高VFA浓度果渣废液厌氧反应启动特性研究

研究了高VFA浓度果渣废液厌氧启动反应的操作运行工况,提出了厌氧启动反应完成时应同时满足的4项判别条件。研究成果显示:高VFA浓度果渣废液厌氧反应的启动过程可根据启动运行工况特征分4个阶段完成。在试验研究中通过跟踪计算消化液的有机碳量平衡,提出了判别厌氧反应达到完全混合状态和早于p H等常规状态指标显著变化前,发生有机酸累积的方法。试验采用尿素调控消化液中的酸碱平衡,得到厌氧启动反应达到稳定时的有机负荷为2.83 kg/(m3·d),平均产气量为658.8 L/(m3·d)。

RESEARCH ON CHARACTERISTICS IN THE ANAEROBIC STARTUP PROCESS OF HIGH VFA CONCENTRATION POMACE WASTE LIQUID

This paper studied the anaerobic startup of pomace liquid waste anaerobic process with high concentration of VFA through experiment， and four conditions should be met during the startup of anaerobic reaction． The results showed that the startup process could be divided into four stages according to the startup process． Organic acid accumulation could be detected before the indictors，like pH etc，changed notably，through the calculational analysis by track the organic carbon balance of the anaerobic in the experiment． By using the urea to control the acid-base balance of digestive juice，the organic load and the gas production was 2. 83 kg /( m3·d) and 658. 8 L/( m3·d) respectively，as the anaerobic startup process reached a stable operation．