scholarly journals Performance of iron electrolysis for transformation of trichloroethylene in groundwater

2015 ◽  
Author(s):  
Ali Ciblak
Keyword(s):  
Iron Electrolysis

scholarly journals Long-term investigation of phosphorus removal by iron electrocoagulation in small-scale wastewater treatment plants

2018 ◽  
Vol 78 (6) ◽  
pp. 1304-1311 ◽  
Author(s):  
I. Mishima ◽  
M. Hama ◽  
Y. Tabata ◽  
J. Nakajima
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Phosphorus Release ◽  
Small Scale ◽  
Operational Conditions ◽  
Long Time ◽  
Negative Effect ◽  
Iron Electrolysis

Abstract Small-scale wastewater treatment plants (SWTPs), called Johkasou, are widely used as decentralized and individual wastewater treatment systems in sparsely populated areas in Japan. Even in SWTPs, nutrients should be removed to control eutrophication. An iron electrolysis method is effective to remove phosphorus chemically in SWTPs. However, it is necessary to determine the precise conditions under which phosphorus can be effectively and stably removed in full scale SWTPs for a long period. Therefore, long-term phosphorus removal from SWTPs was investigated and optimum operational conditions for phosphorus removal by iron electrolysis were analyzed in this study. Efficient phosphorus removal can be achieved for a long time by adjusting the amount of iron against the actual population equivalent. The change of the recirculation ratio had no negative effect on overall phosphorus removal. Phosphorus release to the bulk phase was prevented by the accumulated iron, which was supplied by iron electrolysis, resulting in stable phosphorus removal. The effect of environmental load reduction due to phosphorus removal by iron electrolysis was greater than the cost of power consumption for iron electrolysis.

Arsenic removal in synthetic ground water using iron electrolysis

2014 ◽  
Vol 122 ◽  
pp. 225-230 ◽  
Author(s):  
Lei Li ◽  
Jun Li ◽  
Chen Shao ◽  
Kejia Zhang ◽  
Shuili Yu ◽  
...  
Keyword(s):  
Ground Water ◽  
Arsenic Removal ◽  
Iron Electrolysis

Research on Waste Materials with Decentralized White Spirit Wastewater Pretreatment by Fe-C Micro-Electrolysis

2014 ◽  
Vol 644-650 ◽  
pp. 5419-5422
Author(s):  
Jin Xiang Fu ◽  
Hong Mei Li ◽  
Peng Fei Yu ◽  
Kai Zhao
Keyword(s):  
Phosphorus Removal ◽  
Ph Value ◽  
Removal Rate ◽  
Temperature Response ◽  
Brewery Wastewater ◽  
Electrochemical Test ◽  
Optimal Processing ◽  
Water Ph ◽  
Cod Removal Rate ◽  
Iron Electrolysis

This research adopts the important iron electrolysis, removal of the wastewater of high COD, SS, phosphorus pretreatment experiment. Discusses the different iron dosing quantity, iron carbon ratio, and pH value, reaction time on the COD and turbidity, the influence of the phosphorus removal effect. Studies show that iron important electrochemical test in brewery wastewater treatment static optimal processing conditions for: water pH value is 4, 5% dosage of iron filings, 60 min temperature response, COD removal rate was 52.31%. When the iron carbon ratio of 2:1, removing effect is good, can reach 54.53%.

scholarly journals Development of a Water-Purifying Facility with Iron-Electrolysis under the High-Oxygen Condition

2002 ◽  
Vol 122 (6) ◽  
pp. 665-666
Author(s):  
Toshihiko Tanada ◽  
Shinji Fujikawa ◽  
Shigeyuki Funabiki ◽  
Shinji Fukui ◽  
Masao Katsube ◽  
...  
Keyword(s):  
High Oxygen ◽  
Oxygen Condition ◽  
Iron Electrolysis

scholarly journals Improvement of phosphorus removal by calcium addition in the iron electrocoagulation process

2017 ◽  
Vol 76 (4) ◽  
pp. 920-927 ◽  
Author(s):  
I. Mishima ◽  
M. Hama ◽  
Y. Tabata ◽  
J. Nakajima
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Chemical State ◽  
Treated Wastewater ◽  
Small Scale ◽  
Calcium Addition ◽  
Ca Addition ◽  
Iron Electrolysis ◽  
Study Laboratory

Small-scale wastewater treatment plants (SWTPs) are widely used as decentralized wastewater treatment systems in sparsely populated areas of Japan. Iron electrolysis, an electrocoagulation technology, is installed in these SWTPs for phosphorus removal. Phosphorus can be removed via the formation of an insoluble compound containing phosphate and iron, such as FePO4; however, it was necessary to determine the conditions under which phosphorus can be effectively and stably removed in actual SWTPs. According to previous studies using iron compounds, improved phosphorus removal was obtained by Ca addition. It is therefore thought that calcium addition may also be effective in improving the phosphorus removal during iron electrolysis in SWTPs. It is also important to determine the chemical state of iron to understand the phosphorus removal mechanism during iron electrolysis. In this study, laboratory-scale batch experiments with the iron electrolysis method were conducted to investigate the effect of phosphorus removal using treated wastewater from actual SWTPs without or with Ca addition. The results indicated that the addition of Ca improved the phosphorus removal performance. Furthermore, phosphorus removal was inhibited in the presence of high dissolved organic carbon (DOC). The X-ray absorption fine structure measurements of the produced particulates in the experiments showed no substantial change in the chemical state of iron without or with Ca addition. The statistical analyses revealed the range of improving or inhibiting effects on phosphorus removal due to the Ca and DOC. Thus, the results of this study provided useful information pertaining to the influence of coexisting substances on phosphorus removal and the chemical state of iron in the produced particulates.

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