Lianyungang Water Supply Co.

Xinpu, China

Lianyungang Water Supply Co.

Xinpu, China

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Tian C.,CAS Research Center for Eco Environmental Sciences | Tian C.,China Academy of Urban Planning and Design | Liu F.,CAS Research Center for Eco Environmental Sciences | Bai Y.,CAS Research Center for Eco Environmental Sciences | And 4 more authors.
Desalination and Water Treatment | Year: 2016

This plant-scale investigation compared two process improvement strategies for Lianyungang drinking water treatment plant (L-DWTP), a typical plant employing conventional processes to treat source water impacted by seasonal non-point pollution. Hierarchical cluster analysis grouped it into two clusters, i.e. normal period and polluted period. Originally, the L-DWTP exhibited poor organic matter removal efficiency, and 76.7% of the effluent permanganate index (CODMn) levels exceeded the state regulation requirement (<3 mg/L). In addition, chloroform concentration was observed to exceed the regulation requirement (60 μg/L) by 14.2 and 56.2% in normal and polluted periods. The combined use of FeCl3 and KMnO4 (Fe–Mn enhanced coagulation) increased the CODMn removal efficiency by 10.6%, and decreased the chloroform formation by 26.4%. It indicates that about 94.5% of effluent CODMn values and nearly all of chloroform levels may meet the standard in normal period. However, Fe–Mn enhanced coagulation shows limitation in polluted period. The advanced treatment by ozone-biological activated carbon process (O3-BAC) increases the CODMn removal efficiency by 29.5%, and decreases the chloroform formation by 43%, indicating that effluent levels may meet the standard both in normal and polluted periods. Cost was also compared, and the extra cost for Fe–Mn enhanced coagulation is only about 20% of that for O3-BAC. In conclusion, O3-BAC works well both in normal and polluted periods. Fe–Mn enhanced coagulation only shows good performance in normal period, but is more economical. Therefore, it is proposed to use Fe–Mn enhanced coagulation in normal period, while O3-BAC during polluted period. These obtained plant-scale data are valuable to optimize the operation of DWTPs with similar challenges. © 2015 Balaban Desalination Publications. All rights reserved.


Zhang S.,CAS Northwest Institute of Plateau Biology | Zhang S.,Qufu Normal University | Zhang S.,University of Chinese Academy of Sciences | Yu Z.,Lianyungang Water Supply Co. | And 6 more authors.
Food Control | Year: 2014

A new and sensitive pre-column derivatization method was developed for the analysis of melamine leached from tableware by high performance liquid chromatography (HPLC) with fluorescence detection. The HPLC sensitivity was greatly enhanced by introducing 10-methyl-acridone-2-sulfonyl chloride (MASC) with excellent fluorescence property into the melamine molecule. Meanwhile, derivatization also greatly increased the hydrophobicity of melamine. Therefore, the common reversed phase column can be used for the HPLC analysis of highly hydrophilic melamine. The detection limit obtained by the proposed method was lower than 0.40μg/L. This is the first time that HPLC with fluorescence detection was applied to the analysis of melamine. The proposed method was successfully applied to the analysis of melamine leached from tableware. The results indicated that the leaching of melamine from tableware was obvious when hot water or milk was added. © 2013 Elsevier Ltd.


Tian C.,CAS Research Center for Eco Environmental Sciences | Tian C.,China Academy of Urban Planning & Design | Liu F.,CAS Research Center for Eco Environmental Sciences | Bai Y.,CAS Research Center for Eco Environmental Sciences | And 4 more authors.
Desalination and Water Treatment | Year: 2015

This plant-scale investigation compared two process improvement strategies for Lianyungang drinking water treatment plant (L-DWTP), a typical plant employing conventional processes to treat source water impacted by seasonal non-point pollution. Hierarchical cluster analysis grouped it into two clusters, i.e. normal period and polluted period. Originally, the L-DWTP exhibited poor organic matter removal efficiency, and 76.7% of the effluent permanganate index (CODMn) levels exceeded the state regulation requirement (<3 mg/L). In addition, chloroform concentration was observed to exceed the regulation requirement (60 μg/L) by 14.2 and 56.2% in normal and polluted periods. The combined use of FeCl3 and KMnO4 (Fe–Mn enhanced coagulation) increased the CODMn removal efficiency by 10.6%, and decreased the chloroform formation by 26.4%. It indicates that about 94.5% of effluent CODMn values and nearly all of chloroform levels may meet the standard in normal period. However, Fe–Mn enhanced coagulation shows limitation in polluted period. The advanced treatment by ozone-biological activated carbon process (O3-BAC) increases the CODMn removal efficiency by 29.5%, and decreases the chloroform formation by 43%, indicating that effluent levels may meet the standard both in normal and polluted periods. Cost was also compared, and the extra cost for Fe–Mn enhanced coagulation is only about 20% of that for O3-BAC. In conclusion, O3-BAC works well both in normal and polluted periods. Fe–Mn enhanced coagulation only shows good performance in normal period, but is more economical. Therefore, it is proposed to use Fe–Mn enhanced coagulation in normal period, while O3-BAC during polluted period. These obtained plant-scale data are valuable to optimize the operation of DWTPs with similar challenges. © 2015 Balaban Desalination Publications. All rights reserved.


Chen X.-C.,CAS Research Center for Eco Environmental Sciences | Luo Q.,CAS Research Center for Eco Environmental Sciences | Chen H.,Lianyungang Water Supply Co. | Wei Z.,CAS Research Center for Eco Environmental Sciences | And 2 more authors.
Huanjing Kexue/Environmental Science | Year: 2013

A series of experiments were conducted to study the occurrence and distribution of volatile organic compounds (VOCs) in conventional and advanced drinking water treatment processes of 3 water treatment plants in Lianyungang City. Results showed that 30 compounds of 3 classes were detected from 67 kinds of VOCs in all the samples collected. The concentrations of carbonyl compounds, halogenated hydrocarbons and benzenes detected were in the ranges of 0.04-61.27, 0.02-35.61 and 0.07-2.33 μg·L-1, respectively. Comparing the changes of different VOCs in three drinking water treatment plants, conventional chlorination process could effectively remove benzenes but meanwhile produced trihalomethanes (THMs). Additional advanced treatment ozonation-biological activated carbon process could decrease the formation of THMs during pre-chlorination but produced new risky contaminants like carbonyl compounds. The changes of VOCs in tap water were also investigated. It was found that carbonyl compounds produced by ozonation could be further transformed to THMs with residual chlorine. However, the health risks of all detected compounds in tap water were at a low level, except that the carcinogenic risk of crotonaldehydes (9.3×10-5-2.2×10-4) was slightly higher than the US EPA threshold (10-6-10-4).

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