Chan S Y, Tsang Y F, Chua H, Sin S N, Cui L H
Civil and Structural Engineering Department, The Hong Kong Polytechnic University, Hong Kong SAR, China.
Bioresour Technol. 2008 Jun;99(9):3774-81. doi: 10.1016/j.biortech.2007.07.018. Epub 2007 Aug 20.
A practical and affordable wastewater treatment system serving small community in suburban areas was studied. The system was a vegetated sequencing batch coal slag bed integrated with the rhythmical movement of wastewater and air like that of a sequencing batch reactor. The removal mechanisms capitalized on the pollutant removal process in conventional constructed wetland. Cyperus alternifolius was planted into the coal slag bed to form a novel plant-soil-microbial interactive system. Nutrients in the domestic wastewater, which cause environmental nuisance like eutrophication, were targeted to be eliminated by the process design. Operated with the contact time of 18 h, the treatment systems achieved around 60% removal efficiency for carbonaceous matters. The removals of ammonia nitrogen and phosphorus were about 50% and 40%, respectively, while the removal of total suspended solids was approaching 80%. From the current study, the construction cost of the vegetated sequencing batch coal slag bed was 256 RMB/m3 and the operation cost was 0.13 RMB/m3. With the advantages of ease of operation, low costs, desirable treatment efficiency and aesthetic value, the vegetated sequencing batch coal slag bed is proposed to be an alternative for onsite domestic wastewater treatment in suburban areas.
研究了一种服务于郊区小型社区的实用且经济实惠的废水处理系统。该系统是一个植被化序批式煤渣床，结合了废水和空气的节律性运动，类似于序批式反应器。其去除机制利用了传统人工湿地中的污染物去除过程。将风车草种植在煤渣床中，形成了一个新型的植物-土壤-微生物交互系统。生活污水中导致富营养化等环境问题的营养物质，通过工艺设计旨在被去除。该处理系统在接触时间为18小时的情况下，对含碳物质的去除效率达到约60%。氨氮和磷的去除率分别约为50%和40%，而总悬浮固体的去除率接近80%。从当前研究来看，植被化序批式煤渣床的建设成本为256元/m³，运行成本为0.13元/m³。鉴于其操作简便、成本低、处理效率理想和具有美学价值等优点，植被化序批式煤渣床被提议作为郊区生活污水就地处理的一种替代方案。
