| The preserved Szechuan pickle wastewater is high in salinity(7%),high in organic concentration, high in nitrogen concentration and phosphorus concentration. The traditional biology disposal are difficult to treat because of the restraining effect to the microorganism by high salinity. The pollution to the Three Gorges Reservoir region's water environment by the preserved Szechuan pickle wastewater bacome the bottle-neck problem to the development of preserved Szechuan pickle industry, an immediate feasible disposal technic to solve the pollution problem by the preserved Szechuan pickle wastewater is in high priority. The realistic significance to protect the safety of water environment and guarantee the persistent development of characteristic industry is obvious.In order to solve the difficult problems in the construction of microorganism system during the disposal process of high-salinity preserved Szechuan pickle waste water, the feasibility of construction of high-salinity micro-biological disposal system and the effect of betaine to the construction of biological nitrogen removal system under high-salt condition were studied in this paper. The measure to construct aerobic, denitrify and anaerobic high-salinity micro-biological disposal system were educed.High-salinity micro-biological disposal system with halophiles as the dominant physiological community was constructed, a combinative technology was brought forward to dispose the high-salinity preserved Szechuan pickle waste water. The influencing factor to each arts and crafts were studied, the key circulate parameter were gain, the primary conclusions were educed by study:①With the measure of enhance 0.5%(NaCl) salinity of inflow every time, high-salinity micro-biological disposal system which the salinity is 7%(NaCl) could be constructed, the bacilliform halophiles were the dominant physiological community. When the temperature was controlled at 25℃, the DO was 5 mg/L and the volumetric loading was 1.0 kg COD/m3.d,the COD removal rate of the reactor could reach to 97.44%. The bataine accelerated the cultivation of nitrobacteria and denitrifying bacteria in high salinity environment and shortened the construction time of biological nitrification and denitrification system under high-salt condition. With the measure of inoculate anaerobic salt tolerant activated sludge in ASBBR and start-up with low loading,high-salinity anaerobic micro-biological disposal system which the salinity is 7%(NaCl) could be constructed, with the bacilliform halophiles was the dominant physiological community. When the temperature was 32℃and the volumetric loading is 1.0 kg COD/m3.d, the COD removal rate of the reactor could reach to 88.03%.②The experiment of treating the preserved Szechuan pickle wastewater by using the combinative technology of"ASBBR- SBBR- SBBR- chemical-dephosphorization"showed that: Under the conditions of volumetric loading was 3.0 kg COD/m3.d, hydraulic retention time was 2 days,82.4% of the COD can be removed in ASBBR reactor. Under the conditions of circulation was anoxic 3h-aerobic 6h,the carriers package was 60%,the sludge discharge time was 2 days, which can make the COD(1761.5 mg/L) and PO43--P (38.3 mg/L) in the influent declined to COD(541.3 mg/L) and PO43--P (16.5 mg/L) in the effluent, 69.3% of the COD and 56.9% of the PO43--P can be removed in the first SBBR reactor. In the second SBBR reactor, when the nitrogen loading was 0.1 kgN/m3.d,circulation was aerobic 8h- anoxic 3h- aerobic 1h,made the concentration ratio of C and N was 6 by delivering original waste water after aerated for 6h,which can make the COD(541.3 mg/L),NH4+-N (525 mg/L) and TN (545 mg/L) in the influent declined to COD(250.8 mg/L),NH4+-N (12.3 mg/L) and TN (18.0 mg/L) in the effluent,NH4+-N and TN meet the national standards,53.7% of the COD,97.7% of the NH4+-N and 96.7% of the TN can be removed, short-cut nitrification and denitrification was realized in the second SBBR reactor. While adopting aluminum sulfate as a dephosphorization medicament,under the conditions of the concentration ratio of Al3+ and P was 9,which can make the COD(250.8 mg/L) and PO43--P (8.5 mg/L) in the influent decline to COD(93.6 mg/L) and PO43--P (0.1 mg/L) in the effluent, COD and PO43--P meet the national standards,62.7% of the COD and 99.9% of the PO43--P can be removed in chemical-dephosphorization technics.③The experiment of separating the halophile bacterium in each reactor of combinative technology showed that: in 7% salinity,there were anaerobic short halophile microorganisms in the ASBBR reactor, aerobic long halophile microorganisms in the first SBBR reactor,halophile nitrobacteria in the second SBBR reactor. They are the dominant physiological community. The nitrosobacteria and the nitrobacteria in the second SBBR reactor were taken count,the result showed that the quantity ratio of nitrosobacteria and nitrobacteria was 1.6～2.3, there proving that the nitrosobacteria were the dominant physiological community in the reactor.
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