Statistical Evaluation of Landfill Leachate System and its Impact on Groundwater and Surface Water in Malaysia

Abstract

In this study, leachate collection and processing system in Ampar Tenang Closed Landfill (ATCL) and its impact on both groundwater and surface water was evaluated. Samples from three locations in leachate processing system (Collection, aeration and stabilization ponds), groundwater and surface water were collected and tested for twenty-one parameters covering nine heavy metals (Fe Correlation analysis for landfill leachate ponds, groundwater and surface water showed different patterns of relationships between all possible combinations of two parameters. Similarity and dissimilarity were studied through cluster analysis, three clusters were found to entirely separate the collection pond (cluster 1) while the two ponds were clustered with groundwater samples (cluster 2) and the third cluster is for the surface water. This study shows the benefit of statistical analysis such as correlation analysis and cluster analysis for evaluation and interpretation of landfill data to understand the behavior of the selected parameters and to have a clear picture about the pattern of the relationship for effective landfill management. ABSTRAKDalam kajian ini, sistem pengumpulan dan pemprosesan air larut resap di Tapak Pelupusan Tertutup Ampar Tenang (ATCL) dan kesannya terhadap air bawah tanah dan air permukaan telah dinilai. Sampel daripada tiga lokasi dalam sistem pemprosesan air larut resap (kolam pengumpulan, pengudaraan dan penstabilan), air bawah tanah dan air permukaan diperoleh dan diuji untuk dua puluh satu parameter iaitu sembilan jenis logam berat (Fe dan oksigen terlarut (DO)). Analisis korelasi untuk kolam air larut resap, air bawah tanah dan air permukaan menunjukkan corak hubungan yang berbeza antara semua kemungkinan gabungan dua parameter. Persamaan dan ketidaksetaraan dikaji melalui analisis kelompok dan tiga kelompok didapati memisahkan kolam pungutan sepenuhnya (kelompok 1) manakala dua kolam berkumpul dengan sampel air bawah tanah (kelompok 2) dan kelompokketiga adalah untuk air permukaan. Analisis statistik seperti analisis korelasi dan analisis kelompok untuk penilaian dan pentafsiran data tapak pelupusan sampah dapat membantu dalam memahami ciri-ciri parameter terpilih dan untuk mendapatkan gambaran yang jelas mengenai corak perhubungan bagi pengurusan tapak pelupusan sampah yang berkesan.Kata kunci: Air larut resap; analisis kelompok; logam berat; matriks korelasi; statistik diskriptif; tapak pelupusan sampah

Phytoremediation of TSS, NH3-N and COD from Sewage Wastewater by Lemna minor L., Salvinia minima, Ipomea aquatica and Centella asiatica

“…It was indicated that each plant that acts as phytoremediation agent has its own efficiency rate in removing different pollutants. However, there are several factors that may affect the reduction percentage of contaminants, such as the type of pollutant and wastewater, treatment duration and pollutant concentration [52][53][54].…”

Phytoremediation of landfill leachate using Ipomoea aquatica and Pistia stratiotes

“…According to the previous study conducted in Ampar Tenang Landfill site, high concentrations of heavy metals are hazardous for human health and the landfill site can cause a serious groundwater pollution within its proximity (Yusoff et al, 2013). Based on the previous study of Banch et al, (2019b), natural coagulant from palm oil mill effluent are able to reduce heavy metals in the leachate samples. concentration of COD from 50 mg l to 40 mg l over a period of 14 days (Zimmels et al, 2006).…”

“…The main problems associated with waste disposal sites are the production of leachate and release of harmful CH gas (Banch et al, 2020b). 4 The release of leachate from landfill in the environment is a concern due to toxic nature of leachate that can have deterioration effects on human health (Banch et al, 2019b). In addition, heavy metals present in leachate are highly toxic when their concentration exceeds the permissible limit set by the regulatory bodies limit (Shaikh et al, 2019).…”

Potential application of landfill leachate as the substrate for electricity generation.

“…Estimates place the amount of leachate produced by Malaysia's landfills at around 3 million litres per day; however, other countries with rainfall levels comparable to Malaysia's frequently create considerably more leachate. [4]. Leachate composition depends mostly on the content making up the landfill but is mostly presented with dissolved organic-inorganic macro-components which includes high range of biochemical oxygen demand from 4000mg/L-13000 mg/L (BOD), chemical oxygen demand of 30000mg/L -60000 mg/L (COD) along with organic waste, and other toxicants like heavy metals and ammoniacal-nitrogen [5] [6].…”