Elissen Hellen J H, Hendrickx Tim L G, Temmink Hardy, Buisman Cees J N
Department of Environmental Technology, Wageningen University, P.O. Box 8129, Wageningen 6700 EV, The Netherlands.
Water Res. 2006 Dec;40(20):3713-8. doi: 10.1016/j.watres.2006.08.029. Epub 2006 Oct 27.
Biological waste water treatment results in the production of waste sludge. The final treatment option in The Netherlands for this waste sludge is usually incineration. A biological approach to reduce the amount of waste sludge is through predation by aquatic worms. In this paper we test the applicability of a new reactor concept for sludge reduction by the aquatic worm Lumbriculus variegatus. In this reactor concept the worms are immobilized in a carrier material. In sequencing batch experiments, the sludge breakdown in the predation reactor is compared to sludge breakdown in a blank reactor (i.e. without worms). Predation by the worms results in a distinct sludge reduction, which is almost three times higher than in the blank experiment. The worm faeces that are produced after sludge predation have a sludge volume index (SVI) that is approximately half that of the initial waste sludge. Due to the configuration of the predation reactor, waste sludge, worm faeces and worms are separated, which is beneficial to further processing. The obtained results show that the proposed reactor concept has a high potential for use in large-scale sludge processing.
生物废水处理会产生剩余污泥。在荷兰，这种剩余污泥的最终处理方式通常是焚烧。一种减少剩余污泥量的生物学方法是通过水生蠕虫的捕食作用。在本文中，我们测试了一种新型反应器概念对于通过颤蚓属水生蠕虫减少污泥量的适用性。在这种反应器概念中，蠕虫被固定在载体材料中。在序批式实验中，将捕食反应器中的污泥分解情况与空白反应器（即没有蠕虫的反应器）中的污泥分解情况进行比较。蠕虫的捕食作用导致了显著的污泥减量，这几乎是空白实验中污泥减量的三倍。污泥被蠕虫捕食后产生的蠕虫粪便的污泥体积指数（SVI）约为初始剩余污泥的一半。由于捕食反应器的结构，剩余污泥、蠕虫粪便和蠕虫得以分离，这有利于进一步处理。所获得的结果表明，所提出的反应器概念在大规模污泥处理中具有很高的应用潜力。
