and treatment efficiency was the same as that under sufficient influent alkalinityEven if the lack of alkalinity in the influent was more than 1/3 of that needed, the AAA process was

Keywords: bicarbonate alkalinity     sufficient influent     influent alkalinity     detection     alkalinity production    

Nitrate removal to its fate in wetland mesocosm filled with sponge iron: Impact of influent COD/N ratio

Zhihao Si, Xinshan Song, Xin Cao, Yuhui Wang, Yifei Wang, Yufeng Zhao, Xiaoyan Ge, Awet Arefe Tesfahunegn

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1183-7

Abstract: An increase of the influent COD/N ratio resulted in lower chemical denitrification and higher bio-denitrificationThis study provides a valuable method and an improved understanding of NO3‒-N reduction characteristics

Keywords: Sponge iron     Wetland mesocosm     Electronic donor     Denitrification     COD/N ratio    

Recent progress in hydrodynamic characteristics research and application of annular centrifugal extractors

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 854-873 doi: 10.1007/s11705-022-2156-0

Abstract: Hence, this paper reviews research progress regarding ACE in terms of hydrodynamic characteristics and

Keywords: annular centrifugal extractor     hydrodynamic characteristics     structure optimization     the latest application    

Clinical characteristics and outcomes of biopsy-proven diabetic nephropathy

Li Zhuo, Nianrong Zhang, Guming Zou, Dapeng Chen, Wenge Li

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 386-392 doi: 10.1007/s11684-017-0574-z

Abstract: In conclusion, the clinical characteristics of DN vary, and renal biopsy is necessary to determine renal

Keywords: diabetic nephropathy     clinical characteristics     renal biopsy     outcomes    

Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Frontiers of Medicine 2015, Volume 9, Issue 2,   Pages 129-133 doi: 10.1007/s11684-015-0387-x

Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 241-246 doi: 10.1007/s11783-008-0040-x

Abstract: chemical oxygen demand (COD), acetic acid and pH of the effluent were monitored at different loadings and influentThe results showed that the anaerobic reactor could be operated steadily at as low as 119 mg/L of influent

Keywords: homogeneous     spherical     influent alkalinity     process     anaerobic treatment    

Obesity-related glomerulopathy: pathogenesis, pathologic, clinical characteristics and treatment

Tianhua Xu, Zitong Sheng, Li Yao

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 340-348 doi: 10.1007/s11684-017-0570-3

Abstract:

In light of the rapid increase in the number of obesity incidences worldwide, obesity has become an independent risk factor for chronic kidney disease. Obesity-related glomerulopathy (ORG) is characterized by glomerulomegaly in the presence or absence of focal and segmental glomerulosclerosis lesions. IgM and complement 3 (C3) nonspecifically deposit in lesions without immune-complex-type deposits during ORG immunofluorescence. ORG-associated glomerulomegaly and focal and segmental glomerulosclerosis can superimpose on other renal pathologies. The mechanisms under ORG are complex, especially hemodynamic changes, inflammation, oxidative stress, apoptosis, and reduced functioning nephrons. These mechanisms synergize with obesity to induce end-stage renal disease. A slow increase of subnephrotic proteinuria (<3.5 g/d) is the most common clinical manifestation of ORG. Several treatment methods for ORG have been developed. Of these methods, renin–angiotensin–aldosterone system blockade and weight loss are proven effective. Targeting mitochondria may offer a novel strategy for ORG therapy. Nevertheless, more research is needed to further understand ORG.

Keywords: obesity-related glomerulopathy     pathogenesis     pathologic     clinical characteristics    

Dynamic characteristics of molten droplets and hot particles falling in liquid pool

Liangxing LI, Weimin MA, Huixiong LI, Tingkuan CHEN,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 246-251 doi: 10.1007/s11708-009-0077-y

Abstract: The dynamic characteristics of molten droplets and hot particles at the very beginning of their fall

Keywords: dynamic characteristics     molten droplets     high-temperature particles     fuel and coolant interactions    

Combustion characteristics and kinetics of bio-oil

Ruixia ZHANG, Zhaoping ZHONG, Yaji HUANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 119-124 doi: 10.1007/s11705-009-0068-x

Abstract: The combustion characteristics of bio-oils derived from rice husk and corn were studied by thermogravimetrythermal analysis (DTA) curves of bio-oils in air and nitrogen atmosphere, we analyzed the combustion characteristics

Keywords: bio-oil     combustion characteristics     combustion kinetics    

Title Author Date Type Operation

Evaluation of the k-nearest neighbor method for forecasting the influent characteristics of wastewater

Minsoo KIM,Yejin KIM,Hyosoo KIM,Wenhua PIAO,Changwon KIM

Journal Article

Characteristic and correlation analysis of influent and energy consumption of wastewater treatment plants

Luxi Zou, Huaibo Li, Shuo Wang, Kaikai Zheng, Yan Wang, Guocheng Du, Ji Li

Journal Article

Distribution, characteristics and daily fluctuations of microplastics throughout wastewater treatment

Journal Article

Influence of influent on anaerobic ammonium oxidation in an Expanded Granular Sludge Bed-Biological Aerated

Daijun ZHANG, Cui BAI, Ting TANG, Qing YANG

Journal Article

Short-term prediction of the influent quantity time series of wastewater treatment plant based on a chaos

LI Xiaodong, ZENG Guangming, HUANG Guohe, LI Jianbing, JIANG Ru

Journal Article

Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment

Shuai MA, Siyu ZENG, Xin DONG, Jining CHEN, Gustaf OLSSON

Journal Article

Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for nitrogen removal

ZENG Wei, PENG Yongzhen, WANG Shuying

Journal Article

Nitrate removal to its fate in wetland mesocosm filled with sponge iron: Impact of influent COD/N ratio

Zhihao Si, Xinshan Song, Xin Cao, Yuhui Wang, Yifei Wang, Yufeng Zhao, Xiaoyan Ge, Awet Arefe Tesfahunegn

Journal Article

Recent progress in hydrodynamic characteristics research and application of annular centrifugal extractors

Journal Article

Clinical characteristics and outcomes of biopsy-proven diabetic nephropathy

Li Zhuo, Nianrong Zhang, Guming Zou, Dapeng Chen, Wenge Li

Journal Article

Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Journal Article

Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Journal Article

Obesity-related glomerulopathy: pathogenesis, pathologic, clinical characteristics and treatment

Tianhua Xu, Zitong Sheng, Li Yao

Journal Article

Dynamic characteristics of molten droplets and hot particles falling in liquid pool

Liangxing LI, Weimin MA, Huixiong LI, Tingkuan CHEN,

Journal Article

Combustion characteristics and kinetics of bio-oil

Ruixia ZHANG, Zhaoping ZHONG, Yaji HUANG

Journal Article