Due to its low energy density and high oxygen content, biomass is often pretreated by slow pyrolysis to form semi-char which is then fed to the entrained flow gasification reactor.

运用慢速热解方式对生物质颗粒进行预处理，半焦作为生物质气流床气化的原料，通过自动量热仪和元素分析仪对稻草和梧桐树叶热解后的半焦进行热值、元素分析。

However, the ANAMMOX reactor start-up is very slow and difficult.

但是，厌氧氨氧化菌生长缓慢，厌氧氨氧化反应器启动困难。