Leachate Generation Research Articles

Effect of the recirculation of a reverse osmosis concentrate on leachate generation: A case study in an Italian landfill

“Fossetto” landfill has been operating in the municipality of Monsummano Terme (Pistoia Province, Italy) since 1988; the authorized volume for landfilling is about 1,000,000 m3; at the moment the plant is being mainly used to dispose of mechanically and biologically treated residual municipal solid waste. Since September 2006, an in-situ reverse osmosis leachate treatment plant has been operating to treat leachate. The treated water is being discharged into a small nearby stream while the concentrated leachate is being recirculated back into the landfill body following Italian Regulations and an authorization from the local authority (Pistoia Province). This paper presents monitoring results on leachate generation rates and composition for the past fifteen years. A moderate increase of the concentration of some of the monitored parameters occurred (e.g. ammonium, chlorides) and a decrease for most heavy metals. The increase of concentrations for Cl− and NH4+ was more evident in the leachate coming from the wells closer to reinjection area. However, the change in leachate composition did not affect the quality of the effluent from the leachate treatment plant. The annual volume of the generated leachate increased significantly right after the recirculation started.

Performance evaluation of a biological landfill leachate treatment plant and effluent treatment by electrocoagulation

A major problem in municipal waste landfills is generation of leachate, a dark black colored liquid with high concentrations of pollutants. The objectives of this study were to evaluate the efficiency of available leachate treatment methods at a biological treatment plant and the electrocoagulation (EC) process using aluminum and iron electrodes for treatment of effluent from the biological treatment plant. In this experimental study, leachate from the AqQala landfill in Gorgan was examined. Equipment for electrochemical unit included a power supply as well as iron and aluminum electrodes. The EC process was operated under different reaction times (20, 40, 60 min), pH values (3, 7, 9) and current densities (1.66, 3.33, 5A/m2 ). The results showed that the effluent from the biological treatment plant has high concentrations of organic matter similar to wastewater, and should therefore be treated before discharge to the environment. According to the results, increasing the reaction time or the current density in the EC process increases the removal efficiency. The EC process is suggested as an alternative treatment process with high efficiency for the removal of organic matter, nitrate, phosphorous and turbidity in sewage treatment, which could prevent water and soil pollution.

The Environmental Impacts of Kabd Landfill on the Soil and Groundwater in Kuwait: A Case Study

The environmental impacts of the Kabd Landfill on the soil and groundwater in Kuwait were evaluated. Physical and chemical analyses were carried out on thirty pairs of surface, subsurface soil and five groundwater samples. The groundwater samples are collected from boreholes nearby and downstream of the landfill while the soil samples collected along six profiles. The groundwater samples were geochemically analyzed to determine the total dissolved solids, cations, anions and heavy metals, particularly Iron (Fe), Copper (Cu), zinc (Zn), Cadmium (Cd), Nickel (Ni), Chromium (Cr) and Aluminum (Al), Lithium (Li), Boron (B), Fluoride (F) and Vanadium (V). The soil samples were geochemically analyzed to determine concentration of Cadmium (Cd), Lead (Pb), Nickel (Ni), Iron (Fe), Aluminum (Al) and organics. The results show that the soil and groundwater are contaminated with high TDS, Na, Ca, Mg, Cl, SO4 and heavy metals, especially Ni, Cd, Cu, Al, V and F. The heavy metal concentrations in both the soil and groundwater samples are compared to the World Health Organization (WHO) standard permissible limits. The results revealed that the Zn, Li, B and Fe metals are below the WHO limits for consumption. The soil lithology, natures of dumping, the depth of quarry and the depth to the groundwater level play roles in leachate generation and groundwater contaminations. Such leachate may be originated from the capillary fringe water, moisture content and rising water table, due to its close level at the bottom of the waste disposal site. The organic strength of the soil was reduced due to waste decomposition and continuous gas flaring. Re-designing of sanitary landfills to prevent leachate from getting to the groundwater and adoption of clean technology for a sustainable land management program for reclamation is recommended.

Comparative study of different Biological Processes for non-segregated Municipal Solid Waste (MSW) leachate treatment

Abstract In developing countries, leachate generation from open dumpsites poses a severe impact on health as well as on environment. There is an urgent need to nullify the effect of the leachate before it starts contaminating to water resources. The current study was designed to explore the biological method for the treatment of leachate and utilization of best treatment method at the industrial scale. This study was carried out at Municipal Solid Waste based 12 MW Waste-to-Energy Plant in Ghazipur, eastern part of Delhi, India. The chemically and anaerobically treated leachate samples were simultaneously subjected to three different treatment processes in isolation. The effect of different treatments (suspended growth with Activated Sludge Process; attached growth with Fixed Film; and combined treatment with Polyvinyl Alcohol Gel media) were analyzed. Experiential data were generated and analyzed and it revealed that of the three different processes tested on Indian MSW-leachate the efficiency of PVA Gel media was higher as compare to the other three methods. Analysis also showed that when PVA Gel process was clubbed with the conventional biological method, for large (industrial) scale application it resulted in lower CAPEX and OPEX.

Home composting using different ratios of bulking agent to food waste

The negative environmental impacts associated with home composting may be due to the absence of a defined operation criteria for the degradation process. In addition to the potentially low environmental impact in terms of energy and water usage, which is minimal to the manufacture of the composting unit and avoiding the processing and transportation of waste or byproduct, composting at home can also promote a reduction in the emission of unpleasant gases. The proportion of the food waste and bulking agents in the composting mixture may be decisive to fulfill good practices of waste stabilization. The aim of this study was to investigate how different ratios of bulking agent and organic household waste can affect the progress and outcome of the composting process. Three treatments, varying in the ratio of rice husk: raw fruit and vegetable leftovers (70:30, 50:50, 30:70; v:v) were used in a home composting system on a pilot scale. Results show that the proportion of starting materials used in the composting mixture influenced the degradation of organic matter, nitrogen dynamics of the process and its toxicity on germinating plants. The proportions with greater amounts of food waste had higher concentrations of mineral matter, higher peak temperature, and a better initial carbon-to-nitrogen ratio, while the proportion containing 70% of bulking agent lacked odors and leachate generation and showed a low nitrogen loss. A higher proportion of food waste presented better conditions for microbiological development and less time to obtain characteristics of matured composts. A higher proportion of bulking agents resulted in favorable conditions for household handling and less potential for environmental impacts.

Impact of landfill leachate on the germination of Cucumber (Cucumis sativus)

The generation of landfill leachate occurs due to the degradation of solid waste by the presence of microorganisms. The bioassays allow to understand the relationship between the medium and the leachate, determining the lethal concentration capable of inhibiting 50% of test organisms (LC50), the lowest concentration with observed deleterious effect (LOEC), and the highest concentration without observed deleterious effect (NOEC). This work aimed to determine the impact of landfill leachate on germination and development of radicle and aerial part of cucumber ( Cucumis sativus ) on two substrates. The design was completely randomized and 6 treatments with increasing doses (leachate + deionized water): T1 = 3.125% + 96.875%; T2 = 6.25% + 93.75%; T3 = 12.5% + 87.5%; T4 = 25% + 75%; T5 = 50% + 50% and T6 = 100% leached, and the control (TC) with 100% deionized water, both in triplicates for filter and soil paper substrates. Cucumber tolerance to leachate was identified. It was not possible to determine the LC50 from the treatments, however the 50% and 100% doses inhibited the germination by 83% and 100%, and the NOEC and LOEC values were identified in treatments 12.5%/25% and 25%/50% on filter paper and soil, respectively.

Leachate Characterization and Assessment of Surface Water Quality near Karadiyana Solid Waste Dump Site

Leachate generation is one of the major issues associated with open dumping of solid waste. In Sri Lanka, the most common practice of municipal solid waste handling is open dumping and the leachate generated from these sites create serious environmental and social problems. Therefore leachate should be treated before been discharged to the environment. When developing a sustainable leachate treatment strategy, leachate characterization is important in order to identify critical contaminants.Karadiyana solid waste dump site which is located in the Western Province is the second largest dumpsite in Sri Lanka. It receives 550 MT of solid waste daily from 7 local authorities in Colombo district. As this dumpsite is located in a highly urbanized and environmentally sensitive area which is adjacent to the Bolgoda river in Piliyandala it is essential to take measures to prevent adverse impacts of leachate. Therefore this monitoring study was carried out to identify the characteristics of leachate.Leachate samples and surface water were collected from 7 locations around the site for 10 months. Analysis was done on temperature, pH, conductivity, TDS, NO3-, BOD, COD, and heavy metals i.e. Cr, Zn, Cd, Pb and Ni.According to the results temperature, pH and concentrations of NO3-, Cr, Zn, Cd, Pb and Ni of all sampling locations were within the permeable levels of Sri Lankan standards. Heavy metal concentrations are very low which may be because this dump site only is not accepting industrial waste. However the conductivity, TDS, BOD and COD levels of all the locations have exceeded the tolerance limits significantly due to the municipal solid waste which consist of large portion of organic waste. Furthermore all the parameters are higher in leachate samples than surface water samples. This study reveals that an applicable leachate treatment system should be introduced in order to reduce BOD and COD levels.Keywords: Karadiyana dump site, Leachate, Solid waste

A sequential treatment of intermediate tropical landfill leachate using a sequencing batch reactor (SBR) and coagulation

The increase in landfill leachate generation is due to the increase of municipal solid waste (MSW) as global development continues. Landfill leachate has constantly been the most challenging issue in MSW management as it contains high amount of organic and inorganic compounds that might cause pollution to water resources. Biologically treated landfill leachate often fails to fulfill the regulatory discharge standards. Thus, to prevent environmental pollution, many landfill leachate treatment plants involve multiple stages treatment process. The Papan Landfill in Perak, Malaysia currently has no proper leachate treatment system. In the current study, sequential treatment via sequencing batch reactor (SBR) followed by coagulation was used to treat chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), total suspended solids (TSS), and colour from raw landfill leachate. SBR optimum aeration rate, L/min, optimal pH and dosage (g/L) of Alum for coagulation as a post-treatment were determined. The two-step sequential treatment by SBR followed by coagulation (Alum) achieved a removal efficiency of 84.89%, 94.25%, 91.82% and 85.81% for COD, NH3-N, TSS and colour, respectively. Moreover, the two-stage treatment process achieved 95.0% 95.0%, 95.3%, 100.0%, 87.2%, 62.9%, 50.0%, 41.3%, 41.2, 34.8, and 22.9 removals of Cadmium, Lead, Copper, Selenium, Barium, Iron, Silver, Nickel, Zinc, Arsenic, and Manganese, respectively.

Sustainable Impact of Landfill Siting towards Urban Planning in Malaysia

Landfill is one of the most common, widely used waste management technique in Malaysia. The ever increasing of solid waste has made the role of landfill become prominent despite the negative impacts that caused by the landfill is unavoidable. The public and government regulations are getting more aware with the negative impacts that could be brought by the landfill towards the community. It led to the cultural shift to integrate the concept of sustainability into the planning of siting a landfill in an urban area. However, current urban planning tends to emphasize more on the environmental aspect instead of social and economic aspects. This is due to the existing planning guidelines and stakeholder’s understandings are more on the environmental aspect. This led to the needs of incorporating the concept of sustainability into the urban planning. Thus, this paper focuses on the industry stakeholders view on the negative impacts that will cause by the landfill towards the urban planning. The industry stakeholders are those who are related to the decision-making in the selection of a landfill site in the government department. The scope of the study is within the country of Malaysia. This study was conducted through the semi-structured interviews with a total of fifteen industry stakeholders to obtain their perspective on the issues of impacts of siting a landfill in the urban area. The data obtained was analysed using the software, QSR NVivo version 10. Results indicate that landfill bought significant sustainability-related impacts towards landfill siting in urban planning. The negative impacts stated by the respondents are categorized under all three sustainable aspects such as environmental, social and economic. Among the results are such as the pollution, such as the generation of leachate, the objection in siting a landfill site against by the public, and the negotiating and getting money contribution from local authorities. The results produced can be served as a guideline for the industry stakeholders to have a holistic overview of the impacts that could lead by the landfill in siting into the urban area in terms of sustainability aspects. Moreover, it serves as a platform for the developing a holistic guideline for urban planning in the consideration of sustainability aspect of the selection for a landfill site.

Evaluation of the rotary drum reactor process as pretreatment technology of municipal solid waste for thermophilic anaerobic digestion and biogas production

Municipal solid waste (MSW) contains a large fraction of biodegradable organic materials. When disposed in landfills, these materials can cause adverse environmental impact due to gaseous emissions and leachate generation. This study was performed with an aim of effectively separating the biodegradable materials from a Mechanical Biological Treatment (MBT) facility and treating them in well-controlled anaerobic digesters for biogas production. The rotary drum reactor (RDR) process (a sub-process of the MBT facilities studied in the present work) was evaluated as an MSW pretreatment technology for separating and preparing the biodegradable materials in MSW to be used as feedstock for anaerobic digestion. The RDR processes used in six commercial MSW treatment plants located in the USA were surveyed and sampled. The samples of the biodegradable materials produced by the RDR process were analyzed for chemical and physical characteristics as well as anaerobically digested in the laboratory using batch reactors under thermophilic conditions. The moisture content, TS, VS and C/N of the samples varied between 64.7 and 44.4%, 55.6 to 35.3%, 27.0 to 41.3% and 24.5 to 42.7, respectively. The biogas yield was measured to be between 533.0 and 675.6 mL g−1VS after 20 days of digestion. Approximately 90% of the biogas was produced during the first 13 days. The average methane content of the biogas was between 58.0 and 59.9%. The results indicated that the biodegradable materials separated from MSW using the RDR processes could be used as an excellent feedstock for anaerobic digestion. The digester residues may be further processed for compost production or further energy recovery by using thermal conversion processes such as combustion or gasification.

The effects of temperature and wet-dry cycling on water-repellent soils

The synthetic modification of soils through the addition of organosilanes to create a water-repellent barrier is a developing area of geoenvironmental engineering research. Organosilane modification of soils can be used for different geotechnical aspects such as landfill covers to prevent infiltration of water into the subsurface waste layers and reduce leachate generation. Research was conducted to evaluate temperature effects on artificially induced water repellency of two different soils and an industrial by-product (coal fly ash). The stability of the water repellency was investigated through exposure of treated samples to wet/dry cycles. To determine the water entry pressure that a modified soil can sustain, soil samples were prepared in a permeameter and connected to a standpipe where water was introduced at a controlled rate. These trials were repeated for different temperatures of the water-soil setup. The stability portion of the tests involved cyclically saturating then drying samples while periodically measuring the effect on water entry pressure. Rainfall runoff depth estimates were combined with the temperature-dependent water entry pressure data for evaluating runoff due to water repellency.

Leachate generation from landfill in a semi-arid climate: A qualitative and quantitative study from Sousse, Tunisia.

Despite initiatives for enhanced recycling and waste utilization, landfill still represents the dominant disposal path for municipal solid waste (MSW). The environmental impacts of landfills depend on several factors, including waste composition, technical barriers, landfill operation and climatic conditions. A profound evaluation of all factors and their impact is necessary in order to evaluate the environmental hazards emanating from landfills. The present paper investigates a sanitary landfill located in a semi-arid climate (Tunisia) and highlights major differences in quantitative and qualitative leachate characteristics compared to landfills situated in moderate climates. Besides the qualitative analysis of leachate samples, a quantitative analysis including the simulation of leachate generation (using the HELP model) has been conducted. The results of the analysis indicate a high load of salts (Cl, Na, inorganic nitrogen) in the leachate compared to other landfills. Furthermore the simulations with HELP model highlight that a major part of the leachate generated originates form the water content of waste.

Simulation of Contaminants Transport and Groundwater Flow for Basrah Landfill Site

groundwater aquifers is mostly effected from landfills due to intrusion of leachate from its base b. Active surface of landfills represents main source for leachate generation during rains or may be due to direct contact with groundwater, leading to the transport 5 pollutants from landfill which is intrudes to the aquifer under the landfill. In this research a 3-dimensional simulation models was constructed and calibrated to characterize groundwater flow and leachate pollution transport from Basrah province main landfill site. The selected study area is Al-Rafdhia landfill site, which is lie at Al-Zubair district (southern part of Iraq at Basrah). The model used in the simulation was Visual MODFLOW finite difference approach. All the required landfill and aquifer parameters, stressing and recharge estimates from field and laboratories works, Basrah climate data, observations, soil investigation reports and previous studies for the same region and then used in the model or adjusted by calibration. Six-month observation period was achieved to estimate the monthly state variables data such as heads and physical-chemical leachate and groundwater characteristics by measurement and sampling from the groundwater selected wells. Many soils and water samples were collected to know the aquifer characteristics and analyze the pollutants concentration values. Accordingly, the calibrated model was used to simulate the flow and pollution transport at current year and then used for prediction of future changes in water levels and landfill contaminant transport in the aquifer for planning period of 15 future years. The final simulation and predication results show that the landfill represent main source of contamination and the pollution would occur in the aquifer at high levels and with approximate lateral transporting of 285 m/year if the current state of solid waste disposal continue with increase of pumping from the aquifer from its current rate with future. The groundwater flow and concentration profiles for pollutants with time and spaces from the pollution sources was predicated and a 3-D representation were done for pollutants spreading for specific pollutants.

Experimental and modelling studies on a laboratory scale anaerobic bioreactor treating mechanically biologically treated municipal solid waste.

The performance of an anaerobic bioreactor in treating mechanically biologically treated municipal solid waste was investigated using experimental and modelling techniques. The key parameters measured during the experimental test period included the gas yield, leachate generation and settlement under applied load. Modelling of the anaerobic bioreactor was carried out using the University of Southampton landfill degradation and transport model. The model was used to simulate the actual gas production and settlement. A sensitivity analysis showed that the most influential model parameters are the monod growth rate and moisture. In this case, pH had no effect on the total gas production and waste settlement, and only a small variation in the gas production was observed when the heat transfer coefficient of waste was varied from 20 to 100 kJ/(m d K)-1. The anaerobic bioreactor contained 1.9 kg (dry) of mechanically biologically treated waste producing 10 L of landfill gas over 125 days.

CONJUGATE TREATMENT OF LEACHATE FROM LANDFILL AND SEWAGE IN DOMESTIC STABILIZATION PONDS

In Brazil, the per capita generation of municipal solid waste is approximately 0.80kg.hab-1.day-1, which implies daily production of 156 tons, whereas on average 50% of this quantity of waste is composed mainly of putrescible organic material that will contribute to the leachate generation process directly influencing the qualitative and quantitative aspects. Landfill leachate basically originates from the percolation process of different types of water and is considered a wastewater to cause in significant environmental impact on the environment, given in possession of high concentration of ammonia nitrogen, organic matter difficult to biodegradation, metals heavy and xenobiotics. The objective of this study was to evaluate the performance of a series of stabilization ponds, the treatment process conjugate of landfill leachate fresh more domestic sewage in the proportion of 1 plus 99% (volume percent), respectively. The experimental system consisted of four stabilization ponds in series, being a facultative pond, followed by three maturation ponds. The applied surface charge (λs) the series of stabilization ponds was 320 kgDBO5 . ha-1.day-1 with hydraulic retention time (HRT) of 17 days for the series. The average removal efficiency of BOD5 and ammonia was 69 and 86% respectively, while removing coliform efficiency always in the 99.9% threshold during the monitoring period was 220 days. Overall it can be concluded that treatment conjugate landfill leachate and sewage in stabilization ponds, in northeastern Brazil, is emerging as a promising technological alternative, given the comfortable area availability in northeastern Brazil, conditions climate favorable and the ponds system present low ratio cost / benefit when compared to other waste treatment systems of this nature.

CONJUGATE TREATMENT OF LEACHATE FROM LANDFILL AND SEWAGE IN DOMESTIC STABILIZATION PONDS

In Brazil, the per capita generation of municipal solid waste is approximately 0.80kg.hab-1.day-1, which implies daily production of 156 tons, whereas on average 50% of this quantity of waste is composed mainly of putrescible organic material that will contribute to the leachate generation process directly influencing the qualitative and quantitative aspects. Landfill leachate basically originates from the percolation process of different types of water and is considered a wastewater to cause in significant environmental impact on the environment, given in possession of high concentration of ammonia nitrogen, organic matter difficult to biodegradation, metals heavy and xenobiotics. The objective of this study was to evaluate the performance of a series of stabilization ponds, the treatment process conjugate of landfill leachate fresh more domestic sewage in the proportion of 1 plus 99% (volume percent), respectively. The experimental system consisted of four stabilization ponds in series, being a facultative pond, followed by three maturation ponds. The applied surface charge (λs) the series of stabilization ponds was 320 kgDBO5 . ha-1.day-1 with hydraulic retention time (HRT) of 17 days for the series. The average removal efficiency of BOD5 and ammonia was 69 and 86% respectively, while removing coliform efficiency always in the 99.9% threshold during the monitoring period was 220 days. Overall it can be concluded that treatment conjugate landfill leachate and sewage in stabilization ponds, in northeastern Brazil, is emerging as a promising technological alternative, given the comfortable area availability in northeastern Brazil, conditions climate favorable and the ponds system present low ratio cost / benefit when compared to other waste treatment systems of this nature.

Experimental study on unsaturated hydraulic properties of vegetated soil

Vegetation is often planted on the top of a cover in landfill for ecological restoration and rehabilitation. The vegetation roots, however, may result in preferential flow channels into the underlying waste, and hence increasing leachate generation. The hydraulic properties of the vegetated soil are important factors in assessing the performance of a cover. This study investigates the hydraulic properties of soils with two types of grass (Bermuda grass and Vetiver grass) under unsaturated conditions. The vegetated soils were subjected to seven-month drying-wetting cycles in field. Then the soil samples were retrieved from the site and used to conduct the infiltration tests in laboratory. To minimize disturbance on the soil samples, the sampling and infiltration tests were conducted in the same container. Experimental results showed that the hydraulic conductivity of the soil with Bermuda grass was smaller than that of the bare soil. However, the hydraulic conductivity of the soil with Vetiver grass was significantly larger than that of the bare soil. The results also indicate that the unsaturated hydraulic conductivity of a vegetated soil decreases with depth due to the roots. To reduce rainfall infiltration into the landfill, Bermuda grass with a fibrous root appears to be superior to Vetiver grass with a tap root for the cover.

ADSORPTION STUDIES OF LEACHATE ON COCKLE SHELLS

Sanitary landfills are important means of disposing municipal solid waste in developing countries. However, these landfills are associated with the generation of leachate, which if untreated may pose severe public health risk and may damage the ecosystem in the long term. In this study, cockle shells were explored as an adsorbent media for the treatment of a stabilized landfill leachate. The optimum shaking speed, pH, and dosage for chemical oxygen demand (COD) parameter removal were investigated using the adsorbent media of particle sizes ranging from 2.00 mm to 3.35 mm. Leachate characteristics were then determined. Results indicated that leachate is non-biodegradable with high concentrations of COD (1763 mg/L), ammonia nitrogen (573 mg/L), and biochemical oxygen demand/COD (0.09). The optimum conditions for shaking were determined at 150 rpm according to the adsorption of COD by the media. Optimum pH and dosage was 5.5 and 35 g/L, respectively. The adsorption isotherms indicated that Langmuir isotherm is better fitted than Freundlich isotherm.

Study of Leachate Characterization in Landfill by Municipal Solid Waste

Background and Objectives: It is an expectation that Landfill continues to be the major disposal route for municipal solid waste in future also. It is evident from so many researchers that sanitary land filling is the one of the available cheap and best alternate for handling Municipal solid waste till this day. • Study on generation of leachate in landfills • Determination of composition, characteristics of leachate in landfills. • Determination of concentration and degree of landfill stabilization of leachate. Methods: Leachate is produced during the landfill process. Leachate holding tank in landfill includes drainage, collection, removal with continuous monitoring. It includes treatment methods like: Biological, Physical and Chemical treatment processes. Results: Leachate generation, composition, characteristics, quantity with factors are discussed. Concentration and degree of landfill stabilization are measured. Variations with age in the typical concentrations of common factors for landfill leachate are measured. Typical constituents and characteristics are measured for leachate produced during landfill. Conclusions: Landfill technology is one of the popular methods for municipal solid waste and gaining popularity day by day. It has been implemented in so many countries. Modern landfills sites are well-engineered, operated and monitored. Through the landfills leachate is produced. In order to reduce environmental effects with the produced leachate-composition, quantity, concentration have to be minimize and new techniques are required to reduce green house gas emissions from landfills. Municipal solid waste increasing day by day not only population growth but also due to industrialization also.

CONJUGATE TREATMENT OF LEACHATE FROM LANDFILL AND SEWAGE IN DOMESTIC STABILIZATION PONDS

In Brazil, the per capita generation of municipal solid waste is approximately 0.80kg.hab-1.day-1, which implies daily production of 156 tons, whereas on average 50% of this quantity of waste is composed mainly of putrescible organic material that will contribute to the leachate generation process directly influencing the qualitative and quantitative aspects. Landfill leachate basically originates from the percolation process of different types of water and is considered a wastewater to cause in significant environmental impact on the environment, given in possession of high concentration of ammonia nitrogen, organic matter difficult to biodegradation, metals heavy and xenobiotics. The objective of this study was to evaluate the performance of a series of stabilization ponds, the treatment process conjugate of landfill leachate fresh more domestic sewage in the proportion of 1 plus 99% (volume percent), respectively. The experimental system consisted of four stabilization ponds in series, being a facultative pond, followed by three maturation ponds. The applied surface charge (λs) the series of stabilization ponds was 320 kgDBO5 . ha-1.day-1 with hydraulic retention time (HRT) of 17 days for the series. The average removal efficiency of BOD5 and ammonia was 69 and 86% respectively, while removing coliform efficiency always in the 99.9% threshold during the monitoring period was 220 days. Overall it can be concluded that treatment conjugate landfill leachate and sewage in stabilization ponds, in northeastern Brazil, is emerging as a promising technological alternative, given the comfortable area availability in northeastern Brazil, conditions climate favorable and the ponds system present low ratio cost / benefit when compared to other waste treatment systems of this nature.