摘要
为了研究碱处理污泥厌氧发酵产氢情况,对原污泥进行不同p H值的碱预处理。结果表明,在所考察的碱性预处理p H值范围(9~12)内,碱预处理p H值越大,对耗氢菌的抑制作用及溶胞作用越强,相应的产氢量和产氢率也最高。经过p H值=12碱性预处理后在最佳初始p H值下厌氧发酵产氢,其污泥累积产氢量为5.45 m L/g DS。在此过程中,蛋白质降解量为9 395.59mg/L,总糖降解量为2 446.63 mg/L,以蛋白质降解为主;TVFA及NH_4^+-N浓度呈不断上升趋势,TVFA中乙酸比例最高。
A series of batch tests were conducted to investigate the optimal operation conditions to maximize the hydrogen production using the alkaline pretreated sludge at pH = 9, 10, 11, and 12. The optimal alkaline pretreatment pH was 12. Using the alkaline sludge pretreated at pH = 12 produced the highest amount of hydrogen, which was 5.45 mL/gDS. Alkaline pretreatment was beneficial to lysis, also increased the concentrations of soluble saccharide and protein in sludge, and thus accelerated the hydro- gen production from the anaerobic fermentation. During the anaerobic fermentation, the main substrate degraded was protein at the rate of 9 395.59 mg/L, while the saccharide was at 2 446.63 mg/L. Mean- while, it was shown that the concentration of total volatile fatty acids （TVFA） and ammonia nitrogen in- creased during the fermentation. The main component of the TVFA was acetic acid.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第23期94-97,共4页
China Water & Wastewater
基金
福建省科技厅重大专项(2014YZ0002-1)
福建省自然科学基金资助项目(2015J01187)
福建省科技厅软科学研究计划项目(2014R0041)
关键词
污泥
碱处理
厌氧发酵
氢气
municipal sludge
alkaline pretreatment
anaerobic fermentation
hydrogen
