外加铁盐对污泥高温好氧堆肥效果的影响  

Effect of Additional Dosage of Ferric Salts on Aerobic Thermophilic Composting of Sewage Sludge

作　　者：梁佳芸 寿宗奇[1] 袁海平[1] 朱南文[1] Liang Jiayun;Shou Zongqi;Yuan Haiping;Zhu Nanwen(School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240, Chin)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《净水技术》2017年第11期33-39,共7页Water Purification Technology

基　　金：上海市科学技术委员会项目(14DZ1207306;14DZ1207307)

摘　　要：针对污泥堆肥初期挥发性脂肪酸(VFA)积累会对微生物活性产生的抑制问题,提出投加铁盐以解除抑制,加快堆肥反应进程。研究结果表明,投加硝酸铁和氯化铁对污泥高温好氧堆肥具有促进作用,其中,投加硝酸铁处理的污泥挥发性固体(VS)去除率达到28.0%,比对照提高28.4%,升温速率、最高温度均高于对照,总挥发性脂肪酸(TVFA)浓度明显降低,始终低于15 g/kg DS(干基);堆体的水溶性COD(SCOD)和水溶性铵态氮(NH_4^+-N)浓度均低于对照。投加氯化铁处理的污泥VS去除率达到26.0%,比对照提高19.3%。投加柠檬酸铁和硫酸铁处理的污泥VS去除率、升温速率、最高温度无明显提高或低于对照,堆肥过程受抑制。Since excessive volatile fatty acid （VFA） inhibits microbial activity at the beginning of aerobic thermophilic composting of sewage sludge, ferric salts were employed in this study to disinhibit excessive VFA and accelerate the process of composting. Results showed that both ferric nitrate and ferric chloride were effective. Thereinto, the removal efficiency of sludge volatile solid （V S ） by ferric nitrate treatment achieved 28.0%,increased by 28.4% compared to the contrast. The addition of ferric nitrate also resulted in better temperature rising rate and maximum temperature than those of the contrast. Additionally, concentration of total volatile fatty acid （TVFA） was less than 15 g/kg DS （Dry Sludge） during the composting process,which was significantly decreased. Lower soluble COD （SCOD） and soluble NH4 - N were obtained by the treatment. Furthermore, the removal efficiency of VS by ferric chloride treatment achieved 26.0%,increased by 19.3% compared to the contrast. However, the VS removal, temperature rising rate and maximum temperature by ferric citrate and ferric sulfate treatment exhibited no obvious increase,or even lower than the contrast, indicating the inhibition during composting process.

关 键 词：高温好氧堆肥 污泥 挥发性脂肪酸 挥发性固体 铁盐 

分 类 号：X705[环境科学与工程—环境工程]