Becker W, Schoen M A, Wett B
University of Innsbruck, Institute of Infrastructure/Environmental Engineering, Technikerstr.13, 6020, Innsbruck, Austria.
Water Sci Technol. 2007;56(11):1-9. doi: 10.2166/wst.2007.726.
In the framework of a program for environmental protection conducted by the German mountaineers' club (DAV) problems emerging from residual solids accumulating in on-site wastewater treatment plants of mountain refuges were investigated. To handle these problems in an ecologically and economically reasonable way two devices for solar-supported treatment of sludge and bio-solids have been developed. These units support gravity-filtration and evaporation of liquid sludge as well as thermal acceleration of composting processes. Two solar sludge dryers were installed and operated without external energy supply at alpine refuges treating primary and secondary sludge, respectively. Batch-filling during the season could increase load capacity and a total solids concentration of up to 40% could be achieved before discharge at the beginning of the next season. The promising results from the solar sludge dryer encouraged for the development of a solar composter. The period of temperature levels suitable for composting biosolids in mountain areas can be extended considerably by application of this technology--measured temperature distribution indicated no freezing at all.
在德国登山者俱乐部（DAV）开展的环境保护项目框架内，对山区避难所现场污水处理厂中残留固体积累所产生的问题进行了调查。为了以生态和经济合理的方式处理这些问题，已开发出两种用于太阳能辅助处理污泥和生物固体的设备。这些装置有助于液体污泥的重力过滤和蒸发，以及堆肥过程的热加速。在高山避难所分别安装并运行了两台太阳能污泥干燥机，用于处理初级和二级污泥，无需外部能源供应。季节期间的分批填充可提高负载能力，在下一季开始排放前可实现高达40%的总固体浓度。太阳能污泥干燥机取得的良好结果促使人们开发太阳能堆肥器。通过应用这项技术，适合山区生物固体堆肥的温度水平期可大大延长——实测温度分布表明根本没有结冰。
