Mic Zhao

• Wuhan University of Science and Technology

Hydrogen generation from food wastes by dry fermentation was indicated, the different TS contents (20%, 22%, 24% and 30%) of the reaction system were compared, the modified Gompertz model could be fitted for the hydrogen generation from food wastes by the dry fermentation (R²>0.97), the optimal TS content of the reaction system was found to be 22%....

Tlie effect of lipase pretreatment on kitchen grease hydrolysis and its anaerobic digestion performance were studied with batch experiments. Firstly, the influence of enzyme dosage, ratio of water to oil, pH and temperature on the kitchen grease hydrolysis were investigated. Then, the optimized pretreatment condition was determined by response surf...

In order to improve solid organics degradation rate of cassava alcohol wastewater and optimize its anaerobic fermentation characteristics, the high-efficiency cellulose degradation microbial was used as inoculum in the continuous stirred tank reactor (CSTR). The study investigates the anaerobic fermentation characteristics, enzyme activity changes...

Instability of high solid-state anaerobic digestion often happened during the long-term operation of reactor. To investigate underlying methanism of this problem, the characteristics of semi-continuous anaerobic digestion for rice straw were studied with three organic loading rates (OLR) in a horizontal reactor, when being co-inoculated with rumina...

The study compared the performance and kinetics for the generation of methane by different ratios of food waste to excess sludge at 1:0,0:1,1:1. Results showed that the co-digestion not only shortened the time of methane generation when compared to food waste alone treatment ,but also improved the production efficiency with a yield of 233.394 mL/gV...

After co-inoculation of rumen fluid with sludge, the methanogenic efficiency and anaerobic fermentation characteristics of straw which were influenced by combination of different digestate recirculation ratios and organic loading rates (OLR) at six stages, were studied in a semi-continuous reactor with solid-feeding device. The results showed that...

A pilot-scale anaerobic membrane bioreactor (AnMBR) was used to treat high-strength kitchen wastewater, and the effects of sludge retention time (SRT 20, 30, 50 days) on operational performance were multi-dimensionally investigated. The results showed that the AnMBR provided excellent operational stability at each SRT, with a constant pH of 7.2-7.8...

Methanogens were cultivated to tolerate acids by gradually increasing the concentration of butyrate in an anaerobic digestion system. Subsequently, food wastes were inoculated with the cultured sludge to evaluate the characteristics of methane generation by the high-solids fermentation model. The results indicate that the biogas and methane yields,...

A leachate treatment project using a combined CH4 lifting reactor (CLR) + an three-stage A/O-membrane bioreactor (A3/O3-MBR) process is introduced in this paper. The results showed that the process had a good leachate disposal performance. The CLR adapted well to COD loading changes and efficiently removed the organic pollutants. When the volume lo...

Two-phase and single-phase anaerobic digestion of food waste were indicated under (55±0.2)℃, the initial pH was set different during the two-phase anaerobic digestion process, and comparative research of biogas generation, organic acids, nutrients and enzyme activity was carried out. The results showed that two-phase anaerobic digestion of food was...

According to the characteristics of its water quality, a short-cut nitrification and denitrification treatment of low C/N ratio food wastewater was presented. Through 0.5 mg/L and 2.5 mg/L of DO in micro-oxygen zone and aerobic zone, and 200%, 100% and 100% reflux ratio of nitrifying liquid, micro-oxygen mixture and the sludge, the accumulation rat...

Internal circulation(IC)anaerobic treatment of landfill leachate from Tianjin Dagang Garbage Incineration Plant was investigated under condition of(35±1)℃.The reactor was operated continuously with stepwise increments in volume loading rate (VLR) until limiting condition was reached. The removal efficiency of COD, volume loading rate (VLR), biogas...

In this study, a BLR(biogas-lift reactor) anaerobic reactor with the effective volume of 1 100 m3 was used to dispose the leachate from garbage incineration plant. The anaerobic digested sludge was inoculated to the reactor and its operating temperature kept at (33±2)℃. The volume loading rate increased from 1 kg COD/(m3·d) to 10 kg COD/(m3·d) afte...

Polycaprolactone (PCL) was reshaped into cascade mini ring (CMR) served both as solid carbon source and biofilm carrier for denitrification in wastewater with low C: N ratio. Results from batch experiments showed that denitrifying microbes could easily adapt to utilize PCL with the average denitrification rate as 8.57 mg NO3-N/(L·h), and the denitr...

In order to study characteristics of anaerobic digestion with solid kitchen waste, biochemical methane potential (BMP) of the kitchen waste was evaluated by series of batch anaerobic fermentation, the performances of pH, VFA, COD and cellulose enzyme were investigated, and also methane production was fitted with the modified Gompertz model to asses...

The cultivation of anaerobic granular sludge with simulated beer wastewater in IC reactor was investigated. The relationships among EPS composition and the average particle size, cell surface hydrophobicity and Zeta potential were analyzed during the cultivation process, by which the effects of extracellular polymeric substances (EPS) on the nuclea...

Different mix ratios(VS) of food waste and excess sludge at 1:0, 2:1, 1:1, 1:2, 0:1 were indicated under the temperature of (35±0.2)°C, and the comparative study of methane potential, dehydrogenase enzyme, the concentration of F420 between these mix ratios were carried out. The results showed that the co-digestion mode could increase the stability...

The change of biogas amount, metabolites and enzyme activities were determined during the biogas production potential process from cyanobacteria of different storage times (fresh, stored for 3 months, 6 months and 9 months). The results indicated that the biogas yield reached the maximum of 120.5 mL/g TS from cyanobacteria stored for 6 months, whic...

This study focused on the volatile fatty acids (VFA) inhibition on the anaerobic digestion process and the effect of VFA on metabolic pathways from kitchen waste, according to the experiments with different material loads. The result showed that the set of 2.81 g total solid per liter obtained the best efficient of methane production (72.5 ml per g...