共 41 条
Performance prediction of suspension freeze crystallization for the treatment of liquid hazardous wastes via machine learning methods
被引:10
作者:
Yuan, Wei
[1
]
Lv, Wenjie
[1
]
Wang, Hualin
[1
]
Li, Shouzhuang
[2
]
Ma, Hongpeng
[1
]
机构:
[1] East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, 130 Meilong Rd, Shanghai 200237, Peoples R China
[2] Aalto Univ, Dept Mech Engn, Sch Engn, Sahkomiehentie 4J, Espoo 02150, Finland
关键词:
Liquid hazardous waste;
Suspension freeze crystallization;
Machine learning;
Artificial neural network;
Random forest;
ARTIFICIAL NEURAL-NETWORKS;
RANDOM FOREST;
WATER;
RECOVERY;
MODEL;
REMOVAL;
DESIGN;
ANN;
D O I:
10.1016/j.jclepro.2021.129629
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
The experimental method for determining treatment efficiency of suspension freeze crystallization (SFC) on liquid hazardous wastes (LHWs) is accurate but complex, costly and time-consuming. In the present study, artificial neural works (ANN) and random forest (RF), two machine learning methods, were utilized to develop models that were capable of predicting the treatment performance of SFC based on 8 typical LHWs. The targeted solutes in the chosen LHWs were characterized by COD, TOC, TDS, sulfide, conductivity, etc. The models were induced and tested to predict solute removal efficiency in accordance with freezing conditions and solution characteristics of 328 pieces of data collected from previous publications. Although both models have comparable predictive power, RF model presented better prediction accuracy and power (R2 = 0.9811, RMSE = 0.0323) than ANN model (R2 = 0.9615, RMSE = 0.0481). At the same time, the RF models showed better generalization ability than ANN models regardless different LHWs. The variable importance measurement indicated that ice phase fraction was the most important factor for solute removal efficiency in SFC process. The accurate predictability of developed models could be used before actual experiment to predict the removal efficiency of SFC according to various independent variables, so as to significantly reduce experiment workload of searching for the optimum freezing conditions. The variable importance measurement could provide a right direction for adjust the higher treatment efficiency of SFC on LHWs in the real situation.
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页数:9
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