A-A-O工艺处理焦化废水的可行性与效用(英文)

研究了实验室规模A/A/O工艺处理焦化废水的可行性与效用。试验设置了两个运行策略(phaseⅠ和phaseⅡ),其中phaseⅠ系统去除COD,NH₃-N依赖于生物和降解作用; phaseⅡ系统投加PAC,具有生物降解与吸附的双重功能。结果表明,phaseⅡ系统的COD,NH₃-N去除率可达92.2%,较phaseⅠ提高19%;同时对有毒有机污染物具有明显的转化与降解作用。     

A-A-O工艺处理焦化废水的可行性与效用 (英文 )

研究了实验室规模 A/ A/ O工艺处理焦化废水的可行性与效用 .试验设置了两个运行策略(phase 和 phase ) ,其中 phase 系统去除 COD,NH3 - N依赖于生物和降解作用 ;phase 系统投加PAC,具有生物降解与吸附的双重功能 .结果表明 ,phase 系统的 COD,NH3 - N去除率可达 92 .2 % ,较phase 提高 19% ;同时对有毒有机污染物具有明显的转化与降解作用     

Assessing the drivers of land use change in the Rumpi hills forest protected area,Cameroon

Protected areas serve two objectives, biodiversity conservation and securing of ecosystem services. But the recent expansion of human activities around Cameroon’s Rumpi Hills Forest Reserve in this Era of Sustainable Development Goals is a call for concern. This study assesses land use and land cover change around the reserve and their potential impact on its sustainability. A total of 250 household surveys were conducted across 13 villages in four selected sites around the reserve in addition to 11 focus group discussions. Landsat 7 ETM (2000) and Landsat 8 OLI (2014) images and topographic maps were utilized to quantify land use and land cover change.

During the 14-year period, dense forest dropped to 90.2% while settlements increased from 744.6 to 2148.8 hectares in 2014. Also, farmlands increased by 18.25% representing a change from 9400.4 to 11117.16 hectares. Over 98% and 85% of the respondents are engaged in the cultivation of food and cash crops and are dependent on the forests for timber and non-timber forests products. Land and tree-based interventions that improve soil fertility should be promoted among smallholder farmers to ensure the sustainability of protected areas in Cameroon.