Growth characteristics of aquatic macrophytes cultured in nutrient-enriched water: I. Water hyacinth, water lettuce, and pennywort

1984 ◽  
Vol 38 (2) ◽  
pp. 229-239 ◽  
Author(s):  
K. R. Reddy ◽  
W. F. Debusk
Keyword(s):  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Growth Characteristics ◽  
Water Lettuce

scholarly journals Suitability of Macrophytes for Wastewater Treatment and Biogas Generation

2019 ◽  
Vol 9 (2S2) ◽  
pp. 16-18
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Cow Dung ◽  
Water Lettuce ◽  
Before And After ◽  
Almost All

In this paper three sustainable approaches are made in waste management option. Firstly primary treated domestic sewage is treated by aquatic macrophytes using duckweed, water hyacinth and water lettuce. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Nitrates are tested before and after. Result indicates in terms of water quality, almost all three plants shows same removal efficiencies. BOD and TSS removal efficiency is attained more than 95%. COD and TDS removal is reached upto 50% for almost all plants. Secondly the used aquatic macrophytes for wastewater treatment is again used for generation of biogas (water lettuce unit, duckweed unit, water lettuce unit). In addition to three aquatic macrophytes, sludge is collected from aquatic macrophyte unit for generation of biogas. Comparison is made with conventional cow dung biogas unit. Result indicates water lettuce and duckweed produce biogas at earlier stage itself and water hyacinth takes some time for starting of biogas production. This may be due to the structure and texture causes some time for decomposition. Sludge gives maximum biogas generation among all experimental setup. Also in this study cow dung did not give biogas more may be due to poor blend ratio of cow dung with water is one of the reason.

scholarly journals Utilização de macrófitas aquáticas em substrato para a produção de mudas de moringa

2016 ◽  
Vol 36 (85) ◽  
pp. 25 ◽  
Author(s):  
Walda Monteiro Farias ◽  
Leonaldo Alves de Andrade ◽  
Manoel Bandeira de Albuquerque ◽  
João Rodrigues da Cunha
Keyword(s):  
Water Hyacinth ◽  
Dry Matter ◽  
Aquatic Macrophytes ◽  
Moringa Oleifera ◽  
Water Lettuce ◽  
Relative Growth ◽  
Substrate Composition ◽  
Crown Diameter ◽  
Shoot Ratio ◽  
Root Shoot Ratio

A utilização de macrófitas aquáticas na composição de substratos para produção de mudas de moringa constitui uma alternativa sustentável. Portanto, objetivou-se com esta pesquisa avaliar o desenvolvimento de mudas de moringa, utilizando subtratos com macrófitas aquáticas, e determinar os teores de N, P e K nas mudas. Utilizaram-se diferentes combinações de macrófitas (M), esterco bovino (E) e terra vegetal (TV) para compor os subtratos. O experimento foi conduzido em esquema fatorial 3 × 4, em delineamento em blocos casualizados com quatro repetições. Foram avaliados: alturas das plantas, diâmetro da copa e caule, taxa relativa de crescimento em altura, em diâmetro da copa e do caule, matéria seca da parte aérea e raízes, comprimento de raízes e razão raízes/parte aérea, além dos teores de N, P e K das mudas. As mudas de moringa apresentam crescimento reduzido quando produzidas em substratos constituídos unicamente com taboa. Alface d’água e os substratos compostos por 60% M + 30% E + 10% TV e 70% M + 30% E, proporcionaram melhor nutrição e crescimento das mudas de moringa. O substrato 60M+30E+10TV composto pelo aguapé e taboa promoveram maior aporte de P para as mudas de moringa.Use of aquatic macrophytes in substrate composition to produce moringa The use of aquatic macrophytes in substrate composition to produce seedlings of moringa is a sustainable alternative. Therefore, the objective of this research was to evaluate the development of moringa seedlings using substrates composed with aquatic macrophytes, and to determine concentrations of N, P and K in the seedlings. We used different combinations of weeds (M), manure (E) and topsoil (TV) to compose the substrates. The experiment was conducted in a 3 × 4 factorial in randomized arrangement with four replications. We evaluated plant height, crown diameter and stem, relative growth rate in height, canopy diameter and in stem, dry matter of aerial part and of roots, root length and root/shoot ratio, besides the content of N, P and K in seedlings. Moringa seedlings showed reduced growth when produced in substrates composed only with cattail. Water lettuce and substrates composed of 60% M + 30%E + 10 % TV and 70% M + 30% E, promoted greater nutrition and growth of moringa seedlings. The substrate 60M +30E +10TV composed by water hyacinth and cattail resulted in greater amount of P in moringa seedlings.Index terms: Organic compound;Typha domingensis;Moringa oleifera

scholarly journals Kandungan Unsur Hara Pada Pupuk Organik Tumbuhan Air Lokal

2020 ◽  
Vol 6 (2) ◽  
pp. 140-148
Author(s):  
Pienyani Rosawanti
Keyword(s):  
Water Hyacinth ◽  
Organic Fertilizer ◽  
Nutrient Content ◽  
Potassium Content ◽  
Organic Fertilizers ◽  
Water Lettuce ◽  
Minimum Standard ◽  
Central Kalimantan ◽  
Fertilizer Nitrogen ◽  
Giant Salvinia

Water hyacinth, giant salvinia and water lettuce are widely available in Central Kalimantan that can be used as organic fertilizer. This study aims to determine the nutrient content of solid and liquid organic fertilizers in water hyacinth, giant salvinia and water lettuce fertilizers. The results showed that solid organic fertilizer/compost and water hyacinth, water lettuce and giant salvinia liquid fertilizer have nutrient content needed by plants. In solid fertilizers, the Nitrogen of giant salviniacontent was 2.43% and lack of the minimum standard of solid organic fertilizer, while Phospor and Potassium content were not included in the standard. In liquid organic fertilizer, Nitrogen, Phospor and Potassium content were not included in the minimum standard organic fertilizer requirements

Alien Invasive Aquatic Plant Species in Botswana: Historical Perspective and Management

2016 ◽  
Vol 9 (1) ◽  
pp. 1-40 ◽  
Author(s):  
C. N. Kurugundla ◽  
B. Mathangwane ◽  
S. Sakuringwa ◽  
G. Katorah
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Plant Species ◽  
Water Hyacinth ◽  
Water Bodies ◽  
Pistia Stratiotes ◽  
Okavango Delta ◽  
Aquatic Weeds ◽  
Water Lettuce ◽  
The Government

Aquatic ecosystems in Botswana have been under threat by the aquatic alien invasive plant species viz., salvinia Salvinia molesta Mitchell, water lettuce Pistia stratiotes L., and water hyacinth Eichhornia crassipes (Mart.) Solms-Laub. While salvinia has been termed the major threat to the Botswana wetlands, water lettuce and water hyacinth are considered to be of minor importance. This review presents the species biology, distribution, historical spread, negative impacts, control achieved right from their discovery in the country by referring to their control and management in the world. Having infested the Kwando-Linyanti-Chobe Rivers in the 1970s, salvinia was initially tried by the use of herbicides, paraquat and glyphosate, between 1972 and 1976. With the discovery of the host specific biological control weevil Cyrtobagous salviniae Calder and Sands in 1981, the weevil was introduced by Namibians on Kwando and Chobe Rivers in 1983 and by Botswana in 1986 in the Okavango Delta. While the control was slowly establishing in Kwando-Linyanti-Chobe Rivers, it became apparent that lakes and perennial swamps within and outside Moremi Game Reserve of the Okavango Delta were infested with salvinia from 1992 onwards. With continuous and sustained liberation of the weevil in the Kwando-Linyanti-Chobe Rivers and in the Okavango Delta between 1999 and 2000, salvinia control was achieved by 2003, and since then the weevil constantly keeps the weed at low levels. The success is mainly due to sustainable monitoring through the application of physical and biological control methods. However, salvinia is still threatening the Okavango Delta due to factors such as tourism activities, boat navigation fishing and transporttion by wild animals. The first occurrence of water lettuce was recorded on Kwando and Chobe Rivers in 1986. Its biocontrol weevil Neohydronomous affinis Hustache was released in the year 1987. The weevil became extinct in Selinda Canal and Zibadianja Lake on Kwando River due to dry and wet events for over 10 years and the weed had been under control biologically on Chobe River. Having surface covered the Selinda and a part of the Zibadianja in high flood and rainfall in 1999/2000 season, research was undertaken to contain water lettuce, which led to its eradication by 2005. Regular physical removal of the water lettuce prior to fruit maturity is an effective method of control or eradicating the weed in seasonal water bodies. The Limpopo Basin (shared by Botswana, South Africa, Zimbabwe and Mozambique) has become vulnerable to water hyacinth infestation. Water hyacinth infested the trans-boundary Limpopo River in 2010 sourced from Hartbeesport Dam on Crocodile River in South Africa. Botswana and South Africa have been consulting each other to implement integrated control of the weed jointly in the Limpopo River. Water hyacinth could be a continuous threat to the dams and the rivers in the Limpopo basin if its control is not taken seriously. These three species are found growing in Botswana in a range of pH between 4.5 and 10.3 and in the range of conductivities between 20 and 580 µS cm-1. Range of soluble nitrates, phosphates and potassium in the habitats of salvinia infestations were 0.02 to 1.5, 0.01 to 1.78 and 0.3 to 6.92 mg L-1 respectively. Water lettuce infestation in the seasonal Selinda Canal had a maximum of 4.7 mg L-1 nitrates, 2.8 mg L-1 phosphates and 7.9 mg L-1 potassium. Nevertheless, these three nutrients were in the range of 0.41 to 9.56 mg L-1, 0.2 to 2.9 mg L-1, and 7.7 to 11.53 mg L-1 respectively in the Limpopo River where water hyacinth infestations were observed. These nutrients were considerably high during decomposition phase of biological control of weeds. The Government of Botswana “regulates the movement and importation of boats and aquatic apparatus, to prevent the importation and spread of aquatic weeds both within and from the neighboring countries” by “Aquatic Weed (Control) Act” implemented in 1986. These measures, combined with communities, conservation groups, NGOs and public awareness campaigns, have highlighted the gravity of aquatic weeds spreading into wetlands, dams and other water bodies. In conclusion, the Government of Botswana is committed and supportive through the Department of Water Affairs in protecting the wetlands of the country efficiently and prudently.

Removal of Heavy Metals from Aquatic Environments Using Water Hyacinth and Water Lettuce

2018 ◽  
Vol 68 (12) ◽  
pp. 2765-2767 ◽  
Author(s):  
Violeta Monica Radu ◽  
Petra Ionescu ◽  
Elena Diacu ◽  
Alexandru Anton Ivanov
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aquatic Plants ◽  
Water Hyacinth ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Aquatic Environments ◽  
Water Lettuce ◽  
Removal Of Heavy Metals ◽  
Eichornia Crassipes

The quality of the aquatic environment was strongly influenced by the development of urbanization, industrialization and population growth, and therefore water pollution, mainly due to the presence of heavy metal, becoming a widespread concern. The objective of this work was to evaluate the possibility to remove heavy metals Cd, Zn, Cr and Ni from wastewater using two aquatic plants, water hyacinth (Eichornia crassipes) and water lettuce (Pistia stratiottes). These plants possess excellent abilities to metabolize and bioaccumulate heavy metals from various polluted aquatic environments. For a period of 30 days, the content of heavy metals from wastewater and aquatic plants samples was monitored weakly and the efficacy of these plants to remove heavy metals was quantified. Heavy metals were determined by atomic absorption spectrophotometry with graphite furnace (GFAAS). The obtained results have shown the efficacy of Eichornia crassipes and Pistia stratiottes to remove metals from the studied wastewater. The bioaccumulation rate of heavy metals in plants was effective until day 24 of the period of 30 days of the experiment, as the plants become inefficient beyond this period. The uptake of heavy metals in the studied aquatic plants depends on the concentration of each heavy metal present in the used wastewater and the exposure time.

Potential of Biogas Production from Floating Aquatic Weeds

2013 ◽  
Vol 824 ◽  
pp. 467-472 ◽  
Author(s):  
M.A. Enaboifo ◽  
O.C. Izinyon
Keyword(s):  
Water Hyacinth ◽  
Laboratory Experiments ◽  
Biogas Production ◽  
Early Stage ◽  
Gas Production ◽  
Cow Dung ◽  
Aquatic Weed ◽  
Aquatic Weeds ◽  
Water Lettuce ◽  
Retention Period

This study investigates the potential of biogas production from water hyacinth, water lettuce and water fern. Laboratory experiments were carried out at the Faculty of Agriculture laboratory, University of Benin, Nigeria. The aquatic weeds which are major constituents of the substrate were contained in the conical flasks used as digester. The cow dung and aquatic weeds were mixed in the ratio of 1:1; 1:2; 1:3; 1:4; and 1:5 in the different samples used for each of the three aquatic weeds and gas produced measured.The results obtained showed that no gas was produced in any of the flasks containing the aquatic weed within 21days. Gas production was however recorded in those with cow dung alone which gave 302ml of biogas within the 21 days retention period with an average of 21ml of gas produced within the active 14 days of production. The results also showed variations in gas production between daytime and night hours with minimal gas production recorded at night hours and peak production during the daytime. It was concluded that cow dung requires shorter retention time to initiate production of biogas when compared with that of the aquatic weeds and therefore can be used to sustained biogas production in aquatic weed at the early stage.

Ethanol production from candidate energy crops: Water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes L.)

2008 ◽  
Vol 99 (7) ◽  
pp. 2495-2500 ◽  
Author(s):  
D. Mishima ◽  
M. Kuniki ◽  
K. Sei ◽  
S. Soda ◽  
M. Ike ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Energy Crops ◽  
Pistia Stratiotes ◽  
Water Lettuce

scholarly journals Treatment of Water Using Water Hyacinth, Water Lettuce and Vetiver Grass - A Review

2012 ◽  
Vol 2 (5) ◽  
pp. 202-215 ◽  
Author(s):  
Piyush Gupta ◽  
Surendra Roy ◽  
Amit B. Mahindrakar
Keyword(s):  
Water Hyacinth ◽  
Water Lettuce ◽  
Vetiver Grass
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