Treating eutrophic water for nutrient reduction using an aquatic macrophyte (Ipomoea aquatica Forsskal) in a deep flow technique system

2008 ◽  
Vol 95 (5) ◽  
pp. 607-615 ◽  
Author(s):  
M.H. Hu ◽  
Y.S. Ao ◽  
X.E. Yang ◽  
T.Q. Li
Keyword(s):  
Aquatic Macrophyte ◽  
Nutrient Reduction ◽  
Ipomoea Aquatica ◽  
Eutrophic Water ◽  
Deep Flow Technique ◽  
Technique System

Nitrogen removal from eutrophic water by floating-bed-grown water spinach (Ipomoea aquatica Forsk.) with ion implantation

2007 ◽  
Vol 41 (14) ◽  
pp. 3152-3158 ◽  
Author(s):  
Miao Li ◽  
Yue-Jin Wu ◽  
Zeng-Liang Yu ◽  
Guo-Ping Sheng ◽  
Han-Qing Yu
Keyword(s):  
Ion Implantation ◽  
Nitrogen Removal ◽  
Water Spinach ◽  
Ipomoea Aquatica ◽  
Eutrophic Water

scholarly journals Azolla (Caroliniana): An Aquatic Energy Crop for Remediation of Eutrophic Ecosystems with Prospect of Biofuel Production in Bangladesh

2020 ◽  
Vol 7 (2) ◽  
pp. 79-XX
Author(s):  
Kamrun Nahar
Keyword(s):  
Water Quality ◽  
Aquatic Macrophyte ◽  
High Growth ◽  
Green Energy ◽  
Growth Potential ◽  
Biofuel Production ◽  
Energy Crop ◽  
Eutrophic Lakes ◽  
Eutrophic Water ◽  
Nacl Concentration

The Phytoremediation ability of aquatic macrophyte, Azolla as potential biomass, to improve the quality of eutrophic lakes and river water of Bangladesh at lab scale were studied to remove organics, solutes and improving the physicochemical properties of water including pH, DO, EC, TDS, Turbidity and NaCl concentration. In the different eutrophic water, a 100% survival rate of the species was observed. The extensive root system of the phytoremediator improves water quality after one week as determined by a marked decrease in Turbidity, TDS,  EC & Nacl and increased in DO and pH. DO content served as a useful indicator of water quality and increased manifolds over 7 days (one week) of treatment. The capability of the plant in removing pollutants and improving water quality was established from the study. After phytoremediation activities, the discarded energy crop biomass could be used to produce green energy because of its high growth potential.  

scholarly journals Toxicity of Zinc on Growth of an Aquatic Macrophyte, Ipomoea Aquatica Forsk

2016 ◽  
Vol 11 (1) ◽  
pp. 218-227 ◽  
Author(s):  
Laitonjam Chanu ◽  
Abhik Gupta
Keyword(s):  
Aquatic Ecosystems ◽  
Shoot Growth ◽  
Aquatic Macrophyte ◽  
Growth Parameters ◽  
Dry Weight ◽  
Fresh Weight ◽  
High Concentration ◽  
Carotene Content ◽  
Ipomoea Aquatica ◽  
Root And Shoot Growth

The effects of different concentrations of Zn on growth of an aquatic macrophyte, Ipomoea aquatica Forsk. were studied. Fresh weight, dry weight, shoot length, root length, number of nodes, development of leaves, and chlorophyll and carotene contents were the different growth parameters considered. Toxicity symptoms like browning and decaying of roots could be observed in plants treated at 22.7 mg L-1 Zn as early as 3rd day of experiment while yellowing of older leaves appeared during the later period of exposure. High concentration of Zn (12.71 – 22.7 mg L-1) significantly inhibited the growth of plant while lower Zn concentrations up to 4.09 mg L-1 enhanced its growth. However, at 7.26 mg L-1 Zn the chlorophyll as well as total carotene content in leaf of I. aquatica were significantly reduced from that in control on 5th day of exposure and subsequently the reduction was observed in lower concentrations. Thus, I. aquatica can be employed in biomonitoring of Zn polluted aquatic ecosystems using root browning, root and shoot growth inhibition, and chlorophyll and total carotene contents as sensitive biomarkers.

Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae.

2020 ◽  
Author(s):  
Gonzalo Flores-Morales ◽  
Mónica Díaz ◽  
Patricia Arancibia-Avila ◽  
Michelle Muñoz-Carrasco ◽  
Pamela Jara-Zapata ◽  
...  
Keyword(s):  
Organic Waste ◽  
Low Cost ◽  
Organic Liquid ◽  
Agricultural Waste ◽  
Filamentous Algae ◽  
Tertiary Treatment ◽  
Nutrient Reduction ◽  
Algae Removal ◽  
Algae Growth ◽  
Waste Effluents

Abstract A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

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