Bahreini Gholamreza, Nazari Laleh, Ho Dang, Flannery Christopher C, Elbeshbishy Elsayed, Santoro Domenico, Nakhla George
Department of Civil and Environmental Engineering, Western University, London, ON, N6A 5B9, Canada.
Department of Chemical and Biochemical Engineering, Western University, London, ON, N6A 5B9, Canada.
Bioresour Technol. 2020 Jun;305:123071. doi: 10.1016/j.biortech.2020.123071. Epub 2020 Feb 22.
This research showed the interrelated impact of cellulase enzyme, temperature, and SRT on enhancement of primary and rotating belt filter (PS, RBF) sludges fermentation. SRTs of 1, 2, and 4-days were tested at 25 °C and 35 °C. Enzymatic enhancement was examined using three different doses of enzyme (i.e. 0.5%, 1%, and 1.5% of the total solids in the feed). The results showed a positive impact of enzyme dose as well as temperature and SRT on VFA and soluble COD production. For the RBF sludge, enzyme addition enhanced the VFA yield of fermentation at room temperature (25 °C) from 52-103 mgCOD/g VS to 93-188 mgCOD/g VS, as compared with increase from 78-192 to 87-202 mgCOD/gVS in PS. Intensification of the fermentation process, particularly for the cellulose-rich RBF sludge, by enzyme addition confirms process viability as an alternative to the extraneous carbon sources for biological nutrient removal in wastewater treatment plants.
这项研究表明了纤维素酶、温度和污泥停留时间（SRT）对增强初沉污泥和回转带式过滤污泥（PS、RBF）发酵的相互关联影响。在25℃和35℃下测试了1天、2天和4天的污泥停留时间。使用三种不同剂量的酶（即进料中总固体的0.5%、1%和1.5%）来检验酶促增强效果。结果表明，酶剂量以及温度和污泥停留时间对挥发性脂肪酸（VFA）和可溶性化学需氧量（COD）的产生有积极影响。对于RBF污泥，添加酶使室温（25℃）下发酵的VFA产量从52 - 103mgCOD/g挥发性固体（VS）提高到93 - 188mgCOD/g VS，而PS污泥则从78 - 192mgCOD/g VS提高到87 - 202mgCOD/g VS。通过添加酶强化发酵过程，特别是对于富含纤维素的RBF污泥，证实了该工艺作为废水处理厂生物营养物去除中外源碳源替代品的可行性。
