CAJ | 학술논문

从大连旅顺盐场底泥中筛选出适合高盐度的嗜盐菌,在序批式间歇反应器(SBR)中对其进行3.5 %(质量分数)盐度的驯化,污泥混合液悬浮固体(MLSS)平均质量浓度达600 mg/L.污泥比耗氧速率(SOUR)测量结果显示,内源呼吸阶段污泥SOUR为10.36 mg/(g·h),外源呼吸阶段污泥SOUR达到29.09 mg/(g·h),表明所筛选的嗜盐菌培养的污泥具有较高活性.利用培养的污泥进行高盐模拟废水处理试验,结果表明,对盐度为3.5 %、COD为240~340 mg/L的高盐废水,在每周期12 h、曝气量0.6L/min、污泥MLSS为600 mg/L、污泥龄为18 d条件下,COD去除率达95 %以上,NH_4~+-N去除率达61 %,TP去除率达55 %.改变进水有机负荷对出水COD去除影响不大,该系统耐有机负荷冲击能力较强;盐度负荷的改变对COD的去除影响不大,而NH_4~+-N去除率有明显变化,在3.5 %和5.0 %的盐度下,NH_4~+-N去除率分别为61 %和31 %.
종대련려순염장저니중사선출괄합고염도적기염균,재서비식간헐반응기(SBR)중대기진행3.5 %(질량분수)염도적순화,오니혼합액현부고체(MLSS)평균질량농도체600 mg/L.오니비모양속솔(SOUR)측량결과현시,내원호흡계단오니SOUR위10.36 mg/(g·h),외원호흡계단오니SOUR체도29.09 mg/(g·h),표명소사선적기염균배양적오니구유교고활성.이용배양적오니진행고염모의폐수처리시험,결과표명,대염도위3.5 %、COD위240~340 mg/L적고염폐수,재매주기12 h、폭기량0.6L/min、오니MLSS위600 mg/L、오니령위18 d조건하,COD거제솔체95 %이상,NH_4~+-N거제솔체61 %,TP거제솔체55 %.개변진수유궤부하대출수COD거제영향불대,해계통내유궤부하충격능력교강;염도부하적개변대COD적거제영향불대,이NH_4~+-N거제솔유명현변화,재3.5 %화5.0 %적염도하,NH_4~+-N거제솔분별위61 %화31 %.
The halophilic bacteria adapted to high salinities were isolated from the substrate sludge of Dalian Lvshun Salt Field in China. These bacteria were acclimated in the sequencing batch reactors (SBR) with salinity was 3.5%, and sludge with average concentration of 600 mg/L was obtained. The specific oxygen uptake rate (SOUR) was measured, and the results showed that the endogenous and exogenous respiration of oxygen uptake rate were reached 10.36 mg O_2/(gVSS·h)and 29.09 mg O_2(gVSS·H)respectively.This indicated that the sludge cultivated from the halophilic bacteria had high activity. A system that employing this sludge was built for the treatment of high-sah wastewater, with the operating conditions of salinity of 3.5 %, COD of 240-340 mg/L, an operating period of 12 h, aeration rate of 0.6 L/min and sludge retention time of 18 d, the system achieved the COD, NH_4~+-N and TP removal efficiency of 95%, 61% and 55% respectively. The organic loading had little effect on COD removal, which means the resistance capability, of this system against organic loading was high. NH_4~+-N removal efficiency of the sys-tem was highly correlated with salinity loading, when the salinity loading was 3.5% and 5%, the removal efficiency of NH_4~+-N were 61% and 31% respectively.