The Study Of Air Conditioning

With the becoming increasingly acute problem of water eutrophication and water qualityindex system for the continuous strict, the wastewater teehniques develop edgradually fromthe period of pure COD removal to the period of simultaneous COD,nitrogenand Phosphorusremoval. Nitrogen and phosphorus removal technology for the purpose of controllingeutrophication problem became one of the focuses of attention in a range of water pollutioncontrol.Simultaneous nitrification/denitrification and phosphorus removal (SNDPR) canshorten nitrogen and phosphorus removals processes and makenitrification and denitrifyingphosphorus removal simultaneous in activated sludge systems, which intends to treatmunicipal wastewater in the south china provided with character of the unreasonable rationsof C/N/P and low carbon.The experiment carried out operated with artifieial municipal wastewater by sequeneingbatch reaetor(SBR), Sludge was domesticated by anaerobic/aerobic and anaerobic/anoxi/aerobic modes, which make it nitrifying bacteria and denitrifying phosphorus bacteria coexist;In order to explore the necessary conditions of the stability and sustained SNDPR process，thetreatment effects of wastewater and electrochemical parameters(pHand ORP) by SNDPRprocess operated under different oxygen modes (continuous aeration and intermittent aeration)were investigated and the suitable operating conditions under laboratory conditions wasdetermined; According to the variation of the amount of PHB in the reaction process,thecorrelation between the PHB variation and SNDPR was analyzed. The control conditions ofPHB’directional accumulation and steady degradation were asked and SNDPR processmechanisms were explored in microbiological environment theory.The results show that, the proportion of denitrifying phosphorus removal bacteriaincreased to85.9%and the rate of nitrification is up to5.97mg/(L h) after the two stages ofdomestication, so the good coexistence of denitrifying phosphorus removal bacteria andnitrifying bacteria was realized and the effieieney of SNDPR was Strengthened; In the sameamount of aeration, it is more beneficial to SNDPR process in intermittent aeration mode thanin continuous aeration mode;it is more easier to achieve the stable degradationof PHB and to maintain stable low-oxygen environment with the Lower AF and the higher fIAthan others;When it is about40L/h of the aeration rate, about0.5of AF and about24of fIA,the stabilityand sustainability of SNDPR system is up to the best, in the conditions of low-carbon urbansewage treatment effect: TN removal efficiency is87.9%, TP removal efficiency is93.5%.