The effectiveness of oil palm trunk waste derived coagulant for landfill leachate treatment

Abstract

Abstract. Coagulation-flocculation has been extensively applied for semi-aerobic landfill leachate treatment, prior to other treatment methods. Opting for alternative other than conventional aluminium-based coagulants, mechanically treated starch from oil palm trunk waste had been tested as coagulant for semi-aerobic landfill leachate treatment. FTIR and corresponding elemental analysis had revealed its dominant functional groups like hydroxyl, carboxyl and amine, insinuating existences of starch, fatty acids, proteins, phosphonates, ash and small traces of lignin. Jar test using partially stabilised semi-aerobic landfill leachate from Pulau Burung Landfill Site had shown that this particular botanical coagulant could remove suspended solids and COD in semi-aerobic landfill leachate, though the efficiencies were relatively much lower compared to those of polyaluminium chloride (PAC). Apparently, it was more suitable to be applied as coagulant aid in tandem with PAC, augmenting PAC coagulation performance with 12-16% of improvement. The findings of this first ever attempt had unravelled the potential of oil palm trunk waste in semiaerobic leachate treatment

Characteristics of the leachate produced during nutrient recycling of food and poultry slaughter wastes by fly larvae

“…Wang et al (2013) reported a COD of 6200 for raw landfill leachate. In the current study, the COD of BW-I was more than that reported by Zamri et al (2016) but less than that mentioned by Wang et al (2013); values were however within the range reported by Kylefors (1997). In studies by Cruz (2020), the high COD of leachate was attributed to the accumulation of carboxylic acid intermediates.…”

“…But the value reported by Chavez et al (2005) was 6.6 which was lower than that obtained in the present study. The lowest pH of BW-II leachate was 3.30 ± 0.12 and it ranged between 3.3 and 4.65, which was lower than that reported byWang et al (2013) andZamri et al (2016) for landfill leachate for which the pH was 8-8.1. But the value was closer to that reported bySall et al (2019) in studies on vegetable and fruit compost leachate (5.4).…”

“…Kylefors, (1997) reported that COD of the landfill leachate ranged between 668 and 35000. According to Zamri et al (2016), the COD for stabilised MSW leachate was 3127mg/l. Wang et al (2013) reported a COD of 6200 for raw landfill leachate.…”

Removal of leachate pollutants using flocculation method at simultaneous factors of optimum pH and Tacca leontopetaloides biopolymer flocculant (TBPF) dosage via face‐centred central composite design

“…The discharge of these pollutants into the water stream without proper treatment has been a major concern, especially for underground water, which might be used for consumption. Currently, the conventional method adsorption through the coagulation–flocculation process is still used for treating leachate (Ghafari et al, 2010; Zamri et al, 2016). Chemical coagulants such as polyacrylamide and poly‐aluminum chloride were used as coagulants/flocculants to enhance the coagulation/flocculation process (Chen et al, 2020).…”

High Turbidity and Cod Removal in River Water Using Low Dosage Plant-Based Tacca Leontopetaloides Flocculant (Tbpf) Followed by Activated Carbon Treatment

“…As a result, physical-chemical treatment has been proposed and practiced for a lengthy period of time. The coagulation-flocculation technique is the most successful method of treating wastewater utilizing physical-chemical treatment [5]. In coagulation, a chemical coagulant is added to enhance the agglomeration of colloid particles in the suspension water to form larger flocs and end up settling gravitationally [6].…”