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The acidification and restoration process during the start-up of anaerobic baffled reactor (ABR) investigated. The results showed that the main reason for acidification was the much low of alkalinity. Once acidification occurred, the reactor could be restored by increasing the alkalinity of the influent. In the various stages of acidification and restoration, the removal rate and contribution rate...
A new method of microorganism acclimation for biological treatment of high-salinity oilfield wastewater was proposed, in which the salinity was increased in logarithmic mode, while in the traditional method the salinity was mainly increased in proportion. A contrast experiments was made between new method and the traditional method. The quality of the influent is as follow: salt content was ranged...
Considerable wastewater from corn starch processing contains lots of organic matter, which is difficulty to treat and causes serious pollution. As the starch processing industry continues to expand, more and more concern focuses on water pollution. In this study, when membrane Biological Reactor treats wastewater from corn starch processing, the influent volume 3 loads up to 20 ~ 50kg COD/(m3 day),...
Abstract- The nitrogen removal effect of catching bed biofilm reactor based on traditional biofilm process was investigate. The result indicates, steady removal effect with 87.81% of average COD removal rate was achieved in various dissolved oxygen(DO) concentrations.When DO was between 0.7~1.1 mg/L, removal rate for NH4+-N and TN 94.7% ,53.8%,respectively.When DO was controlled in 1.2~2.0 mg/L, 94...
To investigate the possibility of the rapidly starting of the SBR reactor, the start-up effect of aerobic granular sludge cultivated with and without nuclei were compared at low temperature. In the reactor which added aerobic denitrification biofilm debris as nuclei, aerobic granular formed after 30 days of operation at 20°C, the average diameter of granular achieved 7.8mm, MLSS was above 12.275g/L,...
Biofilm performance at various bed expansion ratios was investigated in an aerobic biofilm fluidized bed. As the bed expansion was increased from 20 to 35%, bioparticle collision resulted in the decrease of biofilm thickness. However, shear stress became the dominant factor that resulted in the gradual decrease of biofilm thickness at high expansion ratios ranging from 65% to 90%. In general, biofilm...
Molasses alcohol wastewater was treated by the micro-aerobic hydrolysis and acidification process as a pretreatment process. The COD removal rate increased quickly at the beginning of the reaction and then very slowly. The COD removal rate and the acidification rate reached the maximum at the aeration rate of 20mL/min. The acidification rates at different pH values increased firstly with the increasing...
Anaerobic biological technology has been widely applied in the treatment of low-concentration organic water recently. However, there are no successful engineering cases of using anaerobic reactors to treat municipal wastewater because of its low efficiency. This paper puts forward the technological process of using unequal spaced opposite floded plate Reactor to treat municipal wastewater. Through...
Monosodium glutamate (MSG) wastewater is a very refractory case of high strength organic wastewater. To investigate the effect of operating variables on treatment of MSG wastewater, a laboratory scale study was conducted. The treatment of MSG wastewater was studied in a continuous flow anaerobic fluidized blanket (UASB) reactor. The effect of operating variables such as organic volumetric load rate...
As a kind of high efficient equipment of waster treatment, Up-flow Anaerobic sludge Blanket(UASB)has many advantages, such as effluent quality, steady operation, broad application on treatment high concentration organic wasters. Due to the high COD consistency of the wastewater from starch production, the expense of the treatment are always very high. The paper started with the advantages of Up-flow...
Phase hybrid bio-reactor (HBR) was used in treating coke-plant wastewater by adding submerging fiber-ball fillers in suspended growth activated sludge. The optimum operation parameters for the highest performance were determined. It is found that the hybrid biological reactor works well for the coke plant wastewater treatment in terms of COD, NH4+-N and other refractory organic compounds removal...
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