Performance of a Constructed Wetland‐Pond System for Treatment and Reuse of Wastewater from Campus Buildings

Abstract

A constructed wetland-pond system consisting of two freewater-surface-flow (FWS) wetland cells, a scenic pond, and a slag filter in series was used for reclamation of septic tank effluent from a campus building. The results show that FWS wetlands effectively removed major pollutants under a hydraulic loading rate between 2.1 and 4.2 cm/d, with average efficiencies ranging from 74 to 78% for total suspended solids, 73 to 88% for 5-day biochemical oxygen demand, 42 to 49% for total nitrogen, 34 to 70% for total phosphorous, 64 to 79% for total coliforms, and 90 to 99.9% for Escherichia coli. After passing through the scenic pond and slag filter, the reclaimed water was used for landscape irrigation. There were a variety of ornamental plants and aquatic animals established in the second FWS cell and scenic pond with good water quality, thus enhancing landscape and ecology amenity in campuses. Water Environ. Res., 78, 2369Res., 78, (2006.

Enhanced Long-Term Nitrogen Removal and Its Quantitative Molecular Mechanism in Tidal Flow Constructed Wetlands

“…Liu et al (2013) reported TN removal rates of 0.69–1.2 g/m 2 ·d for nonaerated VF CWs . Maltais-Landry et al (2009) and Zhang et al (2010) achieved averaged TN removal rates in aerated CWs at 0.8 and 5.0 g/m 2 ·d, respectively. , Other similar studies reported typical TN removal rates ranging from 0.9 to 4.6 g/m 2 ·d. ,, Thus, our single-stage TF CWs exhibited promising performance and operational flexibility for nitrogen removal (both NH 4 + and NO 3 – ), allowing TF CWs to complement and even replace hybrid CW systems in field applications, while providing more efficient space utilization and lower capital costs.…”

“…36,37 Other similar studies reported typical TN removal rates ranging from 0.9 to 4.6 g/m 2 •d. 28,38,39 Thus, our single-stage TF CWs exhibited promising performance and operational flexibility for nitrogen removal ( + and TN by 19 ± 5.4% and 35 ± 5.1%, respectively. The negligible nitrification observed in Figure 2a suggests that the biological NH 4 + transformation contributes little to NH 4 + removal due to the negative impact of the low influent temperature (15.1−16.2 °C) on nitrifying bacteria, which are slow-growing chemoautotrophic organisms with optimal growing and functioning conditions above 30 °C.…”

Effects of a constructed wetland and pond system upon shallow groundwater quality

“…In contrast, very little research effort has been devoted to investigating the removal of contaminants from wastewater with CPs. Ou et al (2006) investigated the performance of a CW-CP system for treatment and reuse of wastewater from campus buildings. These authors found that the percent removals of total suspended solids, total nitrogen, and total phosphorus are, respectively, 24, 87, and 62 % with the pond.…”

The Analysis of Wastewater Composition and Characteristic in a Northern University of China

“…Therefore, the study on pollutant emission laws of campus sewage coming from different source. According to the prior pollution factors to design different treatment process, and choose appropriate sewage treatment technology to reduce the pollution load and the cost of follow-up treatment [5][6][7]. Due to the difference between geographical areas and climate, the student's food habit, bathing and activities at different frequencies are different in domestic universities.…”