Department of Water and Environmental Studies, Linköping University, Linköping, Sweden.
Environ Technol. 2011 Oct;32(13-14):1559-71. doi: 10.1080/09593330.2010.543932.
The methane potential of activated sludge from six Swedish pulp and paper mills was evaluated. The methane production potential of sludge samples ranged from 100-200 NmL CH4 g(-1) volatile solids (VS) and for four of the six sludge samples the potential exceeded 170 NmL CH4 g(-1) VS. The effects of sludge age and dewatering on the methane production potential were evaluated. The effects of enzymatic and ultrasonic pre-treatment on the digestibility of sludge were also investigated, but energy or enzyme inputs in viable ranges did not exert a detectable, positive effect. Long-term, semi-continuous trials with sludge from two of the mills were also conducted in attempts to develop stable biogas production at loading rates up to 4 g VS L(-1). Cobalt addition (0.5 mg L(-1)) was here found to positively affect the turnover of acetate. High viscosity was a problem in all the experimental reactors and this limited the organic loading rate.
评估了来自瑞典六家纸浆和造纸厂的活性污泥的甲烷生成潜力。污泥样品的甲烷生成潜力范围为 100-200 NmL CH4 g(-1) 挥发性固体 (VS)，其中四个污泥样品的潜力超过了 170 NmL CH4 g(-1) VS。评估了污泥龄和脱水对甲烷生成潜力的影响。还研究了酶和超声预处理对污泥消化性的影响，但在可行范围内的能量或酶投入并没有产生可检测的积极效果。还对来自其中两个工厂的污泥进行了长期的半连续试验，试图在高达 4 g VS L(-1) 的负荷率下稳定产生沼气。在此发现添加钴（0.5 mg L(-1)) 可积极影响乙酸盐的转化。在所有实验反应器中都存在高粘度问题，这限制了有机负荷率。
