González-Suárez Aimee, Pereda-Reyes Ileana, Oliva-Merencio Deny, Suárez-Quiñones Teresa, José da Silva Ariovaldo, Zaiat Marcelo
Study Center for Process Engineering (CIPRO) Universidad Tecnológica de La Habana "José Antonio Echeverría" (Cujae) Marianao Havana Cuba.
Study Center for Renewable Energy Technology (CETER) Universidad Tecnológica de La Habana "José Antonio Echeverría" (Cujae) Marianao Havana Cuba.
Eng Life Sci. 2018 May 28;18(8):562-569. doi: 10.1002/elsc.201700018. eCollection 2018 Aug.
The influence of the bonding form distribution of Fe, Ni, Co and Mn and their potential bioavailability during the anaerobic degradation of maize straw was investigated. Two reactors were operated over 117 days at 37°C and different dosage strategies of mineral were studied in reactor (R2). Control reactor (R1) was metal-limited over time. mineral supplementation (1 g L) once a week reported the highest methane yield (257 mL g VS) with 30% of increment. Ni and Co predominated in their oxidizable bonding forms and Fe mainly existed as residual and oxidizable fractions. The potential bioavailability (Mn ˃˃ Co ≈ Ni ˃ Fe) of R2 was higher comparing to R1. Metal deprivation in R1 led to depletion of both sequential extraction fractions and total metal concentrations until the end of the process. This study confirmed that the dosage strategy of mineral has a stimulatory effect on methane production from crop maize waste.
研究了铁、镍、钴和锰的键合形态分布及其在玉米秸秆厌氧降解过程中潜在生物有效性的影响。两个反应器在37°C下运行117天，并在反应器（R2）中研究了不同的矿物质添加策略。对照反应器（R1）随着时间的推移处于金属限制状态。每周补充一次矿物质（1 g/L）时，甲烷产量最高（257 mL/g VS），增加了30%。镍和钴以可氧化键合形态为主，铁主要以残留和可氧化部分存在。与R1相比，R2的潜在生物有效性（锰>>钴≈镍>铁）更高。R1中的金属缺乏导致连续萃取部分和总金属浓度在过程结束前耗尽。本研究证实，矿物质的添加策略对作物玉米废弃物的甲烷产生具有刺激作用。
