Ben-yi Xiao

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Non-filamentous sludge bulking occurred during sludge acclimation in lab-scale bio-reactors and the characteristics, properties and degrading pollutants capability of non-filamentous sludge were analyzed. Both low DO concentration (0 - 0.7 mg/L) and low ratio of P/BOD5 (0.78/100) resulted in excessive proliferation of viscous zoogloea and sludge bulking.(More)
Alkaline thermal treatment is an important pretreatment method for sewage sludge. In this paper, in order to optimize the alkaline thermal treatment conditions for sludge pretreatment, four pretreatment parameters ( sludge concentration, pH, temperature and treatment time) were investigated through orthogonal experiments to determine their effects on the(More)
Disintegration of alkaline treatment on excess sludge and its influencing factors were investigated. The results show that alkaline treatment can increase the soluble chemical demand oxygen (SCOD) by releasing the organic materials from cells to water and converting the insoluble ones to soluble ones. The floc structures and the cell structures of sludge(More)
The impacts of three pretreatments (acid, alkaline and thermal treatments) on the characteristics of sludge were discussed. The results showed that the three pretreatments could disintegrate the sludge and the effectiveness of alkaline treatment was the maximum (about 58.46%) and its SCOD release was also the maximum (2934.9 mg/L). The main compositions of(More)
In this study, the releases of carbon, nitrogen and phosphorus from sludge treated by microwave irradiation were investigated by batch experiments at two microwave energy inputs (MEIs), 54 kJ and 108 kJ. The final temperatures of the treated samples at these two MEIs were about 56 degrees C and 90 degrees C, respectively. Results showed that the higher MEI(More)
Hydrogen can be obtained by anaerobic fermentation of sewage sludge. Therefore, in this paper the effects of thermally pretreated temperatures on hydrogen production from sewage sludge were investigated under different pre-treatment conditions. In the thermal pretreatment, some microbial matters of sludge were converted into soluble matters from insoluble(More)
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