Amount Of Leachate Research Articles

Simultaneous Denitrification and Bio-Methanol Production for Sustainable Operation of Biogas Plants

This study was conducted to secure the sustainability of biogas plants for generating resources from food waste (FW) leachates, which are prohibited from marine dumping and have been obligated to be completely treated on land since 2013 in South Korea. The aim of this study is to reduce the nitrogen load of the treatment process while producing bio-methanol using digested FW leachate diverted into wastewater treatment plants. By using biogas in conditions where methylobacter (M. marinus 88.2%) with strong tolerance to highly chlorinated FW leachate dominated, 3.82 mM of methanol production and 56.1% of total nitrogen (TN) removal were possible. Therefore, the proposed method can contribute to improving the treatment efficiency by accommodating twice the current carried-in FW leachate amount based on TN or by significantly reducing the nitrogen load in the subsequent wastewater treatment process. Moreover, the produced methanol can be an effective alternative for carbon source supply for denitrification in the subsequent process.

Composting solid municipal waste, a determinant process for an integrated waste management

Composting municipal solid waste is a beneficial recycling tool. Its use in safe conditions in agriculture depends on the quality of the compost. Composting a maximum amount of greenery and food waste (from households and institutions, courtyards, gardens, parks, markets and street waste) is one of the proposed targets for reducing biodegradable waste. The paper aims at presenting a model of the composting process in the best technical and environmental conditions. Considering that for Romania, the most important issue to be addressed is the reduction of the amount of waste to be deposited; this can be done through a real selective collection and the production of compost from biodegradable waste. If the sorting of biodegradable waste is done at the site of production to obtain compost, that means not only the reduction of the amount of waste to be deposited but also a source of money, and the amount of leachate and biogas produced would be much diminished. Also, the presence of the specific creatures of this ecosystem would decrease considerably. Taking into account the limited nature of natural resources, the recovery, regeneration and sustainable use of resources are the essential elements of an environmental policy. Composting thus provides the opportunity to create SMEs as well as to increase employment and professional qualifications. Not all wastes have to be dumped, they can be utilized, separated and thus large amounts of raw materials and energy resources can be saved, and the area occupied by landfills can be reduced. In the waste management process, an important role is played by the local public authorities (municipalities and local councils), who have the obligation to collect selectively and transport in time the entire quantity of waste produced.

Hydrological aspects of an industrial landfill

A water balance for a landfill in the South-West of Sweden has been performed. The waterbalance is based on measured values of leachate and calculated values of potentialevaporation using Penman's equation. The calculations include a period of 6 years (1995-200 I). During this period, the yearly precipitation was 6 I 0-1180 mm in the Halmstad area. Itwas concluded that the total storage of leachate in the landfill and in the ponds increased withtime. If increasing tendency will proceed then the amount of leachate generated might behigher during the next years and similar to results found in the literature. There is a need forthe more physical based model, the Hydrologic Evaluation of Landfill Performance (HELP)model, for calculation in order to take into account the top cover soils and vegetationinfluence.

Optimization of operations for nitrous oxide production and mitigation in aerobic and Aerobic-Anaerobic landfill method on MSW degradation

N2O is a potent greenhouse gas, induced by aeration coupled with leachate recirculation in Municipal Solid Waste (MSW) landfills. In this study, N2O emission was measured in the aerobic and Aerobic-Anaerobic Landfill Method (AALM) with or without leachate recirculation at two aeration rates in synthetic MSW. The experiment was carried out for six Plexiglass® landfill simulation reactors. Low aeration (1.6 l/kg-DM/h) was supplied in RLA, RLAA (Recirculatory) and LAA (non-recirculatory) reactors, while an aeration rate three times higher (4.8 l/kg-DM/h) was performed for RHA, RHAA, and HAA reactors. Based on the supplied leachate quantity, leachate recirculation was performed in five different phases. The results showed that a significant amount of N2O was produced in all reactors. The largest N2O emission of 0.11 and 0.13 g/kg-DM were observed in the RHA and RHAA reactors, respectively. Higher N2O and cumulative GHG was produced in high aeration reactors compared to the low aeration reactors. Recirculated leachate promoted waste stabilization, as reflected in the diminishing CH4 production and other leachate pollutant parameters, especially NH4+-N. It has been evaluated that in the operative or newly placed waste landfill, in-situ aeration with leachate recirculation exhibits the significant N2O production. However, lower amount of leachate in the later stage beneficial to inhibit the N2O production. It is recommended that in-situ aeration will become more effective after the recovery of CH4 from newly placed waste in an operative landfill for net GHG reduction, especially N2O reduction and early stabilization of landfills.

Designing of local constructions for decontamination and leachate recirculation at municipal solid waste landfills

The article discusses the results of studies on the design of a system for managing the leachate at the municipal solid waste storage facility (MSW landfill) in 4 km southeast from Ketovo, Ketovsky district of the Kurgan region with the possibility of using the hydrobotanical method and recycling the leachate. The work was carried out within the framework of the research of the Perm State Agricultural Academy, Contract 15/13 and PNRPU Contract No. 2013/379, as well as the license agreement under the patent RF 2162059. The article describes the main stages of designing a system for handling the leachate at the designed MSW landfill. The dynamics of formation of leachate is shown and the forecast of changes in the amount of leachate for the period of the landfill operation is presented. Seasonal changes in the amount of leachate under different conditions in the Kurgan region are shown. The calculations were performed in the “Ecolog” program, which allows to determine the performance of local structures for clearance and recycling of the leachate of MSW.

Investigation of Leachate Characteristics in Field-Scale Landfill Test Cells

This paper evaluates leachate recirculation and the impact of aeration on waste decomposition rate by means of leachate quality and quantity in field-scale landfill test cells. Four landfill test cells with the dimensions of 20 m × 40 m × 5 m were constructed in Komurcuoda Sanitary Landfill, Istanbul, Turkey. Solid wastes representing Istanbul Asian side waste characteristics were landfilled in the test cells and the test cells were operated simulating anaerobic landfilling (AN-1), leachate-recirculated anaerobic landfilling (AN-2), semi-aerobic landfilling (A-1) and aerobic landfilling (A-2) methods. Alternative landfilling methods for accelerating solid waste stabilization in landfills were investigated by means of leachate quantity and quality. The study indicated that aeration (forced or natural) and leachate recirculation accelerate the biodegradation rate of the waste. High biodegradation rates of MSW eventually provide a reduction in the contaminant life span of the landfill and decrease the cost of long-term monitoring. Results show an important and rapid development in leachate quality with a reduction in the treatment costs in aerobic landfill sites. Many important advantages can thus be achieved especially in the aerobic or semi-aerobic landfill sites noting that leachate recirculation seems to be an effective solution to reduce the stabilization time and provide in situ treatment of leachate when the aerobic landfilling cannot be applicable.

Purification of landfill leachate with the reverse osmosis and nanofiltration membrane process - practical experiences and results with regard to applications in Scandinavia

The most important membrane process for purification of landfill leachate is reverse osmosis. With this technology the negative impact of leachate on the environment can be nearly fully eliminated. The first large-scale plants went into operation in the mid eighties. Today, approximately one third of the installed capacity worldwide bases on this technology. Based on experiences with numerous systems which have been in operation for many years, results concerning the main parameters such as COD, ammonia etc. are presented. Depending on how the permeate is discharged, either directly into a surface water or indirectly into a municipal sewage treatment plant (i.e. RO works as pre-treatment), excellent quality parameters for the permeate may be achieved. With such systems working within a pressure range up to 65 bar, recovery rates between 65% and 80% permeate may be achieved with leachates with normal salt concentrations. In order to achieve higher recovery rates, the treatment of landfill leachate by RO has been significantly improved by the introduction of high-pressure osmosis. This results in a minimised concentrate amount which considerably eases disposal. The utmost reduction of concentrate is achieved in the additional combination with nanofiltration which may yield a recovery rate of more than 90%. The application of nanofiltration makes sense for the concentration of such leachates where not the osmotic pressure due to high salt concentration but the presence of membrane sealing factors such as earth alkaline ions limit the recovery rate. Nanofiltration selectively retains two or more valent ions and thus enables high concentration factors to be achieved. For Scandinavian applications with dilute leachate simpler concepts with single stage units have been realized. By demonstration and commercial size applications it could be proven that such membrane systems are suitable for purifying high amounts of leachate with low concentration of salt and organic components.

Physical and chemical treatment of landfill leachate - recycling of nitrogen

This paper presents a new type of plant to treat leachate from a municipal landfill. The plant is situated in Eskilstuna (pop. 90 000) a town-situated approx. 110 km west of Stockholm. The main purpose of the plant is to reduce nitrogen, phosphorus, COD and heavy metals in the leachate from the Lilla Nyby landfill in Eskilstuna. Lilla Nyby landfill is a municipal landfill, which has been used for nearly 50 years to deposit industrial and municipal waste from the Eskilstuna community. A drainage system in the landfill collects the leachate which is stored/equalized in a basin with a maximum volume of 40 000 m3 . The yearly amount of leachate is about 120-160 000 m3 • The leachate is pumped to the treatment plant. The demands of the authority to meet are as follows: NH3 (ammonium nitrogen) < 25 mg/I COD < 200 mg/I Total phosphorus (tot-P}< 0,3 mg/I The normal composition of the untreated leachate is NH3 (ammonium nitrogen)e- 250 mg/I COD - 400 mg/I Total phosphorus (tot-P)- 1,0 mg/I Thus it is necessary to reduce the ammonium nitrogen with -90% and COD with -50%. A request of a total tender with function warranty was made 2001. 6 contractors offer tender, 3 tenders are judged to be interesting, Pronea, Lackeby and Stork Engineering. Pronea offers chemical precipitation+ammonia-stripping/ absorption+activated coal-filtration, Lackeby offers SBR-treatment alt. NF+ ammoniastripping/ absorption and Stork offers evaporation or reversed osmosis RO). After a technical/economical evaluation the Pronea offer was considered to be the most interesting and was purchased. The process produces a useful chemical, ammonium sulphate, which can be used as an additive to the bio fuelled (wood chips) boiler in Eskilstuna. Two useful results will be reached: l) The corrosion in the furnace caused by alkali metals will be reduced and 2) the ammonia additive to reduce NOX in the flue gases can be reduced. The plant works as follows: 3 • Leachate is pumped to the plant (dim. capacity 20 m /h) • Reduction of pH to 3 with sulphur acid and CO2-stripping (reduce the buffer capacity) • Rise of pH to 11,0 with sodium hydroxide and precipitation with ferric chloride (FeCb). Dosage of polymers to enhance the build up of flocks. • Flock separation in lamella separator • Further flock separation in continuous sand filter • Rise of temp. to 50-60 0C through heat exchange • Ammonia-stripping + ammonia-absorption • Filtration in activate coal filter+ pH-adjustment Nitrogen in the leachate (ammonium nitrogen) together with sulphuric acid forms ammonium sulphate, at a concentration of 40% The plant is not yet approved and taken over by the purchaser. Much work has been needed to trim the process in the plant. A lot of problems have appeared and been solved. Some examples of the most essential items: • Foam forming after the CO2-stripper • Transport of water drops from the ammonia-stripper to the ammonia-absorber • Break down of process pumps for leachate (carbonate deposits), dosage pumps and valves • Leakage of sulphuric acid and sodium hydroxide • Sludge escape from the lamella separator (bad separation) • Clogging in heat exchangers and stripper tower(carbonate deposits) • Wrong placed flow meters Preliminary results are: • At least 90% ammonia reduction is possible • Good phosphorus- and metal reduction • If approved COD-reduction can be reached is still to be proved • Good quality of produced ammonium sulphate • The need of chemicals and energy yet to be evaluated

Bioreactor landfill and cleaner production as adequate tools for the remediation of Palestinian landfills

Municipal landfills remain the predominant and most economical method of wastedisposal in Palestine; however present some potential public and environmental threats.This paper proposes a suggested bioreactor landfill project and presents the cleanerproduction as adequate remediation strategies for Palestinian landfills aiming atenvironmental protection and expansion of the landfills life cycle. The case of Ramallahmunicipal landfill (RML), one of the largest old uncontrolled, dumpsite in Palestine isdiscussed. The leachate quantity, characteristics, possible environmental impacts,leachate treatment and disposal and reasonable remediation options were investigated.Despite high organic contents in the municipal waste, the climate in Ramallah district(small annual rainfall, high evaporation rates and warm temperature) tends to produceconcentrated leachate and small leachate quantities. However, infiltration and dischargeof both leachate and stormwater without a prior reasonable treatment give rise to seriousenvironmental problems including aquatic and public health risks. Containment of olddumpsites, applying a bioreactor landfill approach with leachate treatment and recycling,waste recycling and cleaner production in the industrial sector form sustainable optionsfor environmental protection. Lastly, the feasibility and cost effectiveness of possibleremediation options are analyzed.

Growth of marine Vibrio in oligotrophic environments is not stimulated by the addition of inorganic iron

Phytoplankton growth in many high-latitude and equatorial regions of the world ocean is limited by low iron (Fe), while regions of lower nutrient upwelling and higher dust supply such as the subtropical gyres are typically not considered Fe-limited. Recent work which showed that adding Saharan dust leachate promotes blooms of Vibrio bacteria in the North Atlantic Ocean challenges this simple paradigm, because Fe is one of the most prevalent micronutrients in the leachate. We also find that adding high quantities of dust leachate to the North Atlantic near Bermuda stimulates Vibrio growth. However, inorganic Fe alone did not stimulate the growth of Vibrio in any of eleven field experiments in the North Atlantic, central North Pacific, or the coastal Pacific, suggesting that some other growth factor besides Fe is partially or completely responsible for the Vibrio growth response with added dust leachate. We consider the possibility that organic carbon, phosphorous, or other trace-metals in dust might have stimulated Vibrio growth either directly or indirectly. Laboratory culture experiments demonstrate that dust leachate can stimulate the growth of Vibrio even when sufficient Fe is present in the medium. Global modeling suggests that dust fluxes high enough to stimulate Vibrio growth are rare.

Impact of soil leachate on microbial biomass and diversity affected by plant diversity

High plant diversity is usually linked with high soil microbial diversity, which is hypothesized to be attributed to a high diversity of components in the soil leachate, but experimental evidence is scarce. The aim of this study was to determine if the variation in soil leachate caused by plant diversity could affect the soil microbial community. A microcosm experiment was conducted to determine the effect of plant diversity on the soil microbial community by measuring soil leachate in a gradient of plant richness from levels 1 (one species) to 3 (three species). Plant richness significantly affected the diversity of soil leachate and microbial communities. The amount and diversity of soil leachate, microbial biomass carbon (C), basal respiration, β-1,4-glucosidase activity, β-1,4-N-acetylglucosaminidase activity, bacterial biomass, fungal biomass, total microorganism biomass, and microbial diversity (Shannon diversity index and evenness) were highest at richness level 3. Changes in the microbial community were best explained by variation in the amount and diversity of leachate. Linear regression and correlation analyses indicated that leachate diversity had a close association with microbial Shannon diversity and evenness, whereas leachate amount had a close association with microbial biomass C, total microbial biomass, bacterial biomass, enzyme activities, and abundance of microbial groups. An ordinary least squares multiple regression and the structural equation model demonstrated that leachate amount had a greater effect on microbial biomass than leachate diversity, which had a greater impact on microbial Shannon diversity and evenness. Our results indicate that plant diversity drives changes in soil microbial communities by altering the amount and diversity of leachate in the soil. The diversity of soil leachate determined the diversity of the microbial community to some extent.

Ex situ simultaneous nitrification-denitrification and in situ denitrification process for the treatment of landfill leachates

The objective of this research was to investigate the ex situ simultaneous nitrification–denitrification (SND) and in situ denitrification process and to evaluate its application for treating landfill leachates at long-term operations. Based on the predicted contaminant concentrations, two sets of laboratory-scale bioreactor landfill systems (an ex situ nitrification and in situ denitrification bioreactor as well as an ex situ SND and in situ denitrification bioreactor) were operated continuously for about 48 weeks. The recirculated leachate quantity and effluent characteristics of leachates were regularly monitored and analyzed by using the standard method. The ex situ SND and in situ denitrification process obtained a better leachate removal performance compared with the ex situ nitrification and in situ denitrification process, while the ex situ SND process can reduce the energy costs. However, the leachate treatment performance of this process was generally unsatisfactory as the contaminant concentrations do not meet the discharge standard within the forecasted time. These results further proved that the effectiveness of the treatment decreases along with an increasing landfill age. Therefore, further research must be performed to optimize the treatment efficiency of the bioreactor.

Anaerobic/aerobic conditions determine antibiotic resistance genes removal patterns from leachate by affecting bacteria taxa-genes co-occurrence modules

Landfill treatment of municipal solid waste treatment produces a large amount of leachate, which has been an important hotspot of ARGs. This study aimed to investigate the ARGs removal potential, kinetics and mechanism from leachate in aerobic and anaerobic conditions. Simulated landfill reactors showed the efficacy in reducing ARGs, and the removal efficiencies depended on ARGs types and aerobic/anaerobic conditions. The ARGs tetQ and blaCTX-M were more likely to attenuate with the log-removal efficiencies of 1.50–3 order of magnitude. The ARGs removal kinetic was well fitted by modified Collins-Selleck model, and aerobic condition showed better removal capacities and kinetics than anaerobic condition. Among the ARGs with great removal performance, sul2, aadA1and blaCTX-M were eliminated from leachate and refuse simultaneously, but tetM, ermB, and mefA were removed from leachate but enriched in refuse. Aerobic/anaerobic states might drive the bacterial community shift of leachate and refuse, and topology property comparison of co-occurrence networks suggested that refuse had a closer non-random host relationship between ARGs and microbial taxa than leachate. Further module analyses revealed that ARGs removal efficiencies depended on the taxonomy of host bacteria in leachate, while the refuse taxa-ARGs correlation determined ARGs removal patterns. By selecting distinct bacteria cluster in different conditions, aerobic treatment benefited ARGs reduction in leachate and refuse, while anaerobic treatment enhanced the enrichment of ARGs in refuse. These findings can potentially foster the understanding of ARGs removal mechanism in biological treatment processes.

Accelerated aging periods and its effects on electric conductivity of popcorn seeds

The production of popcorn has an increasing demand and requires the use of vigorous seeds. The accelerated aging test is used to evaluate seed’s vigor, promoting the disruption of the membrane system. The disruption of membranes can be evaluated by the electrical conductivity test. The objective of this study was to evaluate the effects caused by different periods of accelerated aging and the ions in the exudate of the electrical conductivity test and its interactions with the physiological quality of popcorn seeds. The experimental design was completely randomized with seeds being submitted to eight accelerated aging periods (zero, 24, 48, 72, 96, 120, 144 and 168 hours). Water content (%), first count of germination (%), final germination (%), germination speed index, electrical conductivity (μS cm-1 g-1) and length of aerial portion and primary roots of seedlings were evaluated. The germination and vigor of popcorn seeds and the amount of leachate in the electrical conductivity test were influenced by the increasing exposure period to accelerated aging. The period of 72 hours of exposure to accelerated aging produces results that reflect on the vigor potential and leachate of the seeds.

Impacts of leachate of landfill on the groundwater hydrochemistry and size distributions and heavy metal components of colloids: a case study in NE China.

Colloids associated with heavy metals are ubiquitous in contaminated groundwater; waste accumulation at imperfectly sealed landfills can produce large amounts of leachate with colloids and heavy metal contaminants, which can pollute the downstream groundwater. In this study, three sites in a landfill were sampled to reveal heavy metal particle size distributions and their chemical compositions. The > 220nm particle sizes were the predominant size in the downstream groundwater, while the < 10nm particle sizes were the predominant size in the upstream groundwater. Total Fe increased from 35.5μg/L in the upstream groundwater to 107μg/L in the downstream groundwater. This increase was attributed to the enhanced migration and accumulation of colloids in the aqueous phase. The elements and the colloid size distribution in the landfill indirectly reflected the composition and degradation of the waste. Colloids played a key role in distribution of both solid particles and aqueous contaminants in the landfill. The results of this study will contribute to the knowledge of the effect of different contaminants in the vicinity of landfills without appropriate sealing systems.

DEVELOPMENT OF A METHOD FOR DESIGNING LEACHATE DESALINATION PROCESS USING LANDFILL CELL MODEL

During the design of leachate treatment plants at Japanese landfill sites, the main examined design parameters have been leachate treatment plant capacity and raw leachate quality. However, the scientific basis for characterizing raw leachate quality has been less robust, especially for the Cl− concentration. This characterization is usually based on the precedent of other operating leachate treatment plants. However, regarding the quantity and quality of leachate at landfill sites, there is a close relationship between these parameters and Cl content in waste cells or the waste cell placement method, and these parameters depend on the landfilling method, dilution zone (no dumping area), and the quantity of leachate. Based on the landfill shape, dilution zone (no dumping area), waste cell placement method, and property of the waste cell, the Landfill Cell Model can predict leachate concentration. In this research, we used a process of calculating leachate treatment plant capacity and the Landfill Cell Model together to investigate an early method for stabilizing landfill and dilution zones. The results revealed the possibility of characterizing the optimal leachate treatment plant capacity by balancing leachate reservoir capacity and the predicted Cl− concentration of raw leachate in landfill.

Quality and quantity of leachate with different ages and operations in semi-arid climate

Quality and quantity of leachate with different ages and operations in semi-arid climate

Landfill Final Cover Systems Design for Arid Areas Using the HELP Model: A Case Study in the Babylon Governorate, Iraq

The main purpose of selecting proper designs for landfills is to accommodate quantities of waste without having a negative effect on the surrounding environment and human health. The Babylon Governorate (province) in Iraq was taken as an example of an arid area with very shallow groundwater and where irregular waste disposal sites had developed that had not been subject to international standards when they were selected for landfill use. In the current study, the suggested design for landfills is a base liner and final cover system. In this suggested design, the final cover system allows for three scenarios. The first scenario considers an evapotranspiration soil cover (ET) (capillary barriers type), the second scenario is a modified cover design of “RCRA Subtitle D”, and the third scenario is a combination of the first and second scenarios. The HELP 3.95 D model was applied to the selected landfill sites in the governorate to check if there was any penetration of the leachate that might in future percolate from the landfill’s bottom barrier layer in arid areas. The results from the suggested landfill design showed that there was no leachate percolation from the bottom barrier layer using the second and third scenarios. For the first scenario, however, there was a small amount of leachate through the bottom barrier layer in the years 2013 and 2014.

Leachate generation rate modeling using artificial intelligence algorithms aided by input optimization method for an MSW landfill.

Leachate is one of the main surface water pollution sources in Selangor State (SS), Malaysia. The prediction of leachate amounts is elementary in sustainable waste management and leachate treatment processes, before discharging to surrounding environment. In developing countries, the accurate evaluation of leachate generation rates has often considered a challenge due to the lack of reliable data and high measurement costs. Leachate generation is related to several factors, including meteorological data, waste generation rates, and landfill design conditions. The high variations in these factors lead to complicating leachate modeling processes. This study aims at identifying the key elements contributing to leachate production and developing various AI-based models to predict leachate generation rates. These models included Artificial Neural Network (ANN)-Multi-linear perceptron (MLP) with single and double hidden layers, and support vector machine (SVM) regression time series algorithms. Various performance measures were applied to evaluate the developed model's accuracy. In this study, input optimization process showed that three inputs were acceptable for modeling the leachate generation rates, namely dumped waste quantity, rainfall level, and emanated gases. The initial performance analysis showed that ANN-MLP2 model-which applies two hidden layers-achieved the best performance, then followed by ANN-MLP1 model-which applies one hidden layer and three inputs-while SVM model gave the lowest performance. Ranges and frequency of relative error (RE%) also demonstrate that ANN-MLP models outperformed SVM models. Furthermore, low and peak flow criterion (LFC and PFC) assessment of leachate inflow values in ANN-MLP model with two hidden layers made more accurate values than other models. Since minimizing data collection and processing efforts as well as minimizing modeling complexity are critical in the hydrological modeling process, the applied input optimization process and the developed models in this study were able to provide a good performance in the modeling of leachate generation efficiently.

EFEKTIFITAS TUMBUHAN ENCENG GONDOK (EICHORMONIA CRASSIPES) SEBAGAI FITOREMEDIASI DALAM MENURUNKAN KADAR BESI (Fe), TIMAH HITAM (Pb), MANGAN (Mn) PADA LEACHATE TPA

This study aims at knowing the difference in decreased levels of iron (Fe), lead (Pb), and manganese (Mn) in leachate before and after treatment.&#x0D; Research used a true experimental design with pre-post test design. The amount of leachate that is used in each treatment is 10 liters of leachate and 1 kg of water hyacinth, and do in 3 times repetition. Analysis of the was tested using One Way ANOVA test followed by LSD (Least Significance Difference).&#x0D; The results showed that there were significant differences in the use of water hyacinth in the leachate decreased levels of iron (Fe), lead (Pb), and manganese (Mn) with a value of ρ = 0.000. Research results before treatment (pre-test) levels Fe = 6.30 mg / l, after treatment (post-test) Fe = 0.25 mg / l, before treatment (pre-test) value Pb = 2.90 mg / l, after treatment (post-test) and Pb = 0.33 before treatment (pre-test) the value of Mn = 2.68 mg / l, after treatment (post-test) Mn = 0.08 mg / l. It is known that the ability of water hyacinth weighing 1 kg with a time of 6 days is more effective than water hyacinth 2 days and 4 days in the lower levels of iron (Fe), lead (Pb) and manganese (Mn) in the leachate.&#x0D; It can be concluded that water hyacinth could reduce levels of iron (Fe), lead (Pb) and manganese (Mn) in the leachate with contact time 6 days.