• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Physical, chemical, and microbial analysis of domestic wastewater treated by small constructed wetlands designed for individual households.
【24h】

Physical, chemical, and microbial analysis of domestic wastewater treated by small constructed wetlands designed for individual households.

机译：专为个人家庭设计的小型人工湿地处理的生活污水的物理，化学和微生物分析。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Many small communities located in rural areas of the United States lack adequate domestic wastewater treatment plants. Constructed wetlands are being promoted as low-cost, low-maintenance systems for treatment of domestic wastewater in areas where standard septic tanks fail. In order to evaluate the efficacy of small constructed wetlands, 20 small-scale wetlands mesocosms (100 gal each) containing five plant treatments (no plants/control, Typha, Scirpus, and Juncus monocultures, and all three species combined) were planted into pea gravel at either 18 or 24 inches in depth. Each mesocosm received 5 gal/day of primary-treated domestic sewage. Mesocosms were monitored on a monthly basis over a two year period for TSS, BOD{dollar}sb5,{dollar} TKN, TP, and metals. Fecal coliforms, enterococci, Salmonella, Shigella, Yersinia and coliphage were also enumerated. Significant differences between influent and effluent water quality (p {dollar}<{dollar} 0.01) generally were observed in total suspended solids, 5-day biochemical oxygen demand, TKN and P. Increased dissolved oxygen and reduction in fecal coliforms and enterococci, Salmonella, Shigella, Yersinia, and coliphage populations were also observed. Effluent quality from the mesocosms planted with mixtures of the three species was frequently (p {dollar}<{dollar} 0.10) better than mesocosms containing monocultures of Scirpus or Juncus alone. Mesocosms containing Typha often equaled the mixed plantings in treatment effectiveness.; Additionally, functional diversity was examined for the primary-clarified wastewater, control/unplanted and mixculture mesocosms. Patterns of potential carbon source utilization by microbial communities were analyzed as a means of differentiating among the samples. Utilization of 95 separate C sources was determined by inoculating microbial suspensions obtained from wastewater influent, and unplanted control, or planted mesocosms (containing Typha, Scirpus, and Juncus) into BIOLOG plates and quantifying color production. Distinctive patterns of C source utilization were apparent for each of the three samples, and the differences among samples were consistent of the sampling period (December 1995-December 1996). Temporal shift in C source utilization related to plant development state and environmental conditions were observed during the sampling period.
机译：美国农村地区的许多小社区都缺乏足够的生活污水处理厂。在标准化粪池失灵的地区，人工湿地正在作为一种低成本，低维护的系统进行处理，以处理生活污水。为了评估小型人工湿地的功效，在豌豆中种植了20种小型湿地中观世界（每个100 gal），其中包含五种植物处理方法（无植物/对照，香蒲，Scirpus和Juncus单一栽培，并且所有三种组合）砾石深度为18或24英寸。每个中观都接受5加仑/天的初级处理生活污水。在两年期间，每月对TSS，BOD {dollar} sb5，{dollar} TKN，TP和金属进行监测。还列举了粪便大肠菌，肠球菌，沙门氏菌，志贺氏菌，耶尔森氏菌和大肠杆菌。通常在总悬浮固体，5天生化需氧量，TKN和P中观察到进水和出水水质之间的显着差异（p {dollar} <{dollar} 0.01）。溶解氧增加，粪便大肠菌群和肠球菌，沙门氏菌减少，也观察到志贺氏菌，耶尔森氏菌和噬菌体种群。用这三种物种的混合物种植的中生代膜的出水质量通常好于仅含Scirpus或Juncus单一栽培的中生代膜（p {dollar} <{dollar} 0.10）。含有香蒲的中草药在治疗效果上通常等于混合种植。另外，检查了主要澄清废水，对照/未种植和混合培养中观的功能多样性。分析了微生物群落潜在碳源利用的模式，作为区分样本的一种手段。通过将获自废水进水的微生物悬浮液和未种植的对照或种植的中观（含香蒲，Scirpus和Juncus）接种到BIOLOG平板中并定量颜色产生，确定了95种单独C源的利用率。三个样本中每个样本的C源利用都有明显的区别，样本之间的差异与采样期间（1995年12月至1996年12月）一致。在采样期间观察到与植物发育状态和环境条件有关的碳源利用的时间变化。

著录项

  • 作者

    Hench, Keith R.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Biology Microbiology.; Environmental Sciences.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 186 p.
  • 总页数 186
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 微生物学;环境科学基础理论;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号