Review of Ecological Floating Bed Restoration in Polluted Water

Deng, Yu; Ni, Fuquan

doi:10.4236/jwarp.2013.512128

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…Similarly, previous research found that H. vulgaris showed the best performance for nitrogen treatment among four plants, and the average removal rates of TN were 70.7% and 87.7% under high and low influent concentration [28]. These indicated that the purification efficiency of plant floating bed system would depend on the plant species and wastewater concentration [23].…”

Section: The Pollutants Removal By Plant Floatingsupporting

confidence: 59%

“…The plant-floating system could form a biofilm with a large surface area for the purification of water by both epiphyte and microbes [19]. The epiphyte could contact wastewater to absorb, transform and degrade the pollutants, and secrete large amount of enzyme and organic acid to accelerate the decomposition of the macromolecular pollutants and improve the bioavailability of nitrogen and phosphorus in wastewater [23]. Meanwhile, plant-floating system will bring various bacteria involved in pollutants degradation and removal into wastewater [24].…”

Section: The Pollutants Removal By Plant Floatingmentioning

confidence: 99%

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Purifying Eutrophic Wastewater from Geese Farm with Plant Floating Bed in Winter

Huang¹,

Liu²,

Xue³

et al. 2021

Pol. J. Environ. Stud.

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The goal of this study was to compare the effects of three plants (ryegrass, chicory and cress) in floating bed systems on purification of sedimentation pond wastewater (low-concentration) and biogas slurry (high-concentration) from geese farm in winter. The results showed that the floating bed with ryegrass had better removal rates on chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) of low-concentration wastewater than other groups at 60 days (P<0.05), and the removal rates were 53.0%, 83.3% and 61.1% respectively. At 90 days, cress has the best performance on removing 5-day biochemical oxygen demand (BOD 5) and turbidity (P<0.05), with a removal rate of 82.9% and 80.8%. The removal rates of BOD 5 , COD, TN and turbidity by ryegrass in highconcentration wastewater were significantly higher than other treatments (P<0.05), which were 84.0%, 70.2%, 56.2% and 82.1% respectively. However, ryegrass had better stem height, root length and plant biomass production compared with cress and chicory. In conclusion, ryegrass was an optimal floating plant for purification of geese wastewater in winter and the optimal treatment time was 60 days. The regress has strong adaption for fluctuate concentrations of pollutants and is suitable for treatment of livestock and poultry wastewater in practice.

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Section: The Pollutants Removal By Plant Floatingsupporting

confidence: 59%

Section: The Pollutants Removal By Plant Floatingmentioning

confidence: 99%

Purifying Eutrophic Wastewater from Geese Farm with Plant Floating Bed in Winter

Huang¹,

Liu²,

Xue³

et al. 2021

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

show abstract

“…These methods have some advantages over other traditional water treatment processes, which include low running cost, easy maintenance, no secondary pollution, economic and environmental benefits and high efficiency in the restoration of river ecosystems and river water quality [67]. However, they require a large area, have low hydraulic load and exhibit intolerance to heavy pollutant loading rate [9], including the observation of seasonal death and plant diseases [68]. Therefore, living plants are recommended to be replaced by aqua mats and artificial seaweed, which can enhance the growth of microorganisms and overcome the above drawbacks [69].…”

Section: Constructed Wetlandsmentioning

confidence: 99%

“…Nutrient removal efficiency of floating beds is primarily governed by the selection of plant species and their microbial community structure (β-Proteobacteria, α-Proteobacteria and Nitrosomonadaceae) grown in the bed [60]. Other factors that affect their performance include temperature, seasonal variation, reaction contact time and concentration of contaminants [68]. The addition of adsorbent materials (e.g., zeolites, phyllosilicate minerals, red mud adsorbent, activated carbon and bio-sorbents, etc.)…”

Section: Factors Affecting Performance Of Floating Bedmentioning

confidence: 99%

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar

Chowdhury

2020

Sustainability

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Selection of appropriate river water treatment methods is important for the restoration of river ecosystems. An in-depth review of different river water treatment technologies has been carried out in this study. Among the physical-engineering processes, aeration is an effective, sustainable and popular technique which increases microbial activity and degrades organic pollutants. Other engineering techniques (water diversion, mechanical algae removal, hydraulic structures and dredging) are effective as well, but they are cost intensive and detrimental to river ecosystems. Riverbank filtration is a natural, slow and self-sustainable process which does not pose any adverse effects. Chemical treatments are criticised for their short-term solution, high cost and potential for secondary pollution. Ecological engineering-based techniques are preferable due to their high economic, environmental and ecological benefits, their ease of maintenance and the fact that they are free from secondary pollution. Constructed wetlands, microbial dosing, ecological floating beds and biofilms technologies are the most widely applicable ecological techniques, although some variabilities are observed in their performances. Constructed wetlands perform well under low hydraulic and pollutant loads. Sequential constructed wetland floating bed systems can overcome this limitation. Ecological floating beds are highly recommended for their low cost, high effectiveness and optimum plant growth facilities.

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“…The water hyacinth is extremely efficient in adsorbing ammonia in water because ammonia is very much needed for its nutrition. Deng and Ni [49] and Wu et al [50] reported that the adsorption process of ammonia occurs specifically at the roots, as illustrated in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Phytoremediation and Filtration for Diamond-mine-tailings Water Treatment

Noor

Rahman

Gazali

et al. 2020

MST

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The water pollution caused by diamond mine activities can kill aquatic life. In this work, we used phytoremediation and filtration to treat pond water polluted by the tailings of a diamond mine located in South Kalimantan, Indonesia. Einchhornia crassipes (water hyacinth) was utilized as the biomass for the phytoremediation process. Gravel (10-15 mm) and sand (0.1-1 mm) were used as filter media in the simple filtration setup, using an up-flow system (bottom to top). In the experiment, 16 L of diamond tailing water was poured into five phytoremediation reactors (each 60 L in volume), which were then tested over seven days. A pretreatment analysis of the tailings water showed that its biochemical oxygen demand (BOD) of 8.9 mg L −1 and chemical oxygen demand (COD) of 22 mg L −1 exceeded the national maximum standards of 2 mg L −1 and 10 mg L −1 , respectively. The experimental results demonstrate that both phytoremediation and filtration could increase the dissolved oxygen concentration (4.7 mg.L −1 ) and reduce the BOD (3.2 mg.L −1 ), COD (6.5 mg.L −1 ), Fe (0.6 mg.L −1 ), Mn (0.16 mg.L −1 ), and ammonia (0.63 mg.L −1 ) concentrations from those measured in the raw diamond-mine-tailings water. The phytoremediation performance was better than that of filtration. The COD values were successfully reduced to the permissible limit, although the other parameters still failed to meet the government water quality regulation requirements. Abstrak Metode Perbandingan antara Proses Fitoremediasi dan Proses Filtrasi Sederhana untuk Mengolah Air BekasGalian Tambang Intan. Polusi air yang disebabkan aktivitas pertambangan dapat membunuh kehidupan akuatik. Penelitian ini bertujuan untuk mengolah air tercemar bekas galian tambang intan di Kalimantan Selatan, Indonesia menggunakan proses fitoremediasi dan filtrasi sederhana. Eichornia Crassipes (eceng gondok) digunakan sebagai biomassa selama proses fitoremediasi. Media penyaring seperti kerikil (10-15 mm) dan pasir (0,1-1 mm) ditambahkan ke dalam reaktor filtrasi sederhana yang memiliki aliran atas (dari bawah ke atas). 16 L air bekas galian tambang intan dituangkan ke dalam 5 reaktor (volume 60 L) dan di uji selama 7 hari pada proses fitoremediasi menggunakan metode batch. Analisis pra-perlakuan air tercemar bekas galian tambang menunjukkan BOD sebesar 8,9 mg.L -1 dan COD sebesar 22 mg.L -1 melebihi maksimum nasional yaitu 2 dan 10 mg.L -1 , berturut-turut. Berdasarkan eksperimen, fitoremediasi dan filtrasi memiliki kemampuan untuk meningkatkan DO (4.7 mg.L -1 ) dan mengurangi BOD (3.2 mg.L -1 ), COD (6.5 mg.L -1 ), Fe (0.6 mg.L -1 ), Mn (0.16 mg.L -1 ) serta ammonia (0.63 mg.L -1 ) dari nilai awal air bekas galian tambang. Fitoremediasi menghasilkan performa lebih baik dalam penyisihan dibandingkan filtrasi. Nilai akhir COD memenuhi baku mutu, sedangkan parameter lain tidak memenuhi peraturan pemerintah mengenai kualitas air.

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Review of Ecological Floating Bed Restoration in Polluted Water

Cited by 11 publications

References 12 publications

Purifying Eutrophic Wastewater from Geese Farm with Plant Floating Bed in Winter

Purifying Eutrophic Wastewater from Geese Farm with Plant Floating Bed in Winter

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Comparison of Phytoremediation and Filtration for Diamond-mine-tailings Water Treatment

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