The degradation performance of organic matters and microorganism abundance variations of two horizontal subsurface flow constructed wetlands (HSSFCWs) with different influent COD/N ratios and a spray aeration system were investigated. Oxygen-enriched influent water was beneficial to enhance the abilities of nitrification and …Web

Performance of horizontal sub-surface flow constructed wetlands with different flow patterns using dual media for low-strength municipal wastewater: a case of …Web

A pilot-scale multistage constructed wetland-pond (MCWP) system with a "pre-ecological oxidation pond, two-stage horizontal subsurface flow constructed wetland (HSCW) and surface flow constructed wetland (SFCW) as the core and postsubmerged plant pond" as the process was used to treat actual polluted river water in the field, and …Web

In turn, subsurface flow wetlands are divided into horizontal flow and vertical flow, depending on the hydraulic regime (Kadlec and Wallace, 2009, Fonder and Headley, 2013). The wetland design influences the dominating environmental conditions inside the wetland, which in turn influences degradation processes (Imfeld et al., 2009).Web

Ibuprofen and naproxen removal from domestic wastewater using a Horizontal Subsurface Flow Constructed Wetland coupled to Ozonation. Ecol. Eng. (2019) ... The preparation, characterization and adsorption performance of the phosphate-modified hydrochar (P-hydrochar) for Pb(II) and ciprofloxacin removal are investigated. Pb(II) and …Web

Highlights Modeling of BOD removal in horizontal subsurface flow constructed wetlands. Use of MODFLOW-MT3DMS set of codes – validation with experimental data. Evaluation of first-order decay coefficient λ. Dependence of decay coefficient λ on temperature and HRT. Scenarios for various temperature, HRT, …Web

Volume 380, Part 1, 20 December 2022, 134959 Simulating and predicting the performance of a horizontal subsurface flow constructed wetland using a fully connected neural network Pengyu Li a b, Tianlong Zheng a, Lin Li a b, Xiuyuan Lv c, …Web

These indicate feasibility of application of CWs in cold climate (Fig. 1). Indeed, the performance is questionable even in CW peers' opinion. Based on background knowledge of cold climate zone, it should be noted that free water surface CWs are significantly less effective than the subsurface flow CWs (SSF CWs) (Wittgren and …Web

This work focused on the performance of pilot-scale constructed wetlands as a sustainable wastewater treatment for treating and reusing the stormwater in the mini-reservoir situated in campus area. In this study, there were two tanks of pilot-scale CW with vertical subsurface flow (VSF) and horizontal subsurface flow (HSF) systems.Web

The horizontal subsurface flow system (HSF-CW) was designed and built as part of a hybrid constructed wetland plant (HSF-CW combined with a maturation pond) for tertiary treatment of municipal wastewater prior to reuse ... The comparison of the performance of vegetated subsurface flow wetlands and unplanted ones is not …Web

Compared with the different pollutants, the removal efficiency of subsurface flow wetlands on TN (49%) is bigger than TP (34%), but less than COD (60%). Furthermore, the higher water temperature, smaller flow velocity and bigger water depth will improve the pollutants removal performance of subsurface flow wetlands.Web

The horizontal subsurface flow comprises wastewater passing horizontally throughout the inlet to the drain site progressively through a ... Caselles-Osorio A, García J (2007) Impact of different feeding strategies and plant presence on the performance of shallow horizontal subsurface-flow constructed wetlands. Sci Total Environ …Web

To enhance eutrophic water improvement effect, three parallel lab-scale oxidation pond-vertical subsurface flow constructed wetland-stable pond combined systems with different microporous intermittent aeration positions were constructed. The purification effect of each system was determined, and the contribution rate of each part …Web

Performance of CW using Horizontal Sub surface Flow and Vertical Subsurface Flow Constructed Wetland with Thypha Angustifolia and Tube Sedge The pilot-scale of CW usi ng HSF and VSF …Web

The present study aimed to investigate the application of a multilayer quartz sand substrate horizontal subsurface flow constructed wetland (HSFCW) for campus sewage treatment. It aimed to assess the pollutant removal efficiency and anti-clogging performance under the suggested maximum organic loading rate (250 g/m 2 /d). The …Web

Concentration-based average removal efficiencies for HSSF-CW and VFCW were BOD, 77% and 83%; COD, 60% and 65%; NH 4+ –N, 67% and 84.47%; NO 3 –N, …Web

To find the effect of Hydraulic Retention Time (HRT) and seasons on the performance of horizontal subsurface flow constructed wetland (HSSF CW) in treating rural wastewater, a pilot scale unit 2.5 m × 0.4 m × 0.3 m size bed planted with Typha latifolia and Phragmites australis was operated for a 12-month duration. During the study …Web

Performance of a vertical subsurface flow constructed wetland under different operational conditions. Journal of Advanced Research, 7(5), 803–814. Article CAS Google Scholar Al-Jasser, A. O. (2011). Saudi wastewater reuse standards for agricultural irrigation: Riyadh treatment plants effluent compliance.Web

Purification Performance of Horizontal Subsurface Flow Constructed Wetland Xinyi Chen 1, Fei Zhong 2,*, Yue Chen 3, Juan Wu 1,4 and Shuiping Cheng 1,4,* 1 Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai …Web

The study revealed successful performance of the wetlands in terms of compliance with local discharge standards with respect to chemical-oxygen demand …Web

3.1 General Layout. A general vertical section of a VF downflow CW cell is presented in Fig. 2.The CW cell comprises the following: (1) a basin (cell) made of either reinforced concrete or, most often, earth covered by High-density polyethylene (HDPE) membrane (for water-proofing); (2) three or four layers of substrate material of various …Web

Some studies have evaluated the performance of subsurface gravel wetlands for treating polluted river flows (Wu et al., 2011) or runoff from plant nurseries (Huett et al., 2005); however, these applications have different pollutant concentrations, runoff timing, and influent volumes than subsurface gravel wetlands that treat …Web

Present study investigated the potential of different setups of horizontal subsurface flow constructed wetland (HSSFCW) for sewage treatment in the Indian context. ... Thalla AK, Devatha CP, Anaghs K, Sony E (2019) Performance evaluation of horizontal and vertical flow constructed wetlands as tertiary treatment option for secondary …Web

Optimizing the hydraulic performance of a baffled horizontal subsurface flow constructed wetland through computational fluid dynamics modelling - ScienceDirect Volume 351, …Web

This study aimed to design novel configurations of tidal-flow vertical subsurface flow constructed wetlands (VFCWs) for treating urban stormwater. ... Performance of a vertical subsurface flow constructed wetland under different operational conditions. J. Adv. Res., 7 (5) (2016), pp. 803-814, 10.1016/j.jare.2015.12.002.Web

Phosphorus uptake by common and ornamental plants was studied in pilot-scale horizontal subsurface flow (HSSF) constructed wetlands (CWs) with monocultures and polycultures.Three HSSF CWs were planted with monocultures of Phragmites australis (HSSF-Phr), oplectus californicus (HSSF-Sch) and Cyperus papyrus (HSSF …Web

In this context, recently Horizontal Subsurface Flow Constructed Wetlands (HSSF CW) seem to have gained attention for successful treatment of organics, …Web

Effect of oxygen supply strategy on nitrogen removal of biochar-based vertical subsurface flow constructed wetland: intermittent aeration and tidal flow. Chemosphere (2019) ... Performance assessment of horizontal and vertical surface flow constructed wetland system in wastewater treatment using multivariate principal component analysis. …Web

Ecohydrology is an international environmental science journal at the interface between ecology and hydrology publishing research related to environmental managementWeb

The influence of bed depth on the performance of aerated horizontal constructed wetlands was investigated at the pilot plant scale. Two horizontal flow subsurface constructed wetlands (HF) intensified units of different bed depth (HF1: 0.90 m and HF2: 0.55 m, 0.8 m and 0.5 m water level, respectively) were fitted with forced …Web

For example, HSSFCWs are designed to purify wastewater through anaerobic pathways (Engida et al., 2020), while anaerobic microzones have been identified in surface flow CWs (SFCWs) due to water flow layering over substrate, and vertical subsurface flow CWs (VSSFCWs) due to long-term operation causing microbial oxygen (O 2) …Web

Constructed wetland systems, as an engineered ecological system, are being increasingly employed for wastewater treatment.However, owing to the complex incentives for pollutant removal in ecological treatment systems, it is challenging to simulate and optimize the operation of constructed wetlands to advance ecological wastewater …Web