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ATAD- autothermal thermophilic aerobic digestion (auto-heated thermophilic aerobic digestion) technology in recent years concern sludge stabilization and reduction technology , environmental conditions in the aerobic microbial through its exothermic reaction, some of the heat to supplement the energy consumption of the system , and the remaining heat is used to increase the temperature of the reaction system , can achieve the purpose of high aerobic sludge digestion . High temperature cell lysis may occur , sterilization , reducing the number of parasites and other processes. The issue on sludge aerobic digestion technology at home and abroad on the basis of summarizing research results , through experimental studies from a new perspective autothermal thermophilic aerobic digestion process factors affecting the degree of sludge digestion . Self-designed experiments autothermal thermophilic aerobic digestion reactor (ATAD), Xi'an Beishiqiao dewatered sludge sewage purification center mud as the source , using the batch reaction mode, by changing the operating parameters continuously in different conditions detection sludge VSS, TP, TN , ammonia , mud temperature , COD and other indicators, to determine optimal operating conditions of the system , namely: into the mud concentration of 5 % to 8% , aeration 0.4L/min ~ 0.8L / min, mechanical stirring intensity 120r/min; Click here to run conditions , the sludge temperature can be automatically increased to 48 ℃, VSS removal rate reached 40.2%, DHA decreased rate of 94.33% , to achieve efficient sterilization , sludge stabilization but dewatering performance deteriorated. The optimum operating conditions, by monitoring DHA, COD changes of autothermal aerobic digestion of the sludge and the sterilizing effect of stability ; the analysis of changes in resistance of sludge , aerobic digestion reaction was studied process for sludge dewatering performance. By analyzing the sludge TOC, TP, ammonia change synchronization studied lysis CAUSE ; through extracellular polymeric EPS and sludge monitoring and comparing specific resistance variation to study the effects on pollution lysis sludge dewatering performance ; joint TOC and variation of extracellular polymeric studied lysis and protein content changes in the relationship ; By contrast EPS, DHA relationship between the changes discussed autothermal aerobic digestion reaction process biological recombination .
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