功能性木质生物质环境材料的研究现状与展望

以森林为主体的木质生物质是一种"再生可能的、来源于生物的有机资源".生物质资源代替化石资源是历史发展的必由之路.本文集中讨论利用木质生物质资源,通过生物化学、热化学变换方法,制备功能性环境材料的技术路线等问题.     

褐煤生物转化高效菌株的研究及其发展前景

主要从褐煤的特点及其微生物可降解性、降解褐煤的微生物菌种的选择、筛选和开发等方面进行归纳总结,对褐煤微生物转化高效菌株的研究现状及其进展进行了综述,指出寻找并开发转化褐煤的高效菌株是今后褐煤生物转化技术的重要研究方向。     

Formulation of New Media from Dairy and Brewery Wastes for a Sustainable Production of DHA-Rich Oil by Aurantiochytrium mangrovei

Mozzarella stretching water (MSW) is a dairy effluent generated from mozzarella cheese production that does not have a real use and is destined to disposal, causing environmental problems and representing a high disposal cost for dairy producers. Spent brewery yeast (SBY) is another promising food waste produced after brewery manufacturing that could be recycled in new biotechnological processes. Aurantiochytrium mangrovei is an aquatic protist known as producer of bioactive lipids such as omega 3 long chain polyunsaturated fatty acids (ω3 LC-PUFA), in particular docosahexaenoic acid (DHA). In this work MSW and SBY have been used to formulate new sustainable growth media for A. mangrovei cultivation and production of DHA in an attempt to valorize these effluents. MSW required an enzymatic hydrolysis to enhance the biomass production. The new media obtained from hydrolysed MSW was also optimized using response surface methodologies, obtaining 10.14 g L⁻¹ of biomass in optimized medium, with a DHA content of 1.21 g L⁻¹.     

金针菇多因子栽培效应的研究

该项研究，用正交试验的方法证明，以稻草糠为主要原料栽培金针菇时，添加３０％的麦麦，３％的黄豆粉、适量的糖和矿物元素效果较佳，生物转化率可达９０％以上。然后又以正交试验中的最佳栽培基为对照，再分别用杂木质，玉米芯，棉籽壳等代替其中的稻草糠，比较了几种主要原料对金针菇的栽培效果。试验结果表明，以棉籽壳、玉米芯为主要原料的两种培养基菌丝生长较浓白、粗壮，但产量仍以稻糠为主要原料的培养基最高，棉籽壳交之，     

酵母发酵马铃薯淀粉废弃物产单细胞蛋白的能力强化

以马铃薯生产淀粉产生废弃物为发酵培养基,选用酿酒酵母(Saccharomy cescerevisiae)与产朊假丝酵母(Candida utilis)为原始菌株,经紫外诱变后,筛选出两株蛋白产量显著提高并遗传稳定的突变株:S57和U112,蛋白产量均为8.43 g·L-1。将两种菌种混合比例设定为1??1,按照1%(V/V)进行接种,在葡萄糖浓度为35 g·L-1培养基中对两株菌种进行共培养,利用响应面分析法对其发酵产蛋白能力进行优化,研究p H、温度及转速。对结果进行分析,确定在培养基初始p H 7.7,培养温度为27.7℃且转速为187 r·min-1时,蛋白产量达到理论最大值,为9.02 g·L-1。验证试验显示,蛋白产量达到(9.19±0.05)g·L-1,证明模型可信,COD去除率达到80%。