Optimum Design of Waste Water Treatment Network

Abstract

Abstract:Various environmental regulations imply that it is important to minimize the cost associated with treatment of different industrial wastes prior to its discharge to the environment. In this paper an algebraic methodology, based on the principles of process integration, is proposed to target the minimum waste treatment flow rate to satisfy environmentally acceptable discharge limit. In the proposed methodology treatment units with fixed outlet concentrations are considered. It is observed that it is not necessary to maximize the usage of the treatment unit with the minimum specific cost. Hence, a prioritized cost for each treatment unit is devised to select appropriate treatment units that minimize the overall operating cost. Applicability of the proposed methodology is demonstrated through examples.

Simultaneous Synthesis of Single and Multiple Contaminants Water Networks Using LINGO and Excel Software

“…Graphical based techniques are also considered in several studies to improve the distribution of water and wastewater in the design of water networks; Irene et al [14] used a graphical technique to minimize the waste flowrates and fresh resources in the design of an inter-plant resource conservation network. Sahu et al [15] introduced a graphical method with adding a treatment unit to minimize the concentrations of contaminants and maximize the reuse of wastewater with minimizing the cost of treatment. Another graphical technique was proposed by Farrag et al [16] for the analysis and design of wastewater network using the composition driving forces; they studied the effect of the mass load of contaminants on the maximum mass recovery.…”

Designing Water Inter-Plant Networks of Single and Multiple Contaminants through Mathematical Programming

“…An adaptive random search (ARS), which is an optimization approach introduced by Poplewski et al, is applied to several case studies of mixed integer nonlinear problems: a case study of a paper mill was presented with several processes which included pulping (dilution), a paper machine, a cylinder shower and felt showers [11]. An organic production plant was presented by Gopal et al, using treatment units to minimize the concentrations of contaminants and maximize the reuse of wastewater while minimizing the cost of treatment [12]. Yang et al have proposed mathematical programming approaches that are based on mixed integer nonlinear programming to optimize reuse-recycle wastewater networks using treatment units; several methods, such as reverse osmosis, ion exchange, sedimentation, ultrafiltration and activated sludge, were used to decrease the concentration of contaminants [13].…”

Catalytic mechanism study on manganese oxide in the catalytic supercritical water oxidation of nitrobenzene

“…Wastewater treatment has become a signicant issue for chemical processes on account of the natural laws and rules for maintaining a clean environment. 1 As an important chemical raw material as well as a product of industry, nitrobenzene has been widely used in the manufacture of dyes, plastics, pesticides, explosives, pharmaceuticals and lubricating oil. 2 Nitrobenzene is usually found in wastewater and has been listed as a priority pollutant due to the mutagenesis and carcinogenesis of the compound.…”