Removal of organic compounds from shale gas fracturing flowback water by an integrated electrocoagulation and electro-peroxone process

Electrochemical conditioning of recycled flotation wastewater for flotation results improving

“…The process is fast in the initial 5-10 min and further, with the time increase, the removal increases slowly. A similar course of the process was observed by other authors [31,34,50] although sometimes in considerably longer time, as found by Wu at al. [31].…”

“…when the main process was electrocoagulation. Similar effect was observed by Zhang and co-authors [50]. They found that TOC removal from fracturing flowback water, achieved by EC, is significantly higher compared to EO (with Pt anode).…”

Shale gas fracturing flowback water deep treatment engineering – a case study

“…18 The treatment methods for SG-FFF to remove dissolved salts include coagulation, ultrafiltration, nanofiltration, 19 membrane distillation, 20 vapor compression evaporation (MVR), 15 reverse osmosis (RO) membrane concentration, 21 ozone pre-oxidation and gravity driven membrane filtration. 22,23 The treatment methods for SG-FFF to remove organic matter include thermally activated persulfate, 1,7,24 an anoxic/oxic membrane bioreactor (A/O-MBR) mediated by nano-iron, 25 zero-valent iron and persulfate synergistic ozone, 26 microbial fuel cells, 27,28 electrocoagulation combined with ozone, 29,30 electrofenton, 31,32 carbon nanotube embedded diatomite adsorbent adsorption, 33 aerosol adsorption, 34 ozone-coupled activated carbon adsorption and aerobic, 35 the aerobic granular sludge method, 36 the ozone-coupled moving bed biofilm method 37 and pre-oxidation coupled with the biological method. 38 The combined processes to treat SG-FFF for discharge include coagulation, precipitation, adsorption, ultrafiltration and RO, 39 ozone, ultrafiltration and RO, 40 and gravity driven membrane filtration combined with granular activated carbon (GAC) adsorption, and solar aeration.…”

Typical organic fouling in the electrodialysis concentration/desalination process of shale gas fracturing flowback water

“…19 Lots of research have been carried out on the treatment of shale gas FFW. The main methods include oxidation, 20 flocculation sedimentation, 21 electrochemical methods, 22 biological methods, 23 membrane methods, [24][25][26][27][28] etc. Membrane processes play a leading role due to their low energy consumption and high efficiency.…”