Since the 1980s, the pulp and paper industry in Finland has resulted in the accumulation of fibres in lake sediments. One such site in Lake Näsijärvi contains approximately 1.5 million m³ sedimented fibres. In this study, the methane production potential of the sedimented fibres (on average 13% total solids (TS)) was determined in batch assays. Furthermore, the methane production from solid (on average 20% TS) and liquid fractions of sedimented fibres after solid-liquid separation was studied. The sedimented fibres resulted in fast methane production and high methane yields of 250±80 L CH₄/kg volatile solids (VS). The main part (ca. 90%) of the methane potential was obtained from the solid fraction of the sedimented fibres. In addition, the VS removal from the total and solid sedimented fibres was high, 61−65% and 63−78%, respectively. The liquid fraction also contained a large amount of organics (on average 8.8 g COD/L), treatment of which also has to be considered. The estimations of the methane production potentials in the case area showed potential up to 40 million m³ of methane from sedimented fibres.

自1980年代以来，芬兰的制浆造纸业导致纤维在湖泊沉积物中的积累。Näsijärvi湖中的一个这样的站点包含约150万m ^3的沉积纤维。在这项研究中，通过分批测定确定了沉淀纤维的甲烷生产潜力（平均总固体含量（TS）为13％）。此外，还研究了固液分离后沉降纤维的固体（平均TS为20％）和液体部分的甲烷产量。沉积的纤维可快速产生甲烷，并具有250±80 L CH _4的高甲烷产率/ kg挥发性固体（VS）。甲烷潜力的主要部分（约90％）是从沉降纤维的固体部分中获得的。此外，从总沉降纤维和固体沉降纤维中去除的VS较高，分别为61-65％和63-78％。液体馏分还包含大量有机物（平均8.8 g COD / L），也必须考虑对其进行处理。在的情况下区域中的甲烷产生电势的估计表明潜在高达40000000米³从沉降纤维的甲烷。