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摘要:
To ensure the safety of water in the process of translation in long distance raw water diversion pipe, the damagemant and recovery of purification by added chlorine to Biofilms Annular Reactor(BAR) which simulated the pipe was investigated. The results showed that the prechlorination can damage the pipe bioflim, lower the removal rate of NH4+-N, NO2--N, CODMn, TP, and the effluent of concentration of CODMnand TP was elevated in short term and NO2--N concentration was rised in long term after prechlorination. The effluent concentration of NO2--N can be reached 7 times of the influent. The recovery of removal of NH4+-N was earlier 2 days than that of NO2--N, and NH4+-N and NO2--N could be completely repaired on 8 dsys and 10 days, respectively. The removal of CODMn and TP can be completely repaired on 8 days.
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