Ic + Cass Processing Start The Study Of The Production Of Lactic Acid Wastewater

The lactic acid wastewater treatment project in Henan Jindan lactic acid Co.Ltd was studied in this paper. The article collected concerned information, and analyzed the souse,the flux and the feature of water of the lactic wastewater. The article also compared lactic wastewater disposal technology with the overseas. Through applying the anaerobic and aerobic technology, determining test plan, carrying out local test analysis. The article has mostly studied the first start-up rule and offered empirical data on the craft of IC +CASS in treating lactic wastewater, so it had the certain reference value.Basing on the connection of the organism degradation and cellular composing in the IC, an influent model on organic loads M_n=(1+k)^n-1M₁ and space loads N_n=(1+k)^n-1N₁ were established. The projects of influent wastewater were also presented. The large percentage of inoculation sludge came from anaerobic dehydration sludge of domestic wastewater treatment plant of Zhengzhou city .At the beginning of the start-up, the sludge concentration of IC were 12.4gVSS/L.The start-up of the IC reactor lasted 6 months from August 2006 to February 2007. We explored low strength influent wastewater and maintain the wastewater strength, at the same time we improved the organic loads gradually by increasing the water quantity up to the design capacity. When the IC reactor has reached the design influent strength, a large amount of granular sludge has been cultivated in the IC reactor. All those indicate the IC reactor has been started up successfully.Through analyzing the curves of the removing rate of COD,pH,VFA,temperature,we drew the following conclusions,as well as the granular sludge forming process and the running situation of the CASS reactor:①,The IC reactor has been successfully used in lactic acid wastewater processing as the third generation highly effective anaerobic reactor,and has obtained the better processing effect.It has the positive significance for widening the application scope of theIC reactor.②,The IC reactor can stably run on the condition of 5.4kgCOD/ (m³·d) space loads. The COD removals can arrtive at 86.6%. A large amount of granular sludge has been cultivated in the IC reactor.③,According the relation between the organism degeneration and the cellular composing in the IC reactor,we established the influent model on organic loads and space loads.And the practice can prove that the method is feasible.④,The CASS reactor provided the guarantee for further reducing COD and achieving the discharging standard.And the reactor can be used to prevent sludge bulge occurrence in the processing of lactic acid wastewater.⑤,In the research we adopted the craft of pretreatment +IC +CASS to treat lactic acid wastewater.The ability of removing organic matter is stable, and the total removeing rate of COD may achieve 97.2%.The practice indicated that the craft of processing lactic wastewater which is difficult to degrade is practical feasible and has the certain promoted value.