Simultaneous sludge degradation, desalination and bioelectricity generation in two-phase microbial desalination cells
Simultaneous sludge degradation, desalination and bioelectricity generation in two-phase microbial desalination cells
复制标题
两相微生物脱盐池同时进行污泥降解、脱盐和生物发电
DOI：
10.1016/j.cej.2018.12.063
复制
发表时间：
2018
影响因子：
15.1
通讯作者：
Xiaolin Na
中科院分区：
文献类型：
--
作者：
Fanyu Meng;Qingliang Zhao;Zhen Zheng;Liangliang Wei;Kun Wang;Junqiu Jiang;Jing Ding;Xiaolin Na
固相生物电化学系统的发明为同步脱水污泥堆肥、脱盐和生物发电提供了一种很有前途的方法。然而，低功率密度和阳极盐化是SPBES的常见问题。两相微生物脱盐池（TPMDC）通过增设浓缩室，实现了盐水和脱水污泥的同时脱盐。实验结果表明，在TPMDC稳定运行期间，不同浓度盐溶液的Dsaltin 3d分别为6.00 ± 0.05%（35 g L-1）、10.75 ± 0.76%（10 g L-1）和19.80 ± 0.64%（2 g L-1）。运行200 d后，阳极泥的D盐达到31.63 ± 1.26%，有机物去除率达到32.70 ± 1.67%。在开路电压（OCV）为0.998 ± 0.011 V时，在52 d时产生Pmax（1.97 ± 0.33 W m−3）。经生物电化学稳定后，提高了脱水污泥土地利用的可行性。脱水后污泥腐殖化程度显著提高，速效氮、速效磷、速效钾含量增加，重金属和类金属转化为稳定的残留形态，污泥的植物毒性降低。BES作为脱水污泥堆肥的预处理具有很大的潜力。
The invention of solid phase bioelectrochemical systems (SPBESs) provides a promising method for synchronous dehydrated sludge compost, desalination and bioelectricity generation. However, low power density and anodic salinization are common problems in SPBESs. A two-phase microbial desalination cell (TPMDC) could achieve simultaneous desalination of saline solution and dehydrated sludge by adding concentration chambers. Experimental results indicated that theDsaltin 3 d for different concentration saline solutions were 6.00 ± 0.05% (35 g L−1), 10.75 ± 0.76% (10 g L−1), and 19.80 ± 0.64% (2 g L−1) respectively during the stable operation period of TPMDC. TheDsaltof anodic sludge reached 31.63 ± 1.26% after 200-day operation, and the removal of organic matter was up to 32.70 ± 1.67%. ThePmax(1.97 ± 0.33 W m−3) was produced on 52 d with open circuit voltage (OCV) of 0.998 ± 0.011 V. After bioelectrochemical stabilization, the feasibility of dehydrated sludge land application was improved. Specifically, the dehydrated sludge humication level significantly enhanced, the contents of available nitrogen, phosphorus and potassium all increased, the heavy metals and metalloids in dehydrated sludge transferred into stable residual form, and phytotoxicity of dehydrated sludge decreased. BES as a pretreatment of dehydrated sludge composting has great potentials.