Micro-Peat as a Potential Low-Cost Adsorbent Material for COD and NH₃-N Removal

Abstract

Micro-peat (M-P) was demonstrated in the present study as a potential low cost natural adsorbent for the removal of COD and ammoniacal nitrogen (NH3-N) from landfill leachate. A series of batch experiments were carried out under fixed conditions and the influence of mixture ratio was investigated. The characteristics of leachate were then determined. Results indicated that leachate is non-biodegradable with high concentration of COD (2739.06 mg/L), NH3-N (1765.34 mg/L) and BOD5/COD ratio (0.09). The optimum ratio for activated carbon (AC) and M-P in the removal of COD and NH3-N obtained were at 2.5:1.5 (87%) and 1.0:3.0 (65%) respectively. The low-cost natural adsorbent used in the present investigation is an attractive alternative to the conventional adsorbent (AC). Thus, M-P can be appropriated for use in leachate treatment that could be cost-effective due its local availability and adsorption property.

Equilibrium isotherm and kinetic study of the adsorption of organic pollutants of leachate by using micro peat-activated carbon composite media

“…Initial investigation revealed that the leachate has high concentration of color, COD, and ammoniacal nitrogen (NH 3 -N), with lower value of BOD 5 :COD ratio (<0.1). Hence, Simpang Renggam landfill can be categorized as stabilized landfill leachate [4,25]. Stabilized landfill leachate is known to contain refractory organic compound [3,23].…”

“…This is believed to occur due to the removal efficiency of COD. The removal of color was observed to decrease with further increment of AC which attained the maximum removal rate of both parameters and therefore the increase of available sorption sites may result in aggregation which can decrease the probability of molecules contacting all available adsorption sites [4,25].…”

“…Additionally, the composition of leachate is highly site specific and varies widely depending on many factors such as the waste composition, site hydrology, the availability of moisture and oxygen, design and operation of the landfill, and its age [2]. Furthermore, it is also reported that the organic matter present in the leachate or other wastewater act as major contaminants as it has tendency to pollute water bodies and surrounding land [3,4]. In addition, wastewater with organic contaminants contain large quantities of suspended solid that may generate hydrogen which contributes majorly to greenhouse emission of gasses [5,6].…”

Ammoniacal Nitrogen Removal Using flamboyant pods (Delonix Regia) Adsorbent for Natural Rubber Wastewater Treatment

“…Advanced oxidation approach are economically expensive and can have problems of chlorine oxidation. Other types of treatments such as ozonation [1][2][3], coagulationflocculation [4] also have been used in investigations but have economic cost. Generally, many methods have been applied for the treatment of wastewater and adsorption remained the most preferred because of the ease in operation as well as its global application.…”

Optimization of Batch Conditions for COD and Ammonia Nitrogen Removal Using cockle shells Through Response Surface Methodology

“…Agricultural waste biomass is currently a topic of interest that has been receiving considerable attention in the past few decades [12]. In recent years, different native and low-cost materials, such as peat soil, feldspar, cockle shell (CS), seaweed, rice husk, wood sawdust, banana frond, and limestone, have been considered successful alternatives for wastewater treatment [13]. Several operational parameters, such as pH, dosage, and shaking speed, mainly influence the minimization of chemical oxygen demand (COD) and ammonia nitrogen (NH 3 -N).…”