Biomedical subjects

Guo-wei Gu

Publications and source records attributed to Guo-wei Gu.

3 recordsLinked to original sources

PubMed2006

[Cometabolic biodegradation of nitrogenous heterocyclic compounds indole and pyridine under anoxic conditions].

Based on the traditional theory of denitrification under anoxic conditions, and with the addition of nitrate, experiments were conducted to investigate the cometabolic biodegradation of nitrogenous heterocyclic compounds-indole and pyridine. Results show that the optimum ratio of COD to nitrate (C/N) is 8.4 to approximately 8.9. Under the conditions with temperature of 28 degrees C and pH of 7.0 to approximately 7.5, the nitrate reductase activity (NRA) is in the best state. Addition of pyridine can promote NRA and the degradation of indole. When the initial concentration of indole is 150 mg/L, the concentration ratio of indole to pyridine is 1 to approximately 10, and under the optimum C/N conditions, the degradation of indole meet with zero-order kinetics. There was no accumulation of nitrite during the reaction. When the concentration ratio of pyridine to indole is less than 0.25, with the increase of pyridine concentration, there is a faster augment rate for NRA and the degradation of indole than the situation when the concentration ratio of pyridine to indole is more than 0.25.

Biodegradation, Environmental↗

PubMed2006

[Experimental research on separate structure jet aerator].

A new type of jet aerator (separate structure jet aerator) was designed and developed, and an idea of separate design was put forth. This type of jet aerator was mainly applied to the treatment of small-scale wastewater and industrial wastewater of high density treatment projects. The experimental set-up was built to investigate the influences of the structural parameters (R1, R2 and R3) on the gas suction flowrate. The experimental results are listed as follows: the gas suction flowrate fluctuates with the changes of R2, and the optimal R2 is relevant to the length of the mixing tube; R3 does not contribute a lot to the suction performance, but choosing a suitable R3 can help to make further use of the gas suction potential of the jet aerator while keeping the other parameters unchanged; R1 has a great impact on the suction performance, and the optimal R1 can be found out in the transitional region. The experiments also prove that it is feasible to apply CFD to designing jet aerator, since its gas suction flowrate is high (reaching 900 approximately 1100 L/min) and it shows prominent performance in agitating liquid.

Bioreactors↗

PubMed2003

Biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm.

A group function relation curve between flux (J) and bulk phase concentration of substrate (S) was set up. The biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm is studied (the treatment technology is coagulation/sedimentation-anoxic/aerobic biofilm process), and the results showed that the concentration of non-degradation pollutants in effluent is 77 mg/L. In aerobic zone, the half-rate constant is 72.84 mg/L, the maximum removal rate of organic compounds at unit area filler is very low, 0.089 g/(m2 x d), which corresponds to the fact that there are some biorefractory compounds in the wastewater.

Acrylic Resins↗