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.
Analysis and Prospect of Urban Sludge Treatment and Disposal Process in Nanning City
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第10期
Page:
31-37
Column:
Date of publication:
2023-05-17
- Keywords:
- sludge treatment and disposal; aerobic composting; cement kiln co-incineration; light ceramsite; industrial synergy
- 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.
Last Update:
2023-05-17