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Adsorption-filtration dual functions 1

Biochar-bentonite composite 1

Dolomite doping 1

Low-concentration phosphate 1

Phosphate adsorption 1

Polymeric matrix membrane 1

biohydrogen 1

catalytic wet oxidation process (CWO) 1

dark fermentation 1

industrial wastewaters with high concentration 1

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Research on Treatment Technology for the Industrial Wastewaters With High Concentration in China

Sun Peishi,Qian Biao,Hong Pinjie,Harada Yoshiaki,Yang Ying,Hao Yukun

Strategic Study of CAE 2003, Volume 5, Issue 6, Pages 68-73

Abstract:

By using the introduced CWO technology and its 200 L/d plant, more than 10 kinds of industrial wastewatersshowed that the CWO technology and its equipment had a good applicability for treating the industrial wastewaterssup>/d plant displayed a favorable treatment capability for the bio-degradedly difficult industrial wastewaters

Keywords： catalytic wet oxidation process (CWO) industrial wastewaters with high concentration technology process

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Facile fabrication of dolomite-doped biochar/bentonite for effective removal of phosphate from complex wastewaters

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 6, doi: 10.1007/s11783-023-1671-7

Abstract:

● Dolomite-doped biochar/bentonite was synthesized for phosphate removal.

Keywords： Biochar-bentonite composite Dolomite doping Phosphate adsorption Polymeric matrix membrane Adsorption-filtration dual functions Low-concentration phosphate

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Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

Haifa RAJHI,Daniel PUYOL,Mirna C. MARTÍNEZ,Emiliano E. DÍAZ,José L. SANZ

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3, Pages 513-521 doi: 10.1007/s11783-015-0777-y

Abstract: The successful operation of any type of hydrogen-producing bioreactor depends on the performance of the microorganisms present in the system. Both substrate and partial gas pressures are crucial factors affecting dark fermentation metabolic pathways. The main objective of this study was to evaluate the impact of both factors on hydrogen production using anaerobic granular sludge as inoculum and, secondly, to study the metabolic shifts of an anaerobic community subjected to low partial gas pressures. With this goal in mind, seven different wastewater (four synthetic media, two industrial wastewater, and one domestic effluent) and the effect of applying vacuum on the systems were analyzed. The application of vacuum promoted an increase in the diversity of hydrogen-producing bacteria, such as , and promoted the dominance of acetoclastic- over hydrogenotrophic methanogens. The application of different media promoted a wide variety of metabolic pathways. Nevertheless, reduction of the hydrogen partial pressure by application of vacuum lead to further oxidation of reaction intermediates irrespective of the medium used, which resulted in higher hydrogen and methane production, and improved the COD removal. Interestingly, vacuum greatly promoted biogenic hydrogen production from a real wastewater, which opens possibilities for future application of dark fermentation systems to enhance biohydrogen yields.

Keywords： dark fermentation biohydrogen wastewaters vacuum