[Influence of different recovery methods on the activity of nitrification granular sludge].

Aerobic nitrifying granule sludge cultivated in sequential batch reactor (SBR) was used to investigate the critical activity point of granules and the effect of different ammonia concentration and aeration time on reactivation after storage. The results showed that there was big difference in the activity (SOUR, 02/VSS) of nitrifying bacteria after different storage time. The specific oxygen utilization rate (SOUR) of granules before storage was 13.

Simultaneous energy recovery and autotrophic nitrogen removal from sewage at moderately low temperatures.

This study assessed the technical feasibility of treating sewage with a combination of direct anaerobic treatment and autotrophic nitrogen removal, while simultaneously achieving energy recovery and nitrogen removal under moderately low temperatures. The concentrations of ammonia, nitrite, and COD in effluent were below 1, 0.1, and 30 mg/L, respectively.

[A novel municipal wastewater treating process for energy production and autotrophic nitrogen removal based on ANAMMOX].

Using a innovative system consisted of methanogenesis,partial nitritation and anaerobic ammonium oxidation (ANAMMOX) reactors, simultaneous methane production and autotrophic nitrogen removal from domestic sewage was successfully achieved. The results showed that the effluent NH4(+) -N of the combined treatment process was below the detection limit. The effluent NO3(-)-N and NO2(-) -N were less than 0.

[Risk factors of ventilator-associated pulmonary Candida infection and drug-resistant analysis].

Objective: To investigate the risk factors for pulmonary Candida infection in association with mechanical ventilation and analyze the drug resistance profile of the Candida species that cause the infection.

Methods: A retrospective analysis was conducted 114 patients receiving mechanical ventilation for over 48 h. According to the presence of pulmonary Candida infections, these patients were divided into infected group (n=50, 43.