HU Pei-pei,HOU Feng,FAN Ying,et al.Aerobic Fermentation Process of Deep Dewatering Sludge[J].China Water & Wastewater,2021,37(17):74-77.
深度脱水污泥好氧发酵工艺研究
- Title:
- Aerobic Fermentation Process of Deep Dewatering Sludge
- Keywords:
- sludge; aerobic fermentation; deep dewatering; water content
- 摘要:
- 好氧发酵是市政污泥处理处置的重要工艺。常规污泥好氧发酵工艺以机械脱水的湿污泥（含水率约为80%）为原料，为调节含水率，需添加大量辅料和返混料，存在物料成本高、占地大、发酵效率低等弊端。为此,以深度脱水后的污泥为原料，采用好氧发酵处理工艺，通过优化物料配比进行中试。以贵阳市新庄一期污水处理厂含水率在60%左右的低温干化污泥为主要原料，添加总量约13%的辅料和返混料。发酵过程中记录温度和产品主要指标，结果表明，工艺改良后深度脱水污泥在大幅减少物料添加量、减小占地的情况下，可进行正常的好氧发酵，同时达到加速升温、缩短发酵周期的效果。
- 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.
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