Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, PR China.
Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Agricultural Technology Popularization Center of Zhejiang Province, Hangzhou 310020, PR China.
J Environ Manage. 2015 Sep 15;161:131-136. doi: 10.1016/j.jenvman.2015.06.029. Epub 2015 Jul 9.
In this study, concentrated monosodium glutamate waste (CMGW) was proposed as a conditioning agent to adjust acidity and decrease ammonia (NH3) volatilization in thermophilic aerobic composting based on two incubation experiments. The results showed that with the addition of CMGW, NH3 volatilization of compost mixture under high temperature phase decreased significantly and pH met the current national standard within 5.5-8.5. When CMGW dosage increased to 2% (v/w), the decrease in NH3 volatilization was as high as 78.9%. This effect was enhanced by repeated application of CMGW. Furthermore, although the electrical conductivity increased with the application of CMGW, both the germination index and the microbial respiration of compost mixture implied that CMGW had no negative effects on the maturity of compost, instead, a comprehensive maturity might be accelerated. It was concluded that CMGW was an optional conditioning agent for thermophilic aerobic composting of livestock manure in regards to adjusting acidity and preventing nitrogen loss from NH3 volatilization.
在这项研究中，提出了利用浓谷氨酸废液（CMGW）作为调理剂来调节酸度和减少高温好氧堆肥中氨（NH3）挥发。通过两个培养实验得出以下结果：在高温阶段，随着 CMGW 的添加，堆肥混合物中 NH3 的挥发显著减少，pH 值在 5.5-8.5 之间，符合现行国家标准。当 CMGW 用量增加到 2%（v/w）时，NH3 的挥发减少高达 78.9%。重复应用 CMGW 可以增强这种效果。此外，尽管 CMGW 的应用会增加电导率，但堆肥混合物的发芽指数和微生物呼吸表明，CMGW 对堆肥的成熟没有负面影响，反而可能加速综合成熟。综上所述，CMGW 是一种调节酸度和防止 NH3 挥发损失的可选调理剂，可用于调节酸度和防止氮素损失。
