Anaerobic digestion of harvested aquatic weeds: water hyacinth (Eichhornia crassipes), cabomba (Cabomba Caroliniana) and salvinia (Salvinia molesta)

2010 ◽  
Vol 36 (10) ◽  
pp. 1459-1468 ◽  
Author(s):  
Cathryn O'Sullivan ◽  
Beth Rounsefell ◽  
Alistair Grinham ◽  
William Clarke ◽  
James Udy
Keyword(s):  
Anaerobic Digestion ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Aquatic Weeds ◽  
Salvinia Molesta ◽  
Cabomba Caroliniana

scholarly journals Inventarisasi Dan Identifikasi Tumbuhan Air di Danau Hanjalutung Kota Palangka Raya

2020 ◽  
Vol 6 (2) ◽  
pp. 149-159
Author(s):  
Ummi Suraya
Keyword(s):  
Aquatic Plants ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Pistia Stratiotes ◽  
Salvinia Molesta ◽  
Leersia Hexandra ◽  
Water Plants

The aim of this research is to identify and to inventory water plants in Hanjalutung Lake,Petuk Ketimpun Village, Jekan Raya District, Palangka Raya City. This research was conducted from December 2017 to January 2018. Sampling was carried out in 3 (three) stations, namely inlet ,middle and outlet. The tool used for aquatic plants 2 x 2 m transect.The results of research aquatic plants found in the waters of Lake Hanjalutung 7 (seven) types namely Kiambang (Salvinia molesta), gerigit/bite (Leersia hexandra), Cat Tail Grass (Utricularia aurea), Para Grass (Cyperus platystylis), Water Hyacinth ( Eichhornia crassipes ), Kiapu (Pistia stratiotes) dan Ketanan (Polygonum sp).

scholarly journals Chemicals with a natural reference for controlling water hyacinth, Eichhornia crassipes (Mart.) Solms

2015 ◽  
Vol 55 (3) ◽  
pp. 294-300 ◽  
Author(s):  
Tarek Abd El-Ghafar El-Shahawy
Keyword(s):  
Acetic Acid ◽  
Citric Acid ◽  
Formic Acid ◽  
Propionic Acid ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Effective Control ◽  
Acid Mixture ◽  
Aquatic Weeds ◽  
Herbicide Glyphosate

AbstractLife cannot exist without water. Appropriate management of water, from the water’s source to its utilization, is necessary to sustain life. Aquatic weeds pose a serious threat to aquatic environments and related eco-environments. Short- and long-term planning to control aquatic weeds is extremely important. Water hyacinth,Eichhornia crassipes(Mart.) Solms, is one of the world’s worst pests with a bad reputation as an invasive weed. In this study we are seeking the possibility of using certain chemicals with a natural background, for controlling water hyacinth since there is a delicate balance that needs to be taken into account when using herbicides in water. Five compounds, namely: acetic acid, citric acid, formic acid, and propionic acid, in three concentrations (10, 15, and 20%) were applied (i.e. as a foliar application under wire-house conditions) and compared with the use of the herbicide glyphosate (1.8 kg ∙ ha−1). All of the five compounds performed well in the control of the water hyacinth. As expected, the efficacy increased as the concentration was increased from 10 to 20%. With formic and propionic acids, the plants died earlier than when the other acids or the herbicide glyphosate, were used. Acetic acid came after formic and propionic acids in terms of efficacy. Citric acid ranked last. Formic acid/propionic acid mixtures showed superior activity in suppressing water hyacinth growth especially at the rate of (8 : 2) at the different examined concentrations (3 or 5 or 10%) compared to the formic acid/acetic acid mixtures. Using the formic acid/propionic acid mixture (8 : 2; at 3%) in the open field, provided good control and confirmed the viability of these chemicals in the effective control of water hyacinth. Eventually, these chemical treatments could be used on water for controlling water hyacinth. In the future, these chemicals could probably replace the traditional herbicides widely used in this regard. These chemicals are perceived as environmentally benign for their rapid degradation to carbon dioxide and water. For maximum efficiency thorough coverage especially in bright sunlight is essential.

scholarly journals Feasibility of using Problematic Aquatic Weeds in Productive Manner by Generating Vermicompost in Coconut Triangle Area of Sri Lanka

CORD ◽  
2017 ◽  
Vol 33 (1) ◽  
pp. 15
Author(s):  
S.H.S. Senarathne
Keyword(s):  
Sri Lanka ◽  
Nitrogen Content ◽  
Eichhornia Crassipes ◽  
Growth Parameters ◽  
Organic Fertilizer ◽  
Productivity Loss ◽  
Biological Properties ◽  
Aquatic Weeds ◽  
Salvinia Molesta ◽  
Guinea Grass

Aquatic weeds cause severe productivity loss in agriculture. These plants invade lakes, ponds, rivers, canals and agricultural fields, becoming noxious weeds. The study was conducted at the vermicomposting unit of the Coconut Research Institute, Lunuwila, in the Low country Dry Zone of North Western province of Sri Lanka from August 2012 to May 2013 to find out the feasibility of producing vermicompost from three aquatic weeds; Salvinia molesta, Eichhornia crassipes and Lagenandra toxicaria. Vermicompost and compost were prepared separately from aquatic weeds and Gliricidia and Guinea grass combinations. During the vermicomposting process, growth parameters of earthworms; number of earthworms, was taken in every ten days interval further, physical, chemical and biological properties of compost and vermicompost were analyzed. Experiment was carried out in a Complete Randomized Design (CRD) with eight treatment and five replicates in each treatment. Eichhornia and Salvinia recorded the highest adult earthworm number and juvenile number with the lowest mortality rate. Electrical conductivity (6.75 dSm-1), organic carbon (13.21%), phosphorous (3.61%), potassium (5.03%) and calcium (6.12%) were significantly high in Lagenandra toxicaria, Gliricidia and Guinea grass treatment was significantly high in nitrogen content (3.93%) and low in C: N ratio (2.51), compared to aquatic weeds. Salvinia showed comparatively higher nitrogen content and lower C: N ratio among aquatic weeds. Both Eichhornia and Lagenandra showed significantly higher microbial activity. Vermicompost was superior in all the properties compared to compost in the same substrate. The study revealed that aquatic weeds such as Salvinia molesta, Eichhornia crassipes and Lagenandra toxicaria which are readily available in the coconut triangle can be successfully used to produce Vermicompost. It can be concluded that the Vermicompost produced from aquatic weeds locally could be a suitable organic fertilizer for organic coconut farming in Sri Lanka.

scholarly journals Efektifitas Herbisida Formulasi pada Gulma Air di Lahan Rawa Tadah Hujan, Rawa Payau dan Saluran Drainase

2019 ◽  
Vol 47 (2) ◽  
pp. 210-216
Author(s):  
Risvan Anwar ◽  
Eka Suzanna ◽  
Djatmiko Djatmiko ◽  
Windi Sambaz Dwi Andika ◽  
Dan M. Tanu Gartiwo
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Block Design ◽  
Coconut Water ◽  
Aquatic Weeds ◽  
Drainage Channel ◽  
Randomized Complete Block Design ◽  
Drainage Channels

A series of studies had been carried out to create new types of herbicides. The studies had found six formulations ofherbicides. This study aimed to determine the effectiveness of herbicides formulation in controlling aquatic weeds. Theexperiment used a randomized complete block design with seven herbicide formulations as treatments and three replications.The seven formulations of herbicide were: Unihaz 1, Unihaz 2, Unihaz 3, Unihaz 4, Unihaz 5, Unihaz 6, and a control(glyphosate 2 kg ha-1). The results of the study found that there were 21 species of weed in rainfed swamps, ten species inbrackish swamps and one species namely water hyacinth (Eichhornia crassipes) in drainage channel. Herbicide formulationsof Unihaz 3, 4, 5, and 6 were effective in controlling aquatic weeds in rainfed swamps. Herbicide formulations of Unihaz 2, 3and 5 were effective in controlling aquatic weeds in brackish swamps. All herbicides formulations were effective in controllingweeds in drainage channels. Moreover, herbicide formulation of Unihaz 5 was more effective in controlling aquatic weeds inrainfed swamps, brackish swamps and drainage channels than other formulations, and it was not significantly different fromthe use of a glyphosate dose of 2 kg ha-1.Keywords: Eichhornia crassipes, fermented coconut water, organic herbicide, new types of herbicides

scholarly journals Biocomposites from anaerobically digested Eichhornia crassipes ((Mart.) Solms), as an alternative solution for the post-phytoremediation process

2021 ◽  
Vol 2 (2) ◽  
pp. 139-144
Author(s):  
Gabriella Marsaulina ◽  
◽  
Taufik Taufikurahman ◽  
Andira Rahmawati
Keyword(s):  
Anaerobic Digestion ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Chromium Content ◽  
Liquid Waste ◽  
Absorption Capacity ◽  
Cow Dung ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Water Hyacinths

Water hyacinth (Eichhornia crassipes) is a plant species commonly used for phytoremediation to reduce high chromium content in tannery liquid waste in Garut, West Java. Water hyacinth materials harvested from the phytoremediation can be used for the anaerobic digestion process to produce biogas and bio-slurry. This study aimed to determine the reduction of chromium content found in water hyacinths due to the anaerobic digestion process, and utilization of bio-slurry from the anaerobic digestion process as a biocomposite material. The anaerobic digestion process was carried out for 33 d using biodigesters and the composition of the biodigesters were varied into 100% dried water hyacinths and 80% water hyacinths with the addition of 20% cow dung. The bio-slurry from the anaerobic digestion process was then used for making biocomposites with 3 different compositions, i.e., 75 and 25%; 50 and 50%; and 25 and 75% of cement and bio-slurry, respectively. The average chromium content found in water hyacinths from the phytoremediation process without anaerobic digestion process was 41.964 mg/l. The results show a reduction in the amount of chromium after the anaerobic digestion process was found in each composition of bio-slurry, which were 15.979 mg/l (100% water hyacinth) and 14.861 mg/l (80% water hyacinth + 20% cow dung). Biodigester with a composition of 80% water hyacinth + 20% cow dung produced the highest average volume of biogas which was 0.424 l. The biocomposite of 75% cement and 25% bio-slurry had the highest compressive strength value of 30.598 MPa and water absorption capacity of 37.25%. It can be concluded that biocomposite with the composition of 75% cement and 25% water hyacinth bio-slurry is promising to be used as an alternative material for buildings.

Eradication programme for four noxious weeds in New Zealand

2013 ◽  
Vol 66 ◽  
pp. 40-44
Author(s):  
E.Yamoah NA ◽  
G.S.C. Gill ◽  
E. Massey
Keyword(s):  
Water Hyacinth ◽  
Active Sites ◽  
Eichhornia Crassipes ◽  
Sorghum Halepense ◽  
Salvinia Molesta ◽  
Eradication Programme ◽  
Noxious Weeds ◽  
The Past ◽  
Johnson Grass ◽  
Educational Campaigns

The Ministry for Primary Industries (MPI) has targeted Salvinia molesta (salvinia) Eichhornia crassipes (water hyacinth) Sorghum halepense (Johnson grass) and Moraea flaccida (cape tulip) for eradication under the national interest pest response (NIPR) programme These weeds are both notifiable and unwanted organisms under the Biosecurity Act 1993 The NIPR eradication programme consists of educational campaigns; enforcement of the Biosecurity Act which prohibits propagation planting sowing sale and distribution of the weeds; removal and destruction of the weeds from known infested sites; and monitoring those sites for regrowth Assessment over the past two decades shows that Johnson grass and cape tulip have responded well to management As at 2013 the number of active Johnson grass sites has reduced by 100 and cape tulip by 74 The number of active sites for water hyacinth and salvinia however keeps rising and falling thus prolonging eradication

scholarly journals Design and Fabrication of an Automatic Water Hyacinth Removal and Prevention Machine

2020 ◽  
Vol 9 (5) ◽  
pp. 450-454
Keyword(s):  
Water Pollution ◽  
Continuous Flow ◽  
Water Hyacinth ◽  
Storage Tank ◽  
Eichhornia Crassipes ◽  
Aquatic Weeds ◽  
Chain Drive ◽  
Drain Water ◽  
Biological Removal ◽  
Entire World

Water Hyacinth scientifically called as Eichhornia Crassipes has been a problem throughout the entire world in terms of water pollution and flow of water. In any country, continuous flow of water in its water bodies is always necessary in order to drain wastewater and supply water to all the places of the country. Out of the four major methods present to drain water Hyacinth, Mechanical and Biological removal of the plant are the most effective methods. The aim of this project is to design and develop a water Hyacinth removal and prevention machine which can effective collect the aquatic weeds, shred them in large quantities and prevent them from growing again. The major components used in the development of this machine are ramp cutters, guide vanes, propellers, boat base, chain drive, storage tank and a motor.

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