Effect of intermittent drainage on swine wastewater treatment by marsh–pond–marsh constructed wetlands

Poach, M. E.; Hunt, P. G.; Reddy, G. B.; Stone, K. C.; Johnson, M. H.; Grubbs, A.

doi:10.1016/j.ecoleng.2007.01.003

Cited by 39 publications

(28 citation statements)

References 12 publications

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“…A difference in P removals between the two VFCWs under different idling times was not evident (Figure 7d). Poach et al [44] examined the effect of intermittent drainage on swine wastewater treatment by marsh-pond-marsh constructed wetlands, and came to the conclusion that soil oxidation was increased during drainage periods. However, at the same time they concluded that with different drainage periods, COD and SS removals were similar, which was in contrast to the findings shown in Figure 7a,b in this study.…”

Section: Effect Of Hrt and Idling Time On Nutrient Removalmentioning

confidence: 98%

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Zhu

Takala

Hiltunen

et al. 2013

Environmental Technology

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Constructed wetlands (CWs) are efficient in reducing excessive contamination from wastewaters. However, oxygen inside CW beds is frequently low especially when substrate clogging problems appear after long-term operation, and this may become a limited factor for the treatment of wastewaters. Aimed at dealing with the issue of a low oxygen content in CW systems, two laboratory-scale vertical-flow constructed wetlands (VFCWs) with and without an aeration device (called VFCW-a and VFCW-c, respectively) were designed in this study to test the contribution of supplementary aeration to the treatment of decentralized domestic wastewater. Results showed that under the intermittent operation of about 45 days, two VFCW units were successfully started up by using activated sludge as seed sludge. Compared to VFCW-c, VFCW-a had a better resistance ability to organic shock loads and its removal function could be effectively recovered within a short period after the introduction of organic shock loads. Under intermittent operation with a 12 h idling time, the ideal hydraulic retention time (HRT) of VFCW-a was 42 h, about 6 h shorter than that of VFCW-c. Likewise, under intermittent operation with 42 h HRT, the ideal idling time of VFCW-a was 12 h, still about 6 h shorter than that of VFCW-c. Under intermittent operation with HRT-42 h and an idling time of 12 h, SS, COD, TN and TP removal efficiencies in VFCW-a could reach 81.2%, 85%, 89.9% and 77.9%, respectively. The VFCW unit with supplementary aeration is an efficient innovation for the treatment of decentralized domestic wastewater.

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Section: Effect Of Hrt and Idling Time On Nutrient Removalmentioning

confidence: 98%

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Zhu

Takala

Hiltunen

et al. 2013

Environmental Technology

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“…Most investigations of swine wastewater treatment systems that have been conducted to * Corresponding author. Email: dengliangwei@caas.cn date have focused on the performance of nitrogen removal, which include ammonia volatilization, [6,7] improved nitrogen treatment [8][9][10][11] and removal of organics. [12] Both the CWs and SP show a good performance for the treatment of swine wastewater.…”

Section: Introductionmentioning

confidence: 99%

Comparison of constructed wetland and stabilization pond for the treatment of digested effluent of swine wastewater

Liu

Zheng

Deng

et al. 2014

Environmental Technology

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A laboratory-scale horizontal subsurface flow constructed wetland (HSFCW) and a stabilization pond (SP) were constructed to compare their performances on the treatment of digested effluent of swine wastewater. After 457 days of operation, the removal efficiencies of the HSFCW were as follows: chemical oxygen demand (COD), 17-54%; total phosphorus (TP), 32-45% and ammonia nitrogen [Formula: see text], 27-88%, while they were 25-55%, 31-56% and 56-98%, respectively, for the SP, with a hydraulic retention time of 54 days and hydraulic loading of 0.01 m³ m⁻² d⁻¹. The average removed loads for the HSFCW were as follows: COD, 0.25-4.33; TP, 0.01-0.11 and [Formula: see text], 0.34-2.54 g m⁻² d⁻¹, while they were 0.25-4.45, 0.02-0.13 and 0.72-2.87 g m⁻² d⁻¹, respectively, for the SP. The SP performed better than the HSFCW because the SP showed a 20% of higher removal efficiency for [Formula: see text] than the HSFCW. Especially, the COD removal rate of SP was 10% higher than the HSFCW when the influent concentration was at the lowest and highest stages. Meanwhile, given the lower costs, the SP is more suitable for the treatment of digested effluent of swine wastewater than the HSFCW.

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“…The flow could be intermittent with fill and drain mode (Poach et al 2007), continuous down flow, continuous sprinkling or erratic (Kadlec and Wallace 2008). CW may be classified according to the macrophytes as free-floating, emergent and submerged macrophytes.…”

Section: Introductionmentioning

confidence: 99%

Municipal wastewater management using Vetiveria zizanioides planted in vertical flow constructed wetland

2018

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This study investigated wastewater management using Vetiveria zizanioides planted in vertical flow constructed wetland (VFCW). Wastewater from the grit removal chamber and the primary sedimentation tank of Daspoort Wastewater Treatment Works was fed into six-pilot VFCW consisting of 1000-L plastic tanks having 500-mm-deep, 10-15-mm-diameter granite substrate planted with V. zizanioides. Irrigation of macrophytes using effluent from the grit removal chamber and primary sedimentation tanks was done after 3 months of planting and the VFCW monitored. Wastewater samples were collected and analysed using standard procedures. The pollution parameters of the initial sample were total alkalinity 297 ± 27.3 mg/L; COD 627 ± 149.0 mg/L; EC 82.53 ± 5.4 ms/m; free and saline ammonia 36.02 ± 4.1 mg/L, nitrate/nitrite 0.09 ± 0.1 mg/L; pH 7.66 ± 0.4; phosphate 3.07 ± 0.3 mg/L, sulphate 44.57 ± 3.1 mg/L; TDS 551 ± 37.8; TSS 319 ± 34.2 mg/L; and TKN 41 ± 6 mg/L. Percentage removal of 89.57, 98.34% TSS; 98.95, 98.62 free and saline ammonia; 89.87, 91.44% TKN; and 80.65, 58.02% COD for screen and settled wastewater, respectively, was obtained from the VFCW. VFCW using locally available V. zizanioides is a viable alternative for municipal wastewater treatment.

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Effect of intermittent drainage on swine wastewater treatment by marsh–pond–marsh constructed wetlands

Cited by 39 publications

References 12 publications

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Comparison of constructed wetland and stabilization pond for the treatment of digested effluent of swine wastewater

Municipal wastewater management using Vetiveria zizanioides planted in vertical flow constructed wetland

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