XUQian,JIANGCai-fang,HEZhi-jian,et al.Analysis and Prospect of Urban Sludge Treatment and Disposal Process in Nanning City[J].China Water & Wastewater,2023,39(10):31-37.
南宁市污泥处理处置工艺分析及展望
- Title:
- Analysis and Prospect of Urban Sludge Treatment and Disposal Process in Nanning City
- Keywords:
- sludge treatment and disposal; aerobic composting; cement kiln co-incineration; light ceramsite; industrial synergy
- 摘要:
- 从南宁市生活污水处理厂污泥泥质出发，详细论述了南宁市选择好氧堆肥、水泥窑协同焚烧、污泥焚烧制取轻质陶粒工艺处理处置污泥的原因，并分析了各处理处置方式的特点，对产生的问题提出了解决办法。好氧堆肥的主要优点在于建设投资省、建设周期短、技术门槛低，可以短时间内建成，同时存在产生臭气、占地大、无法接收石灰调理污泥及产品监管的问题；水泥窑协同焚烧具有显著的污泥减量化、重金属固化、污泥循环利用并减少水泥窑脱硝成本等优势，但同样存在技术门槛较高、能耗高、检修时间较长的问题；烧制陶粒具有掺烧比大、技术门槛低、易于建成的特点，但也存在对污泥的属性有要求以及需要试烧的问题。因此，要彻底解决污泥围城的问题，必须走多产业协同的道路，做到资源互补。
- Abstract:
- Based on the sludge characteristics analysis of Nanning municipal sewage treatment plant, the reasons for the selection of aerobic composting, cement kiln co-incineration and sludge incineration to produce light ceramsite were discussed. The characteristics of various treatment methods were analyzed and the solutions to the problems were put forward. Low construction investment, short construction period and low technical threshold, which can be built in a short time are the main advantages of aerobic composting. However, there are still some problems such as odor, large land occupation, no acceptance for sludge conditioning by lime and difficult supervision of products. The co-incineration of cement kilns has significant advantages in sludge reduction, heavy metal solidification, sludge recycling and the cost reduction of cement kiln denitration. But long maintenance time, high technical threshold and high energy consumption are the main obstacles for its application. The fired ceramsite has the superiority of large blending ratio, low technical threshold and easy to build. But the requirements of sludge properties standard and trial firing are still the problem to fix. Therefore, we must take multi-industry cooperation and achieve resource complementarity to completely solve the problem of sludge in light ceramsite production.
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