Finding the harvesting frequency to maximize nutrient removal in a constructed wetland dominated by submerged aquatic plants

Verhofstad, M.J.J.M.; Poelen, M.D.M.; Kempen, Monique M. L. van; Bakker, Elisabeth S.; Smolders, Alfons J. P.

doi:10.1016/j.ecoleng.2017.06.012

Cited by 40 publications

(18 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Information relating to the influence of harvesting biomass on the growth performance and nutrient removal efficiency of plants in aquaponic systems is very limited; however, a very recent study found harvesting can cause damage to the plant tissues and that the plants after harvesting would not have the ability to transport nutrients and nonstructural carbohydrates from the stems and leaves to the storage organs, which could support the growth of new buds [16]. Several studies with different plant species also found that repeated aboveground harvesting can slow down plant biomass development because harvesting does not allow sufficient opportunity for plants to absorb more nutrients for growth, consequently leading to very low biomass production compared to that in those not harvested [10,11,20,21]. In the present study, the amount of harvested plants in the 50% harvested system decreased at the third and fourth harvestings (Figure 5a), suggesting that harvesting can affect nutrient storage in plant tissues.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, several studies have suggested that overall nutrient removal could be improved if a harvesting regime is applied [8][9][10], but others reveal that harvesting can negatively affect nutrient removal [11][12][13]. The importance of harvest management for the nutrient removal, as well as the growth and development of plants, has always been highly controversial [8,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L.)

Irhayyim

Fehér

Lelesz

et al. 2020

Water

View full text Add to dashboard Cite

The harvesting of plant biomass is usually implemented as an effective tool for plant management and removing the nutrients absorbed in plant tissues. Here, the influence of harvesting different biomasses (50%, 33%, 25%, and 0% (no harvest)) of watercress (Nasturtium officinale) was investigated in integrated recirculating aquaponic systems (IRASs) for rearing common carp (Cyprinus carpio). Twelve independent IRASs were designed (4 × 3); each system consisted of a fish rearing tank, a waste collection tank, and a hydroponic bed. Water quality parameters and the growth of both fish and plants were measured in all the systems, and then the nutrient removal capacities of the hydroponic beds were calculated. The results revealed that increasing the biweekly harvested biomass of the plants decreased the growth of the watercress, while it did not affect the growth of the common carp. Increasing the harvested biomass of the plants also decreased the nitrate nitrogen and orthophosphate removal efficiencies of the aquaponic systems, while it did not affect the ammonia and nitrite nitrogen removal efficiencies. Therefore, a biweekly harvesting of less than 25% of the biomass of the growing watercress is recommended for efficient nutrient removal and the sustainable growth of both watercress and the common carp in aquaponic systems.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L.)

Irhayyim

Fehér

Lelesz

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…Moreover, aquatic plants are more likely to release allelochemicals in their vigorous growth period [18]. At present, it is considered that a harvesting frequency of 2-3 times is the most appropriate frequency during a plant's growth cycle [49]. Therefore, in practical applications, appropriate harvesting should be conducted to ensure the suitable planting density.…”

Section: Optimization Of Plant Combination In Practical Applicationmentioning

confidence: 99%

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

Wang

Guo

et al. 2020

Water

View full text Add to dashboard Cite

Combined planting of submerged macrophytes could be an effective way of controlling algal blooms in landscape waters. In this study, the algal inhibition of single and combined planting of Hydrilla verticillata (A) and Myriophyllum spicatum (B) were explored. The optimized combined planting conditions were investigated using the central composite design. The results showed that the combined planting had a synergistic algal-inhibiting effect. Its inhibition (I (K)) is about 10.8% higher than that of single planting with the same density. The synergism of the combined planting may be due to the different ways in which the two plants inhibit the algal growth. H. verticillata inhibited the algal biomass and M. spicatum inhibited the algal specific growth rate. When the density of H. verticillata and M. spicatum were 7.2 g/L and 6.7 g/L, the value of I (K) reached a maximum 92.2%. Although increasing planting density would improve the algal inhibition, high planting density was not beneficial for the growth of plants. Moreover, no further significant improvement was shown with the increasing planting density when the value of I(K) was higher than 90%. Therefore, the cost-effective combined macrophyte density was 11.6 g/L and the value of A/B ranged from 1.05 to 1.07, where the value of I (K) could achieve 90%. This study can provide a practical basis for using macrophytes to control algal blooms.

show abstract

“…The idea behind nutrient removal is that plants absorb these elements and incorporate them into their tissues during the growth period [3,8]. However, this mechanism is only one very small part of nutrient removal in these systems.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

Finding the harvesting frequency to maximize nutrient removal in a constructed wetland dominated by submerged aquatic plants

Cited by 40 publications

References 60 publications

Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L.)

Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L.)

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

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

Contact Info

Product

Resources

About