Water Hyacinth Research Articles

Detoxification of water hyacinth hydrolysate mediated by exopolysaccharide-based hydrogel enhances hydrogen and methane production

In this study, the exopolysaccharide from cyanobacteria was used for detoxification of acid hydrolysate of water hyacinth biomass. Exopolysaccharide-hydrogel showed phenolics and furans removal of 86 % and 97 %, respectively, with sugar recovery of 98.3 %. The fermentation of detoxified acid hydrolysate was integrated with that of pretreated biomass subjected to enzymatic saccharification derived from commercial cellulose (ESF) or from microbe (MSF). The maximum hydrogen production of 69.2 mL/g-VS was obtained in MSF, which is 1.2- and 1.6-fold higher than ESF and undetoxified acid hydrolysate, respectively. Additionally, the methane production of 12.6 mL/g-VS by mixed methanogenic consortia was obtained using the spent liquor containing volatile fatty acids. This enhanced hydrogen and methane production in subsequent microbial processes is mainly attributed to the selective removal of inhibitors in combination with an integrated carbohydrate utilization.

Inovasi Pemberdayaan Usaha Mikro Kecil Kerajinan Eceng Gondok melalui Digital Marketing

Purpose – The purpose of this community service activity is to provide education to the residents of Dusun Tapen, especially the Water Hyacinth Craftsmen of Cempaka Tapen, to enhance the digital marketing of their products. In this activity, we also aim to encourage the local government to support Cempaka Tapen's handicraft business so that it can become a Village-Owned Enterprise (BUMDES) and further advance and develop. Design/methodology/approach – This community service activity consists of several stages of activities: (1) Observation, using interview and field survey methods; (2) Formulation of activities, as a follow-up to the observation; (3) Dissemination/Socialization to the residents; and (4) Facilitation of infrastructure and facility assistance. Findings – The impact of implementing this activity is the establishment of social media accounts for Cempaka Tapen's SMEs. Entrepreneurs can operate social media effectively, and engagement with these SMEs has increased. Additionally, the local government has begun considering the establishment of a BUMDES, even though the results are not yet visible. Originality/value - The originality of this activity is in the research object and location. This activity focuses on the capacity development of human resources in Cempaka Tapen's SMEs, as one of the SMEs in Dusun Tapen, to introduce digital marketing and apply it to the sales process.

Identity of Handling Water Pollution Caused by Petroleum Pollution in Indonesia by Adsorption: A Review

Indonesia is a maritime country known for its vast territorial waters of sea, reservoirs, rivers, lakes, and bays compared to its land area which makes Indonesia rich in natural resources of sea and other waters. However, many problems are faced when preserving the sea such as marine pollution in the form of petroleum spills which are very dangerous for marine ecosystems. Therefore, there needs to be a handling effort to overcome this. The purpose of this research is to provide information about handling by adsorption to overcome petroleum pollution. The preparation method is carried out by analyzing articles from various literature sources such as journals, scientific papers, report books, and Google Scholar. The conclusion is that the treatment that can be applied to overcome the pollution of the sea and other waters due to petroleum in Indonesia by adsorption using activated carbon cassava peel, cocoa pod skin, water hyacinth, banana peel, and banana stem is classified as effective, efficient and economical management and has its advantages in reducing the levels of parameters contained in petroleum waste.

Study of Ecofriendly Admixture in Concrete

To enhance workability and strength, water-reducing chemicals are commonly used, but their production emits CO2 and poses environmental and cost concerns. The research explores the potential of plant extract, specifically cypress extract, as an eco-friendly and cost-effective alternative admixture for concrete. Previous studies have shown positive effects of organic admixtures, including polysaccharides and bio-admixtures from water hyacinth, on concrete rheology and strength. This research aims to determine the viability of cypress extract as a sustainable admixture, offering an environmentally friendly solution to reduce reliance on imported, patented chemicals and mitigate the environmental impact of the cement industry.

Manufacturing and Characterization of Composite Boards from Corn Husk Fiber, Water Hyacinth Fibers, and Sawdust Using Epoxy Resin

Composite board has been made with corn husk fiber (CHF), water hyacinth fiber, and wood sawdust using epoxy resin as an adhesive. The composition of each fiberwas varied, and physical tests (density, porosity, water absorption, and thickness expansion) and mechanical tests (modulus of elasticity (MOE), modulus of rupture (MOR), and compressive strength) were carried out, and microstructure was analyzed using SEM-EDX. The results of testing the physical and mechanicalproperties with optimum results were density of 1.03 g/cm3, porosity of 10.48%, water absorption capacity of 10.22%, thickness expansion of 2.91%, MOR 256.05kgf/cm2, MOE 228 kgf/cm2 and compressive strength of 3.19 MPa. The results showed that the physical (porosity, absorption, and thickness expansion) and mechanical (MOR and compressive strength) tests met the standards of SNI 03-2105-2006, while the MOE test did not meet the standards. For density testing, it complies with SNI 01-4449-2006 standards. The composite board can be used as a substitute for wood for furniture materials.

Design and Electrical Characterization of Plant Microbial Fuel Cell (PMFC) Using Eichhornia crassipes by Varying the Electrode Distance and Effect Light of the Sun

The Plant Microbial Fuel Cell (PMFC) design using water hyacinth has been successfully created. The PMFC was then treated by varying the distance of the electrode and giving the effect of sunlight. The electrodes used are Cu-Zn pairs where the electrode distance varies, with values of 3, 6, 9, and 12 cm. Furthermore, the data was taken with PMFC conditions placed outside and indoors for 14 days (331 hours). The results showed that PMFC with an electrode distance of 3 cm produced a more excellent value of electrical power than the other electrode distances, which was 0.6786 mW on the second day at the 37th hour or in the afternoon at 13.00 WIB. In general, the electrical characteristics produced by PMFCs, which are affected by sunlight, produce greater electrical power than PMFCs indoors.

The Contribution of the Biota Diversity of Lake Toba to Indonesia's Biota Wealth

This study aims to analyze the contribution of the diversity of biota in the waters of Toba Lake to the richness of Indonesia's biota. Research is needed to analyze the diversity of Lake Toba water biota. In order to achieve this goal, data and information collected regarding the contribution of the diversity of Lake Toba waters to the richness of Indonesia's biota is used. Verification of the data and information obtained was carried out through literature study, document analysis, interviews and filling out questionnaires. The results showed that in the waters of the lake there are endemic fish species whose existence is currently almost extinct, namely Batak fish or "ihan" (Neolissochillus thienemanni) consisting of two species, namely: Lissochilus sumatranus and Labeobarbus soro. There are various types of aquatic plants such as various types of algae and water hyacinth. Apart from that, there are also various species of molluscs such as freshwater snails and clams as well as other aquatic animals such as frogs and eels. The aquatic biota of Lake Toba has an important role in maintaining the balance of the ecosystem and providing resources for the people around the lake and contributing to Indonesia's Biota Wealth.

Bioethanol production from water hyacinth with isolated thermophilic microbial consortium from Kenya

Bioethanol production from water hyacinth with isolated thermophilic microbial consortium from Kenya

The Effect of Water Hyacinth (Eichhornia crassipes) Organic Fertilizer on The Vegetative Growth of Carrot (Daucus carota), Royal Chantenay Variety

This study conducted in Gasabo District, Nyacyonga marshland aimed to investigate the effect of water hyacinth (Eichhornia crassipes) organic fertilizer on the vegetative growth of the Royal Chantenay variety of carrot (Daucus carota). The experiment was conducted using a randomized complete block design (RCBD) with three replications. Four treatments were applied: T1 (control, no fertilizer), T2 (NPK 17-17-17), T3 (25% water hyacinth organic fertilizer + 75% NPK 17-17-17), and T4 (50% water hyacinth organic fertilizer + 50% NPK 17-17-17). The growth parameters assessed included plant height, leaf number, and root diameter. Results showed that the application of water hyacinth organic fertilizer significantly influenced the vegetative growth of Royal Chantenay carrot plants. T3 and T4 treatments enhanced plant height, leaf number, and root diameter compared to the control (T1) and NPK 17-17-17 (T2). The highest vegetative growth parameters were observed in T4, indicating that a higher concentration of water hyacinth organic fertilizer positively affected the growth of carrot plants. The findings suggest that water hyacinth organic fertilizer can be a viable alternative to chemical fertilizers in promoting the vegetative growth of Royal Chantenay carrot plants. The utilization of water hyacinth as an organic fertilizer can contribute to sustainable agricultural practices by reducing dependence on synthetic inputs.

Geotechnologies in the Assessment of Eutrophication in the Barra Bonita Reservoir, São Paulo, Brazil

Objective: The objective of this study was to identify locations with higher eutrophication and, consequently, susceptible to the emergence of macrophytes in the Barra Bonita reservoir, SP. Theoretical background: The presence of macrophytes, such as Eichhornia crassipes, is influenced by ecological succession driven by human activities like introducing exotic species and discharging untreated nutrients. Effective management, including buffer zones, is suggested to reduce eutrophication, though some studies question their effectiveness on a large scale. Method: The analysis of the Normalized Difference Vegetation Index (NDVI) was conducted using remote sensing images obtained from Landsat 8 and 9 satellites. As a criterion for data acquisition, corresponding data for the study region were obtained over a one-year temporal scale with a maximum cloud cover of 0%. Results and conclusion: Analyzing the images, it is observable that the month of June 2023 exhibited areas with a higher vegetation index and, consequently, eutrophication processes. This trend gradually decreased in the months of August, September, and November. Research implications: The analysis of satellite images revealed specific patterns of eutrophication, suggesting a direct correlation between the geographical distribution of nutrients and the potential proliferation of macrophytes. Additionally, comparative studies of nutrient concentrations in tributaries indicate that urban pollution, besides affecting local water quality, contributed to eutrophication in the Barra Bonita reservoir. Originality/value: Through the NDVI, the eutrophication possibility in Barra Bonita’s Reservoir was evidentiated.

Sustainable Development of ZnO Nanostructure Doping with Water Hyacinth-Derived Activated Carbon for Visible-Light Photocatalysis.

Water hyacinth (Wh) is an aquatic weed considered a nuisance in agricultural and fishing activities. Therefore, this study proposed repurposing this plant into activated carbon (AC). First, the ZnO-AC was precipitated and applied as a photocatalyst for degrading methylene blue. The preliminary photocatalytic test under UV irradiation identified the optimum ZnO-AC photocatalyst to degrade methylene blue (MB). The ZnO-AC photocatalyst recorded the highest degradation rate constant of 11.49 × 10-3 min-1, which was almost two-fold higher than that of ZnO (5.55 × 10-3 min-1). Furthermore, photocatalytic degradation of MB and carbaryl under sunlight irradiation by ZnO-AC demonstrated degradation rate constants of 74.46 × 10-3 min-1 and 8.43 × 10-3 min-1, respectively. To investigate the properties of ZnO-AC, several techniques were performed. ZnO-AC and ZnO exhibited similar results in morphology, crystalline structure, and Raman characteristics. However, ZnO-AC presented smaller pore diameters than those of ZnO, which enlarged pore surface area, and the presence of carbon-related groups implied the presence of AC on ZnO-AC surfaces. This can be attributed to the presence of AC on the ZnO surface, increasing the capture of surrounding toxic molecules and elevating the reaction density. This mechanism is attributed to promoting the degradation of toxic molecules. Therefore, using Wh as a carbon source for the transformation of AC can alternatively solve the problems of aquatic weed management and carbon storage strategies, and the application of AC in ZnO-AC photocatalysts can enhance photocatalysis.

Phytoremediation of Hexavalent Chromium Using Aquatic Plants in Nickel Mine Waste

The abundant wealth that Indonesia has is very profitable. Wealth is not only from natural resources, but wealth or biodiversity is also able to make Indonesia an independent country in managing its environment. One of the varieties that can be utilized is the existence of aquatic plants that can be used in the restoration of polluted environments. The ability of plants to recover from pollutants is called phytoremediation. Hexavalent chromium/ Cr(IV) is a hazardous waste originating from the washing of ore/open pit waste from rainwater washing. The quality standard allowed for Cr (IV), according to the Minister of Environment Regulation No. 9 of 2006, concerning the Quality Standard of Wastewater for Nickel Ore Mining Businesses and/or Activities is 0.1 mg/L. Besides being used to reduce pollutant loads, this aquatic plant can also provide aesthetic value because it has a very beautiful shape, type, color, and flowers. The purpose of this research is to find out which plants can be used to reduce hexavalent chromium levels. Variations of aquatic plants that can reduce levels of hexavalent chromium which are harmful to living things include water hyacinth/Eichornia crassipes; water hyacinth; Kayambang/ Salvinia Cucullata; Kiambang/ Apu Wood/ Pistia Stratiotes; Hydrilla verticillata; Water Bamboo/Equisetum hyemale; Water spinach / Ipomoea Aquatica; and Sagittaria lancifolia. This aquatic plant can reduce Cr (IV) up to 99.5%. The ability of these aquatic plants not only to reduce Cr (IV) but also to reduce TSS, BOD, and COD and to neutralize pH. The combination of several aquatic plants also provides a high effectiveness value.

Optimization of solvothermal liquefaction of water hyacinth over PTFE-acid mediated kaolin catalyst for enhanced biocrude production

The invasive nature of water hyacinth and the need for renewable energy sources have necessitated this research. Catalyst development through enhanced pore structure and process parameters optimization are requirements for effective mass transport during the biomass valorization and improved biocrude formation during solvothermal liquefaction process. In this present study, the effects of temperature (250–340 °C), residence time (10–20 min) and catalyst loading (10–13 wt%) on biocrude, biochar, gas yield, and biomass conversion were optimized using a Box-Behnken experimental design. The developed catalyst through the application of polytetrafluoroethylene (PTFE) for pore structure enhancement was characterized using SEM, BET and XRD techniques. The process optimization found maximum biocrude yield (32.0 wt%), minimum biochar yield (19.4 wt%) and maximum conversion efficiency (80.6%) at 340 °C, 20 min residence time, and 13 wt% catalyst loading. The GC-MS result of the biocrude produced at the optimum conditions (13 wt% catalyst loading) consists of ketones (32.2%), acids (22.3%) and had 65.2% carbon, 7.3% hydrogen, HHV of 29.4 MJ/kg and H/C ratio of 1.34 while an increment in catalyst loading of 20 wt% enhanced the overall biocrude properties with HHV of 35.50 MJ/kg. This result depicts the suitability of the PTFE modified acid treated kaolin for high quality biocrude production through valorization of water hyacinth into a candidate for renewable energy material.

Bioethanol Production from Water Hyacinth (Eichhornia crassipes) using Different Microbial Inoculants

Water Hyacinth (Eichhornia crassipes) is a weedy lignocellulosic material which represents the best substrate for the production of bioethanol in tropical countries due to its more availability and more biomass yield. For the fermentation and bioethanol production from water hyacinth, the different bacterial and fungal inoculants were used. Water hyacinth was obtained from ukkadam-valankulam lake, Coimbatore. These leaves were washed properly to remove soil and contaminants and dried for 3 hours at 120°C. It was grained into a fine powder and sieved using 1.5µm in diameter nylon sieve. The sieved material was cultured using different microbial culture such as Aspergillus oryzae, Aspergillus niger and Saccharomyces cerevisiae. After 21 days incubation, the culture was distilled using rotary vacuum evaporator and the produced bioethanol was analyzed by Fourier-transform infrared spectroscopy (FTIR) technique. The previous report showed, less yield only obtained using water hyacinth, potato peels, cassava peel and millet husks but this study produced highest yield using water hyacinth. This study indicated that water hyacinth is mostly available aquatic plant for the production of ethanol. The aim of current work is to understand the usage of water hyacinth as main substrate for bioethanol production using fungal inoculum. The microbial inoculants used for current study reported more potential for the production of bioethanol. This current work gives more economical value to water hyacinths and it can be cleared from all the waterways.

Dampak Adanya Pertumbuhan Eceng Gondok dalam Skala Besar Terhadap Ekosistem di Kawasan Danau Toba

Lake Toba, as one of Indonesia's natural wonders, is experiencing serious challenges related to environmental damage and water pollution caused by the large-scale growth of water hyacinth. The growth of water hyacinth is the result of irresponsible human activities, such as the disposal of domestic, industrial, agricultural and other waste that enriches nutrients in lakes. The aim of this research is to investigate the impact of large-scale water hyacinth growth in Lake Toba on the lake ecosystem. By using B.F.'s behavioral theory. Skinner as a framework, this research identifies human behaviors that contribute to water hyacinth growth and evaluates interventions that may be needed to address this problem. The research method used is library and literature study, with behavioral theory analysis to understand the relationship between stimulus and response in the context of water hyacinth growth. The research results show that human behavior, such as waste disposal and daily activities, plays an important role in the growth of water hyacinth in Lake Toba. The negative impacts of growing water hyacinth include decreasing water quality, increasing nutrient content, and disturbing animal life in the lake. By better understanding the factors that influence the growth of water hyacinth and its impacts, it is hoped that more effective interventions can be designed to maintain the sustainability of the Lake Toba ecosystem.

Sustainable Synthesis of Biopolymer Polyhydroxybutyrate (PHB) from Agro-residue by Brevibacterium casei with Emphasis on Degradation Analysis

The Polyhydroxybutyrate (PHB) polymer is a biodegradable microbial polyester that is intracellularly accruing due to the depletion of nitrogen and phosphorous resources and an increase in carbon supply. As part of this research investigation, Sudan Black B staining, fermentation, chloroform-sodium hypochlorite solvent-based extraction, and characterization of extracted PHB were used to isolate and identify organisms capable of producing PHB. Brevibacterium casei (OQ519751) was used to synthesize PHB biopolymer from agro-residues (orange peel, mangosteen peel, sugarcane bagasse, water hyacinth, and jackfruit peel). Using the Response Surface Methodology (RSM) and the Central Composite Design (CCD) has proven to be highly effective for optimizing PHB synthesis. The optimal conditions determined through RSM allowed Brevibacterium casei to produce significant amounts of PHB when compared to an unoptimized medium. The model demonstrated statistical significance, as indicated by the F-value of 19.96 with an associated p-value of <0.0001. Furthermore, with an optimized pH level of 7, temperature of 37°C, and yeast extract as the nitrogen source, the carbon source water hyacinth was found to synthesize an enhanced quantity of a PHB yield of 1.29 g/L from 2.2 g/L of dry biomass (58.63%). PHB characterization was done with the aid of FTIR (Fourier-transform infrared spectroscopy), XRD (X-ray diffraction), and TGA (Thermogravimetric analysis) analysis. The degradation study of PHB films was performed by soil burial method and morphological changes were scrutinized by SEM analysis. The results reveal that utilizing water hyacinth as a feedstock employs an enhanced production of PHB. This is the first report to synthesize maximum yield of PHB from Brevibacterium casei using water hyacinth as a substrate for production.

Efficacy of Water Hyacinth as Growing Media for Amaranthus in Open Water Culture, Hydroponics and Land Cultivation in Kuttanad Ecosystem

A field experiment was conducted in farmer’s field in north Kuttanad during the kharif season during June-July 2023 and repeated consecutively during August-September 2023 to evaluate the efficacy of open water culture with respect to yield and growth attributes of amaranthus cultivation against deep water culture hydroponics with and without water hyacinth as medium. The experiment was laid out in a Randomized Design (CRD), comprising six treatments with four replications. The treatments were T1: Open water culture without medium, T2: Open water culture with medium, T3: Hydroponics without medium, T4: Hydroponics with medium, T5: Land cultivation with a bed of water hyacinth alone as medium and T6: Control: soil culture-KAU-POP recommended dose of nutrients. The data revealed significant differences in plant height, number of leaves, leaf length and width, leaf area index, stem girth, root length and yield. Maximum plant height was recorded in T6 (Control- soil culture-Kerala Agricultural University (KAU) -POP recommended dose of nutrients) followed by T5 (Land cultivation with a bed of water hyacinth alone as medium). Highest leaf area index, stem girth and root length were in T6, but was on par with T5. The yield of the total harvest was significantly higher in T6, but was on par with T5, which proves the efficacy of water hyacinth as a growing medium for amaranthus cultivation. The lowest yield and growth attributes were recorded by T1 (Open water culture without medium) and T3 (Hydroponics without medium).

BIOCHAR AS A POTENTIAL SOIL CONDITIONER IN SALINE PRONE COASTAL AREA OF BANGLADESH

In the coastal areas of Bangladesh, salinity restricts normal crop production and increases with the desiccation of the soil. Recently, biochar has received great attention as a soil amendment to mitigate the detrimental effects of salinity stress. In this respect, a field experiment was conducted to examine the effects of biochars on soil properties and growth of okra (Abelmoschus esculentus L.) and to identify a suitable biochar amendment for salt-affected soils in coastal areas of Bangladesh. The experiment was conducted in a randomized complete block design (RCBD) with five replications. Three types of biochar (rice straw biochar, sawdust biochar and water hyacinth biochar) were applied @ 10 t ha-1 in a silt loam soil along with the control. Results showed that biochar application to the soil enhanced plant height, leaf number, leaf area, shoot fresh weight, shoot dry weight and yield of okra as well as improving the soil quality e.g. field capacity (FC), CEC, OC, total N, available P, S, K, and Ca. The application of water hyacinth biochar improved almost all of the growth and yield attributes of okra along with most of the soil properties than that of others. The results suggest that water hyacinth biochar might be recommended as a suitable soil amendment for better crop growth and soil quality. Moreover, water hyacinth biochar had significantly (P<0.001) higher surface area (205.40 m2g-1); consequently, higher capacity in salt and water adsorption which might prevent soil desiccation. Side by side, it significantly (P<0.001) increased the soil Ca content which might replace Na+ in the root rhizosphere minimizing the Na+ uptake by plants. Taken together, water hyacinth biochar could also be the best choice of organic amendments to reduce the suppressing effect of salinity stress in coastal areas of Bangladesh.

Adsorption of Phosphate by Two-Step Synthesis of Ceramsite from Electrolytic Manganese Residue/Dredged Sludge.

Carrying out research on the management of electrolytic manganese residue (EMR) is necessary to maintain the environment and human health. The dredged sludge (DS) and water hyacinth (WH) generated from dredging projects are potential environmental threats, and therefore suitable methods need to be found for their treatment. In this study, ceramsite was prepared by a two-step low-temperature firing method using DS and EMR as raw materials, WH as a pore-forming additive, and aluminate cement as a binder for the adsorption of phosphorus from wastewater. The optimal ratio and process parameters of the ceramsite were determined by mechanical and adsorption properties. The static adsorption experiments were conducted to study the effect of ceramsite dosage and solution pH on the removal of phosphorus. At the same time, dynamic adsorption experiments were designed to consider the influence of flow rate on its actual absorption effect, to explore the actual effect of ceramsite in wastewater treatment, and to derive a dynamic adsorption model that can provide technical support and theoretical guidance for environmental management.

Utility of metagenomics for bioremediation: a comprehensive review on bioremediation mechanisms and microbial dynamics of river ecosystem.

Global industrialization has contributed substantial amounts of chemical pollutants in rivers, resulting in an uninhabitable state and impacting different life forms. Moreover, water macrophytes, such as water hyacinths, are abundantly present in polluted rivers, significantly affecting the overall water biogeochemistry. Bioremediation involves utilizing microbial metabolic machinery and is one of the most viable approaches for removing toxic pollutants. Conventional techniques generate limited information on the indigenous microbial population and their xenobiotic metabolism, failing the bioremediation process. Metagenomics can overcome these limitations by providing in-depth details of microbial taxa and functionality-related information required for successful biostimulation and augmentation. An in-depth summary of the findings related to pollutant metabolizing genes and enzymes in rivers still needs to be collated. The present study details bioremediation genes and enzymes functionally mined from polluted river ecosystems worldwide using a metagenomic approach. Several studies reported a wide variety of pollutant-degrading enzymes involved in the metabolism of dyes, plastics, persistent organic pollutants, and aromatic hydrocarbons. Additionally, few studies also noted a shift in the microbiome of the rivers upon exposure to contaminants, crucially affecting the ecological determinant processes. Furthermore, minimal studies have focused on the role of water-hyacinth-associated microbes in the bioremediation potentials, suggesting the need for the bioprospecting of these lesser-studied microbes. Overall, our study summarizes the prospects and utilities of the metagenomic approach and proposes the need to employ it for efficient bioremediation.