Ozonation reduced sludge production

     In biological wastewater treatment sludge produced in the process is increasingly becoming a very important issue, because through landfill or agricultural reuse treated sludge is limited, so need to study sewage treatment plant sludge disposal methods . Ozonation is a good sludge reduction technology, which by oxidation of solid particles, improve the biodegradability of sludge to reduce the amount of sludge 60, and 65. Especially for anaerobic biological treatment sludge generated in the system is particularly useful because anaerobic sludge biological treatment system to produce particularly low biodegradability. Normal ozone dosage production: 0.050g O3/gSS--0.100 g O3/gSS, there are reports that in some special cases dosing a certain amount (0.136 g O3/gSS) ozone can reach zero sludge production . This process is in a certain period of time within a sludge return line ozonation ozone dosing. Ozonation in the sludge return line can be set in the terminal for the reaction tank (Figure 6-10). Ozone can destroy micro tissue, produce more organic, partly mineralized sludge. The other part of the sludge after ozonation tank enters the aerobic mineralization occurred after, which makes the whole process very little amount of sludge generated. This process of the system other indicators also improved effect. For example, oxidation treatment using ozone, the sludge volume index can be maintained 100Ml / g or less, and no ozone oxidation treatment during the same period, this value will be high up 800mL/g9

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