Singhal V, Rai J P N
Department of Environmental Sciences, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145, India.
Bioresour Technol. 2003 Feb;86(3):221-5. doi: 10.1016/s0960-8524(02)00178-5.
The paper reports on the biogas production from water hyacinth (Eichhornia crassipes) and channel grass (Vallisneria spiralis) employed separately for phytoremediation of lignin and metal-rich pulp and paper mill and highly acidic distillery effluents. These plants eventually grow well in diluted effluent up to 40% (i.e., 2.5-times dilution with deionized water) and often take up metals and toxic materials from wastewater for their metabolic use. Slurry of the two plants used for phytoremediation produced significantly more biogas than that produced by the plants grown in deionized water; the effect being more marked with plants used for phytoremediation of 20% pulp and paper mill effluent. Biogas production from channel grass was relatively greater and quicker (maximum in 6-9 days) than that from water hyacinth (in 9-12 days). Such variation in biogas production by the two macrophytes has been correlated with the changes in C, N and C/N ratio of their slurry brought by phytoremediation.
该论文报道了分别利用凤眼莲（Eichhornia crassipes）和苦草（Vallisneria spiralis）对富含木质素和金属的制浆造纸厂废水以及高酸性酿酒厂废水进行植物修复时产生沼气的情况。这些植物最终能在稀释至40%的废水（即与去离子水按1:2.5稀释）中良好生长，并且常常从废水中吸收金属和有毒物质以供其新陈代谢使用。用于植物修复的这两种植物的泥浆产生的沼气明显多于在去离子水中生长的植物产生的沼气；对于用于修复20%制浆造纸厂废水的植物，这种效果更为显著。苦草产生沼气的量相对更多且速度更快（在6 - 9天达到最大值），而凤眼莲产生沼气的时间为9 - 12天。这两种大型植物产生沼气的这种差异与植物修复使其泥浆中的碳、氮和碳氮比发生的变化有关。
