摘要
从某企业生化污泥中筛选并分离出一株耐盐菌株GXNYJ-12,经鉴定为盐单胞菌属(Halomonas sp.)。该菌株可在0~25%盐度下有效降解苯酚,且具有较强耐受S2-毒性的能力,单因素试验显示其最适pH为8,最适温度为30℃。深入研究表明,该菌株可有效降解COD 8 132 mg/L、硫酸盐质量浓度28 000 mg/L、含盐量42 000 mg/L的长链二元酸酸化废水,在氮源投加质量浓度200 mg/L条件下,经96 h好氧生化,其COD可降至500 mg/L以下,满足进入市政等二级污水处理场要求。GC-MS分析显示该菌株能降解二元酸废水中绝大部分有机物,具有良好应用价值。
A salt-tolerant strain named GXNYJ-12 was screened and isolated from the biochemical sludge of an enterprise,the strain was preliminarily identified as Halomonas sp. The strain could effectively degrade phenol at 0-25%salinity and had strong tolerance to S2-toxicity. Single factor test showed that its optimum pH and temperature were 8 and 30 ℃. Further research showed that the strain could efficiently degrade the dibasic acid fermentation wastewater with COD concentration of 8 132 mg/L,sulfate concentration of 28 000 mg/L and salt content of 42 000 mg/L. Under the condition of nitrogen source dosage of 200 mg/L,its COD could be reduced to less than 500 mg/L after 96 h aerobic biochemical reaction,which satisfied the requirements of entering municipal secondary sewage treatment plants.GC-MS analysis showed that the strain could remove most of organic compounds in dibasic acid wastewater,which showed strong degradation ability and had good application value.
作者
马和旭
郭宏山
秦中良
卢利玲
程晓东
Ma Hexu;Guo Hongshan;Qin Zhongliang;Lu Liling;Cheng Xiaodong(Sinopec Dalian Research Institute of Petroleum and Petrochemicals,Dalian 116045,China;Sinopec Yangzi Petrochemical Co.,Ltd.,Nanjing 210048,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2021年第7期105-111,共7页
Industrial Water Treatment
关键词
硫酸盐
有机废水
耐盐
降解
长链二元酸
sulfate
organic wastewater
salt tolerance
degradation
long-chain dibasic acid