Search Results - ZHENG ping

Anaerobic ammonium oxidation (anammox) is one of important discoveries in both environmental and microbiological fields. It supplements biogeochemistry of nitrogen cycle in nature, extends microbial diversity and urges development of novel nitrogen removal biotechnology. Recently, plenty breakthroug...

Full description

The nonlinear three-dimentional emulation of soft rock tunnel is achieved through the finite element analysis software Ansys 5.6. The deformation and creep characteristics of tunnel under engineering pressure are simulated. According to the results of emulation, the simulation of reducing pressure i...

Full description

Gas holdup and liquid circulation velocity are the mostly important hydrodynamic characters and state parameters of internal-loop airlift reactor. In this paper, the influence of gas holdup and liquid circulation velocity on the performance of the reactor is analyzed, the models of gas holdup and li...

Full description

The conversion of phosphate into phosphine was an important biological reaction with potential value in application. The swine manure was mixed with two kinds of anaerobic activated sludge at the mass ratio of 3∶1∶1 and the mixture was used as inoculum in the batch experiment. The feasibility of cel...

Full description

None

Partial nitrification of ammonia-containing wastewater can save energy and reduce cost, and has become one of the hotspots in the research of biological nitrogen removal from wastewater. The principle of partial nitrification and the merits of a new process based on that principle were analyzed, eff...

Full description

Some ferric reducing microorganisms can oxidize some contaminants to carbon dioxide using Fe (Ⅲ) as sole electron acceptor. With these microorganisms, biological-remedial technology can be developed to deal with the polluted environment in situ. In this article, the ferric microorganisms, dissimilat...

Full description

The tracer tests were performed applying pulse stimulus-response technique to an internal-loop granular sludge bed shortcut nitrifying reactor. The series number N 1.02 in the circulating section indicated that the flow pattern was similar to that of continuously stirred tank reactor (CSTR), and the...

Full description

Denitrification with ammonia as electron donor is a new microbial reaction, named anaerobic ammonia oxidation. The characteristics of mixed culture from an anaerobic ammonia oxidation reactor are compared with those of Nitrosomonas europaea and those of mixed culture from a nitrification reactor, re...

Full description

The effect of free phosphine on denitrification was investigated in the batch experiment. It was found that high phosphine concentration (0.50 mL/L and 0.97 mL/L) inhibited the conversion of nitrate when nitrate concentration was low (70 mg/L and 140 mg/L). However, the inhibition was not so obvious...

Full description

6 strains of ammonia-oxidation bacteria were isolated from an Anammox reactor, and the biological characteristics of strain N₁ were studied. The results showed that strain N₁ had the ability to oxidize ammonium anaerobically.

A technological and economical comparison between the anaerobic-adding raw wastewater-intermittent aeration (Anarwia) process and the anaerobic-Sequencing Batch Reactor (SBR) process and SBR process was carried out. The result of laboratory-and full-scale experiment showed it was not technologically...

Full description

Aerobic granular sludge with high activity and good settleability was one of the most important basis for the improvement of bioreactor performance. The mechanism of aerobic sludge granulation and its main influencing factors were analyzed. During the formation, development and maturation of aerobic...

Full description

Quantitative and qualitative analyses were conducted on the relationship between aerobic biodegradability and chemical structure of phthalic acid ester compounds by applying the quantitative structure-activity relationship (QSAR). The quantitative relationship equation between aerobic biodegradation...

Full description

This review discusses the progresses and trends in biodegradation and molecular mechanism ofchlorinated aromatic pollutants by anaerobic and aerobic microorganisms, including degradation pathway, involved enzymes and their genes, design of novel pathway, and development of highly efficient hybrid st...

Full description

The nitrogen loss in internal-loop granular sludge bed nitrifying reactor was studied, and the results indicated that ammonia escape is an important factor causing nitrogen loss. Based on double film theory and thermodynamics theory, the kinetic model for ammonia escape was constructed, and factors...

Full description

The effects of free phosphine on growth and metabolism of sulfate-reducing bacteria were investigated using batch experiment. The results show that when COD/SO₄^2- ratio was 1.0, high phosphine level had an adverse effect on sulfate reduction. The half li...

Full description

A feather-degrading fungus strain was isolated from sewage sludge on a farm for animal husbandry. After cultivated on potato sugar agar medium at 28℃ for 10 days, a colony of 3 centimeters in diameter was formed. Its hyphae were 2-3 μm in diameter with regular septa and plurinuclear. It was characte...

Full description

Ten phthalic acid esters (PAEs) were tested anaerobically to assess their potential for biogas production. Results showed that biogas production decreased with the increasing alkyl chain length of PAEs resulting in its increased half-life. The equation between net biogas production and atomic number...

Full description

Prednisone wastewater is one of the industrial wastewaters that is very difficult to be treated. Since the BOD₅/COD of the mixed prednisone wastewater was about 0.23, it was not easy to be treated biologically. After parts of the undissolved COD were removed by settlement, the...

Full description