Advanced Water Management Centre, Building 60, Research Road, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia.
Water Res. 2011 Dec 1;45(19):6564-74. doi: 10.1016/j.watres.2011.09.054. Epub 2011 Oct 6.
Controlling sulfide (H(2)S) production and emission in sewer systems is critical due to the corrosion and malodour problems that sulfide causes. Chemical dosing is one of the most commonly used measures to mitigate these problems. Many chemicals have been reported to be effective for sulfide control, but the extent of success varies between chemicals and is also dependent on how they are applied. This industry survey aims to summarise the current practice in Australia with the view to assist the water industry to further improve their practices and to identify new research questions. Results showed that dosing is mainly undertaken in pressure mains. Magnesium hydroxide, sodium hydroxide and nitrate are the most commonly used chemicals for sewers with low flows. In comparison, iron salts are preferentially used for sulfide control in large systems. The use of oxygen injection has declined dramatically in the past few years. Chemical dosing is mainly conducted at wet wells and pumping stations, except for oxygen, which is injected into the pipe. The dosing rates are normally linked to the control mechanisms of the chemicals and the dosing locations, with constant or profiled dosing rates usually applied. Finally, key opportunities for improvement are the use of mathematical models for the selection of chemicals and dosing locations, on-line dynamic control of the dosing rates and the development of more cost-effective chemicals for sulfide control.
由于硫化物会引起腐蚀和恶臭问题，因此控制污水系统中的硫化物（H2S）的产生和排放至关重要。化学投加是缓解这些问题最常用的措施之一。有许多化学物质已被报道可有效控制硫化物，但化学物质的成功程度因化学物质而异，也取决于它们的应用方式。本行业调查旨在总结澳大利亚目前的实践情况，以期协助水务行业进一步改进其做法，并确定新的研究问题。结果表明，投加主要在压力总管中进行。对于低流量的污水管道，氢氧化镁、氢氧化钠和硝酸盐是最常用的化学品。相比之下，铁盐更优先用于大型系统中的硫化物控制。在过去几年中，氧气注入的使用急剧下降。化学投加主要在湿井和泵站进行，除了氧气是注入管道中。投加率通常与化学物质的控制机制和投加点有关，通常采用恒定量或轮廓投加率。最后，改进的关键机会是使用数学模型选择化学物质和投加点，在线动态控制投加率，以及开发更具成本效益的硫化物控制化学物质。
