Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Sharma, Pradeep Kumar; Inoue, Takashi; Kato, Kunihiko; Ietsugu, H.; Tomita, Kunihiko; Nagasawa, Tooru

doi:10.1016/j.ecoleng.2012.12.054

Cited by 32 publications

(16 citation statements)

References 29 publications

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“…Similar results are also reported by other authors [45,[50][51][52]. On the other hand, higher evapotranspiration rates in spring-summer period which will result in a lengthening of the retention times (on average 3.2 days), which ensures more time for phosphorus removal by both physical and chemical processes as biological processes [39,42].…”

Section: Phosphorous Removalsupporting

confidence: 79%

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Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

et al. 2018

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Abstract:Cultural eutrophication stimulated by anthropogenic-derived nutrients represents one of most widespread water quality problems worldwide. Constructed wetlands (CWs) have emerged as an aesthetic, sustainable form of wastewater treatment, but, although they have shown adequate levels of organic matter removal in wastewaters, the effectiveness of nutrient removal has been less successful. An eleven-month monitoring program was undertaken in a horizontal subsurface flow CW (HSSF-CW) treating domestic wastewater from a village in Centre Region of Portugal, to evaluate the influence of climatic conditions (Continental-Mediterranean Climate region) and seasonal variations on removal. This CW uses gravel and sand as substrate and Phragmites australis as wetland plants. Samples were collected at the inlet and outlet from wetland bed and analyzed for pH, TN, Org-N, NH 4 + -N, NO x -N, TP and DP. The removal efficiencies (RE) of nitrogen and phosphorus compounds were relatively poor, but the results allow us to conclude that season had a significant (p < 0.05) effect on the RE of TN, NH 4 + -N, NO x -N, TP and DP, with higher values in warmest period (10.4%, 10.4%, 3.4%, 27.5% and 26.1%, respectively) than in coldest period (0%, −7.7%, −9.8%, 12.9% and 0%, respectively). Although lower hydraulic loading rate (HLR) generally resulted in better RE of all N and P compounds analyzed, no significant linear relationship was observed between these two variables. TN and NH 4 + -N concentrations in the effluent tend to significantly (p < 0.05) decrease with increasing respective incoming mass load rates for whole monitoring period and during spring-summer period, while the correlation between outlet TP concentrations and the inlet loading rate are not significant. The results indicate that the system is not effective for removal of nutrients, probably because it operated on overload and with a low hydraulic retention time (HRT) (average = 2.4 days). The results also showed that the RE of N and P followed seasonal trends, with higher values during spring-summer period.

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Section: Phosphorous Removalsupporting

confidence: 79%

“…In addition, Gagnon [49] reported a poor P removal in three wetlands where DP was the dominant P form in the inflow and found in fact the wetlands acted as net sources of P on an annual basis during establishment. Generally, phosphorous RE reported in the literature is variable and usually range from 26% to 70% [12,23,45,50].…”

Section: Phosphorous Removalmentioning

confidence: 99%

Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

et al. 2018

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“…Dairy and CWH wastewater composition are quite similar as they contain mainly organic substances (lactose, lipids, fats, etc.). A significant number of studies have used CWs to treat dairy farm wastewaters . Some of these studies mixed dairy wastewater with other types of wastewater such as dirty farmyard waters and municipal wastewaters .…”

Section: Introductionmentioning

confidence: 99%

Effect of hydraulic retention time, temperature, and organic load on a horizontal subsurface flow constructed wetland treating cheese whey wastewater

Sultana

Mourti

Tatoulis

et al. 2015

J of Chemical Tech & Biotech

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BACKGROUND One of the main components of dairy wastewaters is cheese whey. Although different technologies have been used extensively in the past for cheese‐whey treatment, constructed wetlands (CWs) applications are limited. Furthermore, the effect of crucial operational parameters (e.g. temperature, pollutant loading rate) have not been thoroughly studied. Having this in mind, two horizontal subsurface flow pilot‐scale CW units (one planted and one unplanted) were used to treat secondary cheese whey, in order to examine the effect of different chemical oxygen demand (COD) influent concentrations (1200 to 7200 mg L−1), hydraulic residence times (8, 4, 2 and 1 day) and temperature (2.4 to 32.9 °C). RESULTS During a 2‐year operating period both pilot‐scale units successfully removed organic matter, with COD removal efficiencies recorded at 91% and 77.2% for the planted and the unplanted unit, respectively. Hydraulic residence time affected COD removal efficiency only when limited to 1 day. Temperature significantly affected COD removal only in the unplanted unit. CONCLUSIONS Constructed wetlands could successfully treat secondary cheese whey and provide COD effluent concentrations below EU legislation, when hydraulic residence time is above 2 days and COD influent concentration ranges from 1200 to 3500 mg L−1. © 2015 Society of Chemical Industry

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“…Among the recent developments, hybrid sub-surface CWs are becoming more popular because of their higher treatment potential (Noorvee et al, 2005;Öövel, 2007;Tuszyñska and Obarska-Pempkowiak, 2008;Justin, 2009;Singh et al, 2009;Kato et al, 2010Kato et al, , 2013Sharma et al, 2012;Serrano et al, 2011;Vymazal and Kröpfelova, 2011). The Performance of a CW is affected by a range of factors such as operational mode (loading rate, continuous or batchload) and environmental conditions (climate, season, temperature etc.)…”

Section: Introductionmentioning

confidence: 99%

Effects of load fluctuations on treatment potential of a hybrid sub-surface flow constructed wetland treating milking parlor waste water

Sharma

Inoue

Kato

et al. 2013

Ecological Engineering

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A hybrid sub-surface constructed wetland (CW) system consisting of 2 gravel filled vertical sub-surface (VFa & VFb) beds, each 160 m(2) in size planted with Phragmites australis and a sand filled horizontal sub-surface (HF) bed, 336 m(2) in size, planted with rice was operated from 2007 to 2010 for treating milking parlor waste water in Hokkaido, Japan. Hybrid CW system received huge fluctuations in average yearly inlet loads for TSS (526.0-1259 mg L-1 & 2.7-9.0 g m(-2) d(-1)), BOD5 (1,080-2,114 mg L-1 & 8.4-14.4 g m(-2) d(-1)), COD(1,962-7,085 mg L-1 & 14.5-50.0 g m(-2) d(-1)), TN (116.0-243.0 mg L-1 & 0.8-1.6 g m(-2) d(-1)), NH4-N (54.0-90.0 mg L-1 & 0.40-0.64 g m(-2) d(-1)), TC (1,022-2,215 mg L-1 & 6.0-15.1 g m(-2) d(-1)), TP (15.3-41.7 mg L-1 & 0.11-0.28 g m(-2) d(-1)) during study period. Average yearly purification and removal rates were least fluctuated for TSS (95.7-99.4%); moderately for BOD5 (86.1-95.7%), COD(87.5-96.1%) and TC (79.5-91.3%); highly for TN (72.6-90.6%), NH4-N (62.9-85.3%) and TP (64.8-87.2%). A sharp decrease in TP purification and removal rates were observed in 2008 due to sharp decrease in influent TP concentration in 2008 compared to 2007. OTR values for VF(a), VF(b), HF bed and total system were observed as 21.7, 19.3, 4.8 and 12.3 g O-2 m(-2) d(-1) respectively. Average k value of hybrid CW system for BOD5, TN, NH4-N and TP during study period were 7.0 +/- 1.8, 7.4 +/- 3.3, 5.6 +/- 4.1 and 4.9 +/- 2.0 m yr(-1) respectively. Average concentration of TSS, TP, TN and NH4-N in the final effluent for all years were below the discharge limit value of: 150 mg L-1 for TSS; 8 mg L-1 for TP, 60 mg L-1 for TN and NH4-N. However, average BOD5 and COD concentrations could not meet the discharge limit value of 120 mg L-1 during 2007 and 2008. (C) 2013 Elsevier B. V. All rights reserved

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Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Cited by 32 publications

References 29 publications

Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

Effect of hydraulic retention time, temperature, and organic load on a horizontal subsurface flow constructed wetland treating cheese whey wastewater

Effects of load fluctuations on treatment potential of a hybrid sub-surface flow constructed wetland treating milking parlor waste water

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