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Highlights ► Simultaneous hydrogen production and acidogenesis using fresh compost leachate as nutrient source. ► Carbonate addition improve both the hydrogen production and acidogenesis performance. ► pH 9 is the optimal condition for both processes. ► Using leachate as nutrient source...
Highlights ► Water-washed process was employed as the pre-treatment of spent activated carbon. ► The carbon content and heating value were significantly increased. ► The derived fuel with water-washed spent activated carbon could reduce NO x emission. ► The turning spent activated carbon...
Highlights ► This is the first study evaluating biological treatment of TMAH in a full-scale WWTP. ► Methanogenic conditions would be favored over the aerobic ones for TMAH treatment. ► Methanomethylovorans hollandica and Methanosarcina mazei are major TMAH-degraders.
Highlights ► A continuous transesterification with a high conversion implemented in a fixed bed reactor. ► D261 anion exchange resin as catalyst with high catalytic activity for transesterification. ► An in - situ regeneration procedure of the anion exchange resin as catalyst was adopted....
In this study, the influence of organic loading rate (OLR) on the performance of a membrane bio-reactor (MBR) was investigated. The MBR was operated with 6 different OLRs between 0.5 and 3.0 kg COD/m 3 d. The hydrodynamic parameters of the MBR were kept constant. The hydraulic retention time and...
Highlights ► Sponge carriers in MB-MBR resulted in prolong filtration as compared to C-MBR. ► Higher fouling resistances in C-MBR responsible for higher membrane fouling rates. ► Excessive filamentous bacteria in C-MBR responsible for low permeability. ► Higher soluble EPS excretion major...
Uncertainty information is essential for the proper use of life cycle assessment and environmental assessments in decision making. To investigate the uncertainties of biodiesel and determine the level of confidence in the assertion that biodiesel is more environmentally friendly than diesel, an...
The effect of ammonia-N accumulation in a dry anaerobic digestion was studied effectively using pilot-scale thermophilic reactor. Two simulations were prepared to attain C/N ratio 27 and C/N ratio 32 using bio-degradable feedstocks such as food waste, fruit and vegetable waste, green waste and...
Highlights ► Kinetic studies of continuous esterification applied for three scales of fixed bed reactors. ► The FFA conversion along with the fixed bed height was presented by a kinetic model. ► This kinetic model also shows good applicability with different kinds of resins.
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