Journal article
A Procedure to estimate proximate analysis of mixed organic wastes
Water environment research, Vol.81(4), pp.407-415
2009
Handle:
https://hdl.handle.net/2376/113632
PMID: 19445330
Abstract
In waste materials, proximate analysis measuring the total concentration of carbohydrate, protein, and lipid contents from solid wastes is challenging, as a result of the heterogeneous and solid nature of wastes. This paper presents a new procedure that was developed to estimate such complex chemical composition of the waste using conventional practical measurements, such as chemical oxygen demand (COD) and total organic carbon. The procedure is based on mass balance of macronutrient elements (carbon, hydrogen, nitrogen, oxygen, and phosphorus [CHNOP]) (i.e., elemental continuity), in addition to the balance of COD and charge intensity that are applied in mathematical modeling of biological processes. Knowing the composition of such a complex substrate is crucial to study solid waste anaerobic degradation. The procedure was formulated to generate the detailed input required for the International Water Association (London, United Kingdom) Anaerobic Digestion Model number 1 (IWA-ADM1). The complex particulate composition estimated by the procedure was validated with several types of food wastes and animal manures. To make proximate analysis feasible for validation, the wastes were classified into 19 types to allow accurate extraction and proximate analysis. The estimated carbohydrates, proteins, lipids, and inerts concentrations were highly correlated to the proximate analysis; correlation coefficients were 0.94, 0.88, 0.99, and 0.96, respectively. For most of the wastes, carbohydrate was the highest fraction and was estimated accurately by the procedure over an extended range with high linearity. For wastes that are rich in protein and fiber, the procedure was even more consistent compared with the proximate analysis. The new procedure can be used for waste characterization in solid waste treatment design and optimization.
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Details
- Title
- A Procedure to estimate proximate analysis of mixed organic wastes
- Creators
- Usama Zaher - Department of Biological Systems EngineeringPierre Buffiere - Laboratoire de Génie Civil et d'Ingénierie EnvironnementaleJean-Philippe Steyer - Laboratoire de Biotechnologie de l'Environnement [Narbonne]Shulin Chen - Department of Biological Systems Engineering
- Publication Details
- Water environment research, Vol.81(4), pp.407-415
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Water Environment Federation
- Identifiers
- 99900547682201842
- Language
- English
- Resource Type
- Journal article