Landfill Leachate Used as Irrigation Water on Landfill Sites During Dry Seasons

As one of the important odour sources, landfill sites have drawn more and more public attentions. Odour emissions from landfill sites depend on the waste buried, operation activities, running conditions, etc. A study for finding out all possible odorous compounds from a landfill was conducted by analysing of on-site gas phase samples and emission samples from a landfill leachate in Sydney, Australia using thermal desorber – gas chromatography – mass spectrometer (TD-GC-MS) and air server – thermal desorber – gas chromatography – sulfur chemiluminoscence detector (AS-TD-GC-SCD). 49 odorants were identified from emission gas samples collected from landfill leachate collection pipe and only 8 odorants were detected from flux hood emission samples of the collected leachate sample. This indicates that more sampling and measurement techniques are always better to acquire all possible pollutants from an unknown odour source. The contributions of these odorants to overall odour emissions were also calculated based on their concentrations and odour thresholds. The top 10 odorants from leachate transportation pipe include methyl mercaptan, ethyl mercaptan, m-xylene, H2S, CS2, 1,2,3,4-tetra-methylbenzene, p-xylene, 1,2,4-trimethylbenzene, ethylbenzene and α-pinene. They contributed more than 95% to the odour in the gas accumulated in the leachate collection pipe.

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Blast furnace slag and pine bark as potential filter media for metal sorption from landfill leachate

Linnaeus Eco-Tech ◽

10.15626/eco-tech.2005.033 ◽

2019 ◽

pp. 325-333

Author(s):

Lena Johansson Westholm

Keyword(s):

Heavy Metals ◽

Blast Furnace ◽

Landfill Leachate ◽

Blast Furnace Slag ◽

Laboratory Experiments ◽

Pine Bark ◽

Treatment Methods ◽

Filter Materials ◽

Landfill Sites ◽

Furnace Slag

Heavy metals are commonly occurring in landfill leachate and in order to achieve theenvironmental goal about a non-toxic environment adopted by the Swedish Parliament, theleachate must be treated before being discharged into a nearby surface or groundwater body.There are several technical treatment options based on chemical, biological or physicalprocesses. Examples of these techniques are the SBR technique, oxidation and membranefiltration. These treatment methods are not always suitable at all landfill sites due toeconomical and/or technical constraints. Other treatment methods have therefore attractedattention. These methods, often natural based such as constructed wetland systems, are moreadapted to small landfill sites where high-tech and cost-demanding alternatives are not anoption. One natural based method that has attracted attention for leachate treatment in recentyears is the filter technique. It is based on the passage of a polluted water flow through a filtermedia with properties suitable for retention of heavy metals or other pollutants. A largenumber of different filter materials have been investigated with regard to their metal sorptioncapacity. The majority of these studies have been carried out in laboratory experiments ofdifferent kinds. Industrial by-products such as blast furnace slag and pine bark are filtermaterials that have been considered interesting for metal removal from landfill leachate. Aseries of laboratory experiments carried out as batch tests have therefore been conducted inorder to learn more about the potential of these filter materials to remove heavy metals fromlandfill leachate.

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Hydrochemical evaluation of river Ajali water for irrigational application in agricultural farmland

Applied Water Science ◽

10.1007/s13201-021-01395-4 ◽

2021 ◽

Vol 11 (4) ◽

Author(s):

Hillary Onyeka Abugu ◽

Pamela Favour Egwuonwu ◽

Janefrances Ngozi Ihedioha ◽

Nwachukwu Romanus Ekere

Keyword(s):

Drinking Water ◽

River Water ◽

Irrigation Water ◽

Water Samples ◽

Standard Methods ◽

Major Cation ◽

Dry Seasons ◽

Enugu State ◽

Peasant Farmers ◽

Average Contribution

AbstractA major population of Udi and Ezeagu communities residing along river Ajali is peasant farmers who engage in the cultivation of vegetables along the river banks during the dry seasons. The existence of beverage industries around the 9th Mile Corner Ngwo of Enugu State has caused both communities to suffer from a shortage of quality drinking water, due to the constant discharge of wastewater by these industries into the Ajali River, which flows through these communities. Ajali River water near some beverage industries was then assessed for irrigation application. Water samples were collected from different locations along the river. Physicochemical and ionic parameters were analyzed using standard methods. Irrigation water criteria were applied, and the result showed that the major cation and anions were Mg2+, Ca2+, Na+, K+ and HCO3−, SO42−, $${\text{PO}}_{4}^{3- }$$ PO 4 3 - , NO3−, Cl−, CO3− . Na+ was dominant with 43% average contribution of all the cations, while the least was Mg2+ with 4% average contribution; HCO3− was the dominant anion with 31% contribution while $${\text{PO}}_{4}^{3- }$$ PO 4 3 - was the least with 2% average contribution. The trend of the cations was Na+ > K+ > Ca2+ > Mg2+ while the anions were HCO3− > SO42− > Cl− > NO3− > CO3− > PO43−. The cation concentrations were within FAO irrigation water specifications. However, some samples recorded higher values of carbonate above FAO limit (0–3 mg/L). All the irrigation assessment criteria suggested that Ajali River water is suitable for irrigation purposes.

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The stability of dolomite in landfill leachate-collection systems

Canadian Geotechnical Journal ◽

10.1139/t99-110 ◽

2000 ◽

Vol 37 (2) ◽

pp. 371-378 ◽

Cited By ~ 14

Author(s):

Peter J Bennett ◽

Frederick J Longstaffe ◽

R Kerry Rowe

Keyword(s):

Thermodynamic Stability ◽

Landfill Leachate ◽

Pore Space ◽

Collection System ◽

Southern Ontario ◽

Leachate Collection ◽

The United Kingdom ◽

Landfill Sites ◽

The Stability ◽

Simulated Landfill

This study uses several approaches to examine whether calcium-containing aggregate such as dolostone is a suitable drainage material for landfill leachate-collection systems. The thermodynamic stability of carbonate drainage materials has been assessed using published leachate data from landfills in the United Kingdom and leachate sampled from four large landfill sites of variable age in southern Ontario. Electron-microbeam techniques have been used to check for dissolution in dolomitic stone exhumed from the drainage layer of the Keele Valley Landfill leachate-collection system and from experiments that simulated landfill conditions. The mineralogy of cover soils applied daily to the landfill has been compared to the drainage stone and detrital material occluding pore space in the leachate-collection system to evaluate their relative contributions to clogging. The data suggest that dissolution of dolomitic drainage stone is not significant and contributes little to the clogging of landfill leachate-collection systems. However, crystallization of secondary calcite occurs about the dolomitic stones and sizeable quantities of inorganic fines, including dolomite, were present within some samples of "clog material" exhumed from the Keele Valley collection system. Most of the dolomitic fines probably were generated during construction of the collection system; such creation of fines ought to be minimized in future landfill developments.Key words: leachate-collection system, landfills, clogging, mineralogy, leachate chemistry.

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A Comparative Study of Matang and Kuala Sembeling Landfills Leachate Characteristics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.361-363.776 ◽

2013 ◽

Vol 361-363 ◽

pp. 776-781 ◽

Cited By ~ 1

Author(s):

Nur Shaylinda Mohd Zin ◽

Hamidi Abdul Aziz ◽

Mohd Nordin Adlan ◽

Azlan Ariffin ◽

Mohd Suffian Yusoff ◽

...

Keyword(s):

Comparative Study ◽

Landfill Leachate ◽

Permissible Limit ◽

Grab Sampling ◽

Leachate Characteristics ◽

Landfill Sites ◽

Suitable Treatment

Understanding the characteristic of leachate is important since it has complexity properties because of the variation in its composition. This study, analyzed and compared two leachate from two landfill sites, namely, Matang and Kuala Sembeling landfill. Leachate raw samples were collected by grab sampling and were analyzed for 11 parameters. The average concentrations of MLS and KSLS leachate such as BOD5 (146 and 61 mg/L), COD (828 and 363 mg/L), pH (7.6 and 8), SS (407 and 220 mg/L), ammonia (868 and 367 mg/L) , BOD/COD (0.18 and 0.14), cadmium (0.19 and 0.1 mg/L), cuprum (0.09 and 0.1 mg/L), nickel (0.17 and 0.1 mg/L), manganese (0.09 and 0.22 mg/L), and ferum (2.3 and 8.3 mg/L) were recorded, respectively. The results revealed that the both landfills are categorized as partially stabilized leachate. The strength of leachate pollutants from MLS are higher than KSLS because of the higher fraction of organics concentration. There are 5 parameters (BOD5, COD, ammonia, SS and cadmium) in MLS and 7 parameters (BOD5, COD, ammonia, SS, cadmium, manganese and ferum) in KSLS exceeded the permissible limit stated by MEQA (1974), and so leachates from both landfill sites need a suitable treatment to reduce the concentration of the leachate pollutants before discharge into environment.

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Landfill leachate as irrigation water for tree and vegetable crops

Waste Management & Research ◽

10.1016/0734-242x(89)90069-4 ◽

1989 ◽

Vol 7 (4) ◽

pp. 311-323 ◽

Cited By ~ 1

Author(s):

M WONG ◽

C LEUNG

Keyword(s):

Landfill Leachate ◽

Irrigation Water ◽

Vegetable Crops

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To the issue of water treatment by hydrocyclone on the systems of the combined irrigation

Melioration and Water Management ◽

10.32962/0235-2524-2019-2-21-25 ◽

2020 ◽

Vol 0 (2) ◽

pp. 21-25

Author(s):

Nikolay Dubenok ◽

Andrey Novikov ◽

Sergei Borodychev ◽

Maria Lamskova

Keyword(s):

Water Treatment ◽

Organic Compounds ◽

Irrigation Water ◽

Irrigation System ◽

Petroleum Products ◽

Cylindrical Part ◽

Agricultural Landscapes ◽

Treatment Unit ◽

Drain Pipe ◽

Irrigation Network

At the stage of water treatment for irrigation systems, the efficiency capture coarse and fine mechanical impurities, as well as oil products and organic compounds affects the reliability of the equipment of the irrigation network and the safety of energy exchange processes in irrigated agricultural landscapes. The violation of work irrigation system can cause disruptions in irrigation schedules of agricultural crops, crop shortages, degradation phenomena on the soil and ecological tension. For the combined irrigation system, a water treatment unit has been developed, representing a hydrocyclone apparatus with a pipe filter in the case. For the capacity of 250 m3/h the main geometrical dimensions of hydrocyclone have been calculated. To organize the capture petroleum products and organic compounds, it has been proposed a modernization of a hydrocyclone unit, consisting in dividing the cylindrical part of the apparatus into two section. The first is section is for input irrigation water, the second one is for additional drainage of clarified irrigation water after sorption purification by the filter, placed on the disk and installed coaxially with the drain pipe and the pipe filter.

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