Department of Civil Engineering, Walchand College of Engineering, Sangli, Maharashtra, India.
Int J Phytoremediation. 2021;23(13):1342-1355. doi: 10.1080/15226514.2021.1895720. Epub 2021 Mar 11.
The conventionally used constructed wetlands require modification/s to minimize clogging problems and space requirement. In this study, a field-scale baffled and biorack hybrid constructed wetland (BBHCW) was developed as a part of 42 KLD decentralized wastewater treatment (DWT) system at Walchand College of Engineering, Sangli (M.S.), India for domestic wastewater. Brickbats were used as support medium in the baffled portion and corrugated sheets in biorack. Mixed vegetation of and was used in both baffled and biorack portions. BBHCW was operated under the dynamic conditions of flow (0.60-9.89 m/m day) and strength (0.12-2.12 kg COD/m day) for 8 months. The performance was assessed for the removal of organic carbon and nitrogen with and without recirculation of treated effluent. Tracer studies showed that the hydraulic efficiency was satisfactory. COD, BOD, and TKN removal is possible to an extent of 26.30 ± 1.36, 29.08 ± 2.43, and 19.39 ± 2.27%, respectively, under dynamic conditions. Recirculation enhances the removal efficiency of COD by 5.00-10.00%. However, TKN removal was not significant with or without recirculation. Morphological study showed that vegetation growth was well supported in BBHCW. The discarded corrugated sheets in BR and brickbats in BSFW are the most appropriate low-cost options. The clogging problem is reduced significantly. BBHCW is sturdy enough to absorb shock loading and space requirement can be reduced by judicious choice of HLR and OLR. BBHCW is an alternative to conventionally used sub-surface constructed wetland as a part of DWT. Novelty statementDevelopment of newly configured baffled and biorack hybrid dual-species constructed wetland (BBHCW) for field scale application.Use of discarded brickbat and cement sheets as a new support medium and bioracks.Performance assessment of field-scale BBHCW for the removal of organic carbon (expressed as COD and BOD), and nitrogen (expressed as TKN) from domestic wastewater under highly dynamic conditions induced by fluctuating hydraulic loading rate (0.60-9.89 m/m day) and organic loading rate (0.12-2.12 kg COD/m day).
传统的人工湿地需要进行改造以最小化堵塞问题和空间需求。在这项研究中，我们开发了一种现场规模的带挡板和生物架的混合人工湿地（BBHCW），作为印度萨利克的 Walchand 工程学院的 42 KLD 分散式废水处理（DWT）系统的一部分，用于处理生活污水。挡板部分使用砖渣作为支撑介质，生物架部分使用波纹板。挡板和生物架部分均使用 和 的混合植被。BBHCW 在流量（0.60-9.89 m/m 天）和强度（0.12-2.12 kg COD/m 天）的动态条件下运行了 8 个月。评估了在有/无处理后回流的情况下，有机碳和氮的去除效果。示踪剂研究表明水力效率令人满意。在动态条件下，COD、BOD 和 TKN 的去除率分别可达 26.30±1.36%、29.08±2.43%和 19.39±2.27%。回流可将 COD 的去除效率提高 5.00-10.00%。然而，无论是否回流，TKN 的去除效果都不明显。形态学研究表明，BBHCW 中植被生长得到了很好的支持。在 BR 中废弃的波纹板和 BSFW 中的砖渣是最合适的低成本选择。堵塞问题得到了显著缓解。BBHCW 足够坚固，可以承受冲击负荷，通过合理选择 HLR 和 OLR，可以减少空间需求。BBHCW 是传统地下人工湿地的替代方案，可作为 DWT 的一部分。创新点开发了一种新配置的带挡板和生物架的混合双物种人工湿地（BBHCW），用于现场规模应用。使用废弃的砖渣和水泥板作为新型支撑介质和生物架。在波动水力负荷率（0.60-9.89 m/m 天）和有机负荷率（0.12-2.12 kg COD/m 天）诱导的高度动态条件下，对现场规模的 BBHCW 去除生活污水中的有机碳（以 COD 和 BOD 表示）和氮（以 TKN 表示）的性能进行评估。
