Removal of COD, ammoniacal nitrogen and colour from stabilized landfill leachate by anaerobic organism

Abstract

This study was conducted to investigate the treatment performance of anaerobic organism for stabilized leachate under ambient air condition. The treatability of landfill leachate was tested under various influences including pH, dosage of anaerobic organism and contact time. Laboratory experiment revealed that anaerobic organism was in progressive state when the leachate in neutral condition. At this phase, the removal efficiency of chemical oxygen demand (COD), ammoniacal nitrogen (NH 3-N) and colour of 76.84, 59.44 and 46.2 %, were experimentally attained. The experimental results also showed that the the optimum variables condition was established at pH 7 of leachate sample, dosage of 100 mL of anaerobic organism and required 14 days to reduce the COD, NH 3-N and colour pollutants to 65.5, 60.2 and 46.3 %, respectively. The preliminary investigation shows that the anaerobic organisms were able to remediate leachate pollutants by the microbial activity in the leachate sample under ambient air condition.

Efficiency of Five Selected Aquatic Plants in Phytoremediation of Aquaculture Wastewater

“…An independent t-test analysis showed no significant value (p < 0.05) between the phosphate reductions by all five species after 14 days, except for E. crassipes and I. aquatica, since the highest average removal value was 0.34 mg/L by E. crassipes, with I. aquatica being the lowest-0.17 mg/L. The efficient reduction of phosphate from the wastewater comes from plant uptake and the presence of diverse substrates [42]. This pollutant is the major constituent in adenosine diphosphate (ADP) and adenosine triphosphate (ATP), which acts as a building block for nucleic acids, sugar phosphates, nucleotides, and many more, especially during the active growth of plants.…”

“…This pollutant is the major constituent in adenosine diphosphate (ADP) and adenosine triphosphate (ATP), which acts as a building block for nucleic acids, sugar phosphates, nucleotides, and many more, especially during the active growth of plants. Phosphates are crucial for energy storage and transfer in photosynthesis and respiration, essential for normal growth, maturity, and root system development, but too much phosphate in a plant's system may be lethal [40][41][42][43]. In addition, some macrophytes need phosphate more than other macrophytes, depending on the plants' type, requirements and its surrounding environment.…”

Removal of organic and inorganic compounds from landfill leachate using reverse osmosis

“…Sanitary landfilling is preferred over other waste management strategies such as incineration and composting owing to its economic advantages and minimum technology being practiced (Kamaruddin et al 2013;Ahmed and Lan 2012). One of the main environmental problems arising from solid waste landfilling is generation of landfill leachate.…”

“…They are the result of undergoing physicochemical and biological changes in landfill body, percolation of rainwater through the wastes and inherent moisture content in the waste (Theepharaksapan et al 2011;Ahmed and Lan 2012). Landfill leachate is a complex mixture of inorganic and organic substances, which can be categorized into four groups: dissolved organic matter, inorganic macrocompounds, heavy metals and xenobiotic organic compounds (Ahmed and Lan 2012;Jemec et al 2012;Kamaruddin et al 2013). Organic content of leachate pollution is generally measured by chemical oxygen demand (COD) and biochemical oxygen demand (BOD).…”

Mapping Water Quality Parameters in Urban Rivers from Hyperspectral Images Using a New Self-Adapting Selection of Multiple Artificial Neural Networks

“…A previous study by the local government showed that a large quantity of algae need oxygen to grow and release oxygen, resulting in a high concentration of each water quality parameter [7,32] in Figure 9b,c, indicating that the concentration of each water quality parameter from the bank is high represented by the orange band and caused by cultivation industry near the bank, and a small concentration is observed everywhere else [64]. As shown in Figure 6b,c, COD and BOD have a similar distribution of concentration near the discharge outlet close to the bank because of the need for some cultivated aquatic plants or animals, and a low concentration of COD and BOD from the bank toward the center of the river is observed, forming a curvy band of relatively dense concentration along the convex parts of the bank [36].…”