Abstract:

Semi-coke that has been modified with steam at high temperature is used for the static adsorption of TOC in biochemically treated effluent from coking wastewater. The effects of influencing factors，such as adsorption time， pH，adsorbent dosage，particle size，etc.，on the treatment efficiency are investigated. The results show that after adding 20 g/L 1-2 mm of modified semi-coke to wastewater whose pH is 4，at room temperature and adsorption time 30 min，the TOC removing rate of biochemically treated effluent from the coking wastewater is more than 60%. The concentration and variety of the organisms in samples after the adsorption process have decreased greatly.

Key words: modified semi-coke, coking wastewater, adsorption

摘要：

利用水蒸气高温改性后的兰炭静态吸附焦化废水生化出水中的TOC，考察了吸附时间、pH、吸附剂用量、粒径等因素对处理效果的影响．结果表明，向废水(pH=4)中投加20 g/L改性兰炭(粒径1～2 mm)，室温下吸附30 min后，对焦化废水生化出水的TOC去除率在60%以上．吸附后水样中的有机物浓度和种类都大幅下降．

关键词: 改性兰炭, 焦化废水, 吸附

CLC Number: 

• X703