Research Of Sludge Bulking In SBR Reactor For Water Quality Influence

Activated sludge process has been open since, with its continuous improvement in technology and improvement of, at present has developed into the most widely used biological wastewater treatment technologies. But the process appeared in the phenomenon of activated sludge bulking caused by mud and water separation difficult. Activated sludge bulking filamentous bacteria are mainly sludge bulking and non-filamentous sludge bulking. Around 95% of sludge bulking filamentous bacteria are caused by excessive proliferation. Low for a comprehensive study of activated sludge bulking conditions happen, the pilot in a systematic study of low water temperature, DO concentration, pH value and other factors on the performance of activated sludge sedimentation, as well as sludge bulking phenomenon on the response system the impact of water quality, Test water using artificial separately with water and domestic wastewater for the treatment object, respectively, at low temperature, different concentration of dissolved oxygen and different influent pH values of operating conditions for the response, through experimental analysis, the following conclusions1 Low-temperature conditions, DO concentration on the sedimentation properties of activated sludge a greater impact, temperature changes in SVI Express reduced significantly. DO concentration in the reactor maintained at 2.0mg/L when the following happened to run a filamentous sludge bulking.2 Sludge Bulking happened in the three reactors, DO concentration lower the more serious sludge bulking. Medium DO concentration(1.0-2.0mg/L) of sludge bulking at the water temperature down to about 10℃when the SVI Change the value of the growth stabilized.3 At the normal pH value (pH=6.5-8.0) water conditions, in the DO concentration (1.0-2.0mg/L) operating environment in the settlement of activated sludge performance. Low DO concentrations (0.5-1.0mg/L) operating environment, the second-lowest pH value (pH=5.5-6.0) water under the conditions of activated sludge settlement properties have shown good performance; and at low pH values (pH =6.0-6.5) water under the conditions of activated sludge filamentous bacteria occurred in mildly activated sludge bulking. Happened # 2 sludge bulking activated sludge reactor SVI value at running the mid-and late changes in the rate has stabilized, with a mean of 203mL/g.4 Live in the settlement of sludge and activated sludge performance on CODcr removal efficiency between the relevance, that is, SVI increased at the same time, CODcr removal efficiency also improve.5 Happened activated sludge reactor expansion (operating conditions for low DO concentration (0.5-1.0mg/L), low pH values (pH=6.0-6.5)) water quality stability, and good removal effect of pollutants in the effluent CODcr. The average removal rate was 79%, in order to run the three highest reactor. Filamentous bacteria proliferation phase reactor greatly enhance the removal capacity of TN, the occurrence of sludge bulking filamentous activated sludge on the average TN removal efficiency reached 50%.6 Activated Sludge Bulking should not boil down to a water treatment process to run harmful phenomenon. Foregoing experiments show that the filamentous sludge bulking effect on the stability of the degradation of pollutants, and the system is running at reduced oxygen supply can be substantial amount of savings in energy consumption.