Zhenjiang water industry corporation

Zhenjiang, China

Zhenjiang water industry corporation

Zhenjiang, China
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Huo S.,Jiangsu University | Fan D.,Zhenjiang Water Industry Corporation | Xu L.,Jiangsu University | Wang Z.,Jiangsu University | And 3 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

After the hydrolysis acidification of vinegar fermentation wastewater, the cultivation of Chlorella sp. and nutrients removal in different concentration hydrolyzates of vinegar fermentation wastewater were investigated in the vertical tubular photobioreactor. Results showed that after the hydrolysis acidification of vinegar fermentation wastewater, the removal rates of COD, ammonia, volatile fatty acids (VFAs) and total phosphorus (TP) were all decreased to some extent. The removal rates of COD and TP were 61.8% and 63.6%, respectively. The components of VFAs were changed significantly. When the volume fraction of hydrolyzate was more than 40%, the growth rate of Chlorella sp. was inhibited. When the volume fraction of hydrolyzate was between 10% and 30%, the growth rate of Chlorella sp. was good. The concentration of Chlorella sp. cell could achieve 6.6×107 cells/mL. The growth curves of Chlorella sp. were no lag phase, after the addition of phosphate in the hydrolyzate of vinegar fermentation wastewater. After 7 d cultivation, the ammonia and total phosphorus were almost completely removed. The 96.6% COD removal was achieved after addition of some phosphate. The oil content (24%) was observed using 30% volume fraction hydrolyzate of vinegar fermentation wastewater. The contents of fatty acids C16-C18 were between 83.0% and 95.5%, which had good potential for the development for biodiesel utilization. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved.


Zhai L.Z.,Jiangsu University of Science and Technology | Sun Y.H.,Jiangsu University of Science and Technology | He C.,Zhenjiang water industry corporation
Applied Mechanics and Materials | Year: 2013

Over discharge of fluoride will cause the environment pollution and human harm. Experiments were performed with the simulated fluoride wastewater to study the removal of fluoride. The effects on the residual fluoride concentration were investigated using lime-sedimentation and coagulation/sedimentation. The results showed that the fluoride contents were among 30mg/L~50mg/L, with lime alone. The fluoride concentration decreased to 30mg/L~40mg/L, using the combination of Ca(OH)2+PAM. The residual fluoride concentrations of 600mg/L, 900mg/L, 1200mg/L fluoride wastewater remained below 10mg/L by the combination of Ca(OH)2+PAM+PAC. It suggested PAM and PAC has an important increase effect on the fluoride removal. The suitable conditions for defluoridation with Ca(OH)2+PAM+PAC: PAC was 0.2mL, fluoride-calcium ratio was 2:1.1. © (2013) Trans Tech Publications, Switzerland.


Fang J.,Chongqing University | Ren L.,Chongqing University | Liu L.,Chongqing University | Mu J.,Zhenjiang Water Industry Corporation
Chinese Journal of Environmental Engineering | Year: 2014

The degradation kinetics of COD was analyzed by studying n-phenylglycinonitrile wastewater pre-treatment using micro-electrolysis and Fenton process. Moreover, changes of COD removal rate were studied in the process of simple AC adsorption and micro-electrolysis respectively. The results showed that, initial COD degradation process by micro-electrolysis obeys approximately the pseudo-first-order reaction kinetics, and relation of COD degradation by micro-electrolysis was obtained, which explained the relationship between micro-electrolysis and activated carbon adsorption. By studying the relationship between organic matter concentration, initial concentration of hydrogen peroxide and reaction process in Fenton reaction, a reaction kinetics model was established. COD removal rate of simple AC adsorption rapidly decreased within 24 h, while micro-electrolysis reaction had small fluctuation, which can provide data experience and theoretical basis for practical applications.


Zhai L.Z.,Jiangsu University of Science and Technology | Sun Y.H.,Jiangsu University of Science and Technology | Wang T.,Jiangsu University of Science and Technology | He C.,Zhenjiang water industry corporation
Applied Mechanics and Materials | Year: 2013

Experiments were carried out with the simulated fluoride-containing wastewater to study the fluoride removal. The effects on the residual fluoride concentration were investigated using lime-sedimentation and coagulation/sedimentation. The results showed that the fluoride contents were among 30mg/L~50mg/L, with lime alone. The residual fluoride concentrations of 600mg/L, 900mg/L and 1200mg/L solution decreased to below 10mg/L, using Ca(OH)2+FeCl3+PAM. The fluoride concentrations of 300mg/L, 600mg/L, 900mg/L, 1200mg/L fluoride wastewater remained below 10mg/L by Ca(OH)2+PFS+PAM. Comparing two methods, the supernatant was relatively clear with Ca(OH)2+PFS+PAM, which had better settling performance. It suggested PFS and PAM has an important increase effect on the fluoride removal, and the optimum conditions: PFS was 0.1mL, fluoride-calcium ratio was 2:1.15. © (2013) Trans Tech Publications, Switzerland.


Wang S.-S.,Beijing University of Technology | Wang S.-S.,Zhenjiang Water Industry Company | Wang C.-X.,Beijing University of Technology | Gong Y.-K.,Beijing University of Technology | And 2 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

The production of N2O of domestic sewage with different step-feeding modes was inspected during shortcut biological nitrogen removal. Sequencing batch reactor was used in the experiment and the aeration was controlled at 60 L/h. The results show that N2O is mainly produced in the nitrification stage; the accumulation of NO2 - decreases along with the increase of steps. The N2O output increasing order with different feeding modes is as follows one-step influent, two-step influent, and three-step influent. The reason is that ammonia-oxidizing bacteria used nitrite as electron acceptors and reducing hydrogen or ammonia as electron donors for aerobic denitrification.


Hu J.,Jiangsu University | Wang H.,Tongji University | Yu Y.,Zhenjiang Water Industry Corporation | Ma L.,Tongji University | Cai L.,Jiangsu University
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | Year: 2011

According to the characteristics of catalyzed iron technology and hydrolysis & acidogenesis process, the coupling system was established to improve the biodegradability of the wastewater. The advection coupled reactor was designed and applied to the actual renovation project of wastewater treatment plant in chemical industry park. After implementation of the actual renovation project, the influent and effluent water qualities were detected and the biodegradability of the wastewater was analyzed. The treatment efficiency of hydrolysis & acidogenesis/catalyzed iron-CAST system was compared with that of the pure CAST system. The results indicate that ρ(BOD5)/ρ(COD) is improved to above 0.35 with the pretreatment of hydrolysis & acidogenesis/catalyzed iron coupling technology. The average effluent COD, ammonia nitrogen and total phosphorus of hydrolysis & acidogenesis/catalyzed iron-CAST system are 91, 17.2 and 2.39 mg·L-1 respectively, and the corresponding average removal rates increase respectively from 69%, 0 and 46% to 75%, 46% and 57%.

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