HU Pei-pei,HOU Feng,FAN Ying,et al.Aerobic Fermentation Process of Deep Dewatering Sludge[J].China Water & Wastewater,2021,37(17 17):74-77.
Aerobic Fermentation Process of Deep Dewatering Sludge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
74-77
Column:
Date of publication:
2021-09-01
- Keywords:
- sludge; aerobic fermentation; deep dewatering; water content
- Abstract:
- Aerobic fermentation is an important process for municipal sludge treatment and disposal. The traditional aerobic fermentation process utilizes the mechanical dewatered sludge (water content is about 80%) as the raw material, and needs to add a large number of auxiliary materials and returned mixture to regulate the water content, which leads to the problems of high reagent cost, large footprint and low efficiency. In the present work, the aerobic fermentation of the deep dewatering sludge was carried out in a pilot-scale device by optimizing the ratio of different materials. The raw material was the mixture of low-temperature dry sludge with water content of about 60% from the first phase of Xinzhuang Sewage Treatment Plant in Guiyang and auxiliary materials and returned mixture with a proportion of about 13% of the total materials. The temperature and the main product indexes were recorded during the fermentation. The aerobic fermentation was carried out normally even if significantly reducing the dosage of the auxiliary materials to the deep dewatering sludge and footprint after modification of the process, and the modified process also accelerated the temperature rise and shortened the fermentation period.
Last Update:
2021-09-01