Wang X.G.,Shandong Normal University |
Ren Z.M.,Shandong Normal University |
Ma Z.Y.,Jinan Water and Wastewater Monitoring Center
Applied Mechanics and Materials | Year: 2014
A new bio-optoelectronic system, which included the behavior (aquatic organism) monitoring system and the water physiochemical factor monitoring system, was developed for the purpose of the management of accidental pollution events in water resource in Ji'nan, China. The system included a monitoring center and three monitoring stations. Communication between the monitoring stations and the monitoring center was mainly by the General Packet Radio Service network transmission complemented by a dial-up connection for use when this service was unavailable. The results suggested that once an accidental pollution occurred, the system would make a comprehensive evaluation based on the Self-Organising Map analysis on the monitoring data and some decision would be made based on the Emergency Management of Accidental Pollution. As a result, the new bio-optoelectronic system provided an effective approach on the management of accidental pollution events in drinking water supply. © (2014) Trans Tech Publications, Switzerland.
Wu J.S.,Shandong Jianzhu University |
Jia R.B.,Jinan Water and Wastewater Monitoring Center |
Li B.,Shandong Jianzhu University |
Liu C.C.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2014
In this paper, the Chlorella vulgaris in Yellow River Diversion reservoir was selected as experimental subjects to cultivate in laboratory. The the relationship between algae biomass and N,P was studied from the following aspects：the type of nitrogen source, the concentration of N and P, and the ratio of N and P. It was found that KNO3was one of the best nitrogen source for growth of Chlorella vulgaris. Chlorella vulgaris can live at the lower N concentration, while it was very difficult to survive in the absence of P. So P is the limiting factor for its growth. In addition, the optimum ratio of nitrogen to phosphorus was 16:1, for Chlorella vulgaris’s growth. It was similar to the algae outbreak in the water eutrophication, glycine as the Chlorella nutrition, the algae grew slow at early and later rapid. © (2014) Trans Tech Publications, Switzerland.
Sun W.,Shandong University |
Jia R.,Jinan Water and Wastewater Monitoring Center |
Gao B.,Shandong University
Frontiers of Environmental Science and Engineering in China | Year: 2012
In this paper, a method using solid-phase extraction (SPE) and gas chromatography-mass spectrometry (GC-MS) was developed to simultaneously analyze five taste and odor compounds in surface water, i. e., 2-methylisoborneol (2-MIB), 2,4,6-trichloroanisole (TCA), 2-isopropyl-3-methoxy pyrazine (IPMP), 2-isobutyl-3-methoxy pyrazine (IBMP), and trans-1,10-dimethyl-trans-9-decalol (geosmin, GSM). The mass spectrometry was operated in selective ion monitoring (SIM) mode. Three kinds of SPE columns and three eluting solvents were compared, the C18 column was chosen as optimum SPE column, and methanol was chosen as the optimum eluting solvent. It was found that the method showed good linearity in the range of 1-200 ng·L -1 and gave detection limits of 0.5-1.5 ng·L -1 for individual compounds. Good recoveries (93.5%-108%) and relative standard deviations (1.58%-7.31%) were also obtained. Additionally, concentrations of these taste and odor compounds in Jinan's surface and drinking water were analyzed by applying this method, and the results showed that GSM and 2-MIB were the dominant taste and odor compounds in Jinan's raw water. © 2010 Higher Education Press and Springer-Verlag Berlin Heidelberg.
Chen L.,Shandong University |
Jia R.-B.,Jinan Water and Wastewater Monitoring Center |
Li L.,Shandong University
Environmental Sciences: Processes and Impacts | Year: 2013
Bacteria in drinking water distribution systems can cause deterioration of the water quality, and the microbial quality of tap water is closely related to consumer health. In the present study, the potential effects of bacteria attached to cast iron pipes on tap water in a distribution system were investigated. Comparison of the bacterial community composition of pipe tubercles with that of stagnant tap water samples based on a denaturing gradient gel electrophoresis analysis of the 16S rRNA gene revealed that the communities were related. Specifically, the main bacterial members were identical to each other. The bacterial community was found to be dominated by Firmicutes, Actinobacteria, and Proteobacteria, which included Rhizobium, Pseudomonas, Lactococcus, Brevundimonas, Rheinheimera, Arthrobacter, Bacillus, and Herbaspirillum. Heterotrophic bacteria proliferation was observed during the period of stagnation, followed by a decrease of assimilable organic carbon and a slight increase of microbially available phosphorus. These findings indicated that the regrowth of bacteria might be boosted by the release of nutrients such as phosphorus from the pipe walls, as well as the decline of residual chlorine during stagnation. Inorganic contaminants at low levels, including Al, Mn, Zn, Pb, Cr, Cu, and Ni, were detected in tubercles and were concentrated in particulates from tap water following the release of iron during stagnation. © 2013 The Royal Society of Chemistry.
Zhao S.,Shandong University |
Gao B.,Shandong University |
Yue Q.,Shandong University |
Sun S.,Shandong University |
And 2 more authors.
Journal of Hazardous Materials | Year: 2015
Enteromorpha polysaccharides (Ep) were used as a new coagulant aid together with polyaluminum chloride (PACl) in coagulation-ultrafiltration process to purify Yellow River water. The evolution of flocs size, growth rate, strength, recoverability and fractal structure due to Ep addition were systematically studied in this paper. On this basis, membrane fouling caused by the coagulation effluents of PACl and Ep were also investigated. Results indicated that Ep addition lead to 20% increase in coagulation performance, and meanwhile generate flocs with bigger sizes, faster growth rates and higher recovery abilities. Additionally, the flocs formed by PACl presented more compact structure with a larger Df value, while much looser flocs were obtained when Ep was added. Results of ultrafiltration experiments implied that with Ep addition, membrane fouling could be significantly reduced due to large size and loosely structures of flocs in coagulation effluents. Considering both the coagulation efficiency and ultrafiltration membrane performance, 0.2mg/L Ep was determined as the optimal dosage in coagulation-ultrafiltration process in this study. © 2014 Elsevier B.V.