大型海藻巨藻属和石莼属及其与剩余活性污泥共消化的生物甲烷潜力。

Biomethanation potential of macroalgae Ulva spp. and Gracilaria spp. and in co-digestion with waste activated sludge.

机构信息

IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, 4710-057 Braga, Portugal.

出版信息

Bioresour Technol. 2012 Jun;114:320-6. doi: 10.1016/j.biortech.2012.03.011. Epub 2012 Mar 10.

DOI:10.1016/j.biortech.2012.03.011

PMID:22459959

Abstract

Biochemical methane potential of four species of Ulva and Gracilaria genus was assessed in batch assays at mesophilic temperature. The results indicate a higher specific methane production (per volatile solids) for one of the Ulva sp. compared with other macroalgae and for tests running with 2.5% of total solids (196±9 L CH(4) kg(-1)VS). Considering that macroalgae can potentially be a post treatment of municipal wastewater for nutrients removal, co-digestion of macroalgae with waste activated sludge (WAS) was assessed. The co-digestion of macroalgae (15%) with WAS (85%) is feasible at a rate of methane production 26% higher than WAS alone without decreasing the overall biodegradability of the substrate (42-45% methane yield). The use of anoxic marine sediment as inoculum had no positive effect on the methane production in batch assays. The limiting step of the overall anaerobic digestion process was the hydrolysis.

摘要

在中温条件下，采用批式实验评估了 4 种石莼属和 1 种江蓠属大型海藻的生物甲烷潜能。结果表明，与其他大型海藻相比，其中 1 种石莼属海藻的单位挥发性固体产甲烷量更高，而当总固体含量为 2.5%（196±9 L CH4 kg-1 VS）时，测试结果则更佳。考虑到大型海藻有望成为市政废水的后处理技术以去除营养物质，因此评估了大型海藻与剩余活性污泥（WAS）的共消化。当 15%的大型海藻与 85%的 WAS 共消化时，甲烷产量比 WAS 单独消化提高了 26%，但并未降低基质的整体生物降解性（甲烷产率为 42-45%）。采用缺氧海洋沉积物作为接种物对批式实验中的甲烷产量没有积极影响。整个厌氧消化过程的限速步骤是水解。