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Cultivation of Pleurotus ostreatus Mushroom on Substrates Made of Cellulose Fibre Rejects: Product Quality and Spent Substrate Fuel Properties
Waste and Biomass Valorization ( IF 3.2 ) Pub Date : 2020-12-03 , DOI: 10.1007/s12649-020-01311-y
Alejandro Grimm , Lill Eilertsen , Feng Chen , Renyuan Huang , Lars Atterhem , Shaojun Xiong

Abstract

This paper explores an alternative valorisation method for high-moisture content waste streams from the pulp and paper industry. Cellulose fibre rejects from industrial-scale recycling/pulping of waste paper was used as an ingredient in substrates for cultivation of Pleurotus ostreatus, commonly known as oyster mushroom. Three substrates with 40, 60, and 80 wt% fibre rejects were tested, and a conventional substrate formula based on birch (Betula ssp.) sawdust was used for comparison. The spent mushroom substrate (SMS) fuel characteristics were assessed through ashing procedures. Mycelium growth was faster on substrates based on fibre rejects. The average biological efficiencies of the first flush of fruit bodies were between 29 and 36% compared to 42% for birch sawdust substrates. The fruit bodies had good nutritional values, i.e., crude protein (22–25 wt% d.b.), crude fat (3–3.5 wt% d.b.), crude fibre (8–10 wt% d.b.), and carbohydrates (57–62 wt% d.b.). The concentrations of heavy metals, 5–10 µg/kg Pb, 19–28 µg/kg Cd, 5–6 µg/kg Hg, and 26–53 µg/kg As were well below the limit values for food products set in EU regulations. The SMS could be used as fuel for direct combustion or co-combusted with other biomasses.

Graphic Abstract



中文翻译:

在纤维素纤维废料制成的基质上栽培平菇蘑菇:产品质量和用过的基质燃料性质

摘要

本文探讨了一种用于制浆造纸行业中高水分含量废物流的替代性增值方法。工业规模的废纸回收/制浆过程中产生的纤维素纤维废料被用作平菇(通常被称为牡蛎蘑菇)的栽培基质。测试了三种具有40%,60%和80%的纤维废料的基材,并基于桦木(Betulassp。)锯末用于比较。通过灰化程序评估了蘑菇末基质(SMS)的燃料特性。在基于纤维废料的基质上,菌丝体的生长更快。第一次冲洗子实体的平均生物效率在29%至36%之间,而桦木锯末基质的平均生物效率为42%。子实体具有良好的营养价值,即粗蛋白(22–25 wt%db),粗脂肪(3–3.5 wt%db),粗纤维(8–10 wt%db)和碳水化合物(57–62 wt % D b)。重金属,5–10 µg / kg铅,19–28 µg / kg镉,5–6 µg / kg汞和26–53 µg / kg砷的浓度远低于欧盟设定的食品限值规定。SMS可用作直接燃烧的燃料或与其他生物质共燃。

图形摘要

更新日期:2020-12-03
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