Abstract:

The"hydrolytic acidification-SBR-microfiltration" combined treating process has been used for treating mid-stage wastewater in pulp and paper industry. The experimental results show that by the combined process, the average removing rates of COD_Cr, ammonia nitrogen, total phosphorus, SS and TOC are 91.8%, 93.8%, 94.7%, 100% and 91.4%, respectively, when the COD_Cr of original wastewater is 1 100-1 500 mg/L, pH 6.8-7.2, water temperature in hydrolysis process 25-30 ℃, HRT 6 h, C/N ratio 60:1, and SBR process reaction time 8 h, temperature 34-38 ℃. The effluent water quality can reach the Water Pollutant Discharge Standard in Pulp and Paper Industry(GB 3544—2008). Since the microfiltrating membrane has been placed in the biochemical reaction, its membrane pollution is reduced and has certain interception effect on the polluted materials.

Key words: hydrolytic acidification, sequential activated sludge process, microfiltration, mid-stage wastewater in paper and pulp industry

摘要：

采用“水解酸化+SBR+微滤”工艺处理制浆造纸中段废水。试验结果表明，在原废水COD_Cr为1 100~1 500 mg/L、pH为6.8~7.2，水解工艺水温为 25～30 ℃、HRT为6 h、碳氮比为60：1，SBR工艺反应时间为8 h、温度为34～38 ℃的条件下，组合工艺对废水COD_Cr、氨氮、总磷、SS和TOC的平均去除率分别为91.8%、93.8%、94.7%、100%和91.4%，出水水质达到《制浆造纸工业水污染物排放标准》（GB 3544—2008）的要求。微滤膜置于生化反应后，降低了膜污染，同时对污染物质有一定的拦截效果。

关键词: 水解酸化, 序批式活性污泥法, 微滤, 制浆造纸中段废水

CLC Number: 

• X703.1