IJSRSET152232 | Received: 8 March 2015 | Accepted: 12 March 2015 | March-April 2015 [(1)2: 104-106] Themed Section: Engineering and Technology 104 Modeling of Biological Wastewater Treatment Facilities: A Review Sunil J. Kulkarni *1 , Sonali R. Dhokpande 2 , Dr. Jayant P. Kaware 3 *1,2 Chemical Engineering Department, Datta Meghe College of Engineering, Airoli, Navi Mumbai, Maharashtra, India 3 Bhonsala College of Engineering and Research, Akola, Maharashtra, India ABSTRACT Wastewater treatment is major research area in the modern era of industrialization and growing awareness about the sustainable growth. The biological treatment facilities are used in treatment plants for domestic and industrial waste water. Various biological treatments include suspended growth processes like activated sludge process and attached growth techniques like trickling filters. The modeling of these treatment facilities is important. It can be used to relate experimental data for developing the pilot and actual plant. By using the modeling technique, important parameter values can be related for experimental data and can be scaled up. The present review summarizes the modeling for biological treatment facilities. Keywords: Effluent, parameters, suspended growth, attached growth. I. INTRODUCTION Wastewater treatment for removal of various metals, organic matters and other contaminants includes physical, chemical and biological treatment techniques [1, 2, 3]. Adsorption and ion exchange are very important treatment methods. Methods like membrane separation, electro coagulation and flocculation can be used effectively for water treatment for removal of various pollutants [4,5,6]. Biological treatments of wastewater for removal of organic matter are widely studied treatment techniques. Biological wastewater treatments for removal of heavy metals have been reported[7,8,9,10,11]. Modeling of the treatment plants is very important aspect of the treatment methods. The present review aims at summarizing the research on modeling of biological treatment facilities. II. RESEARCH ON MODELING OF BIOLOGICAL TREATMENT FACILITIES Carsky and Mbhele carried out kinetic modeling of copper biosorption using marine algae [12].Contact time of 3 hours was enough for equilibrium. According to them copper biosorption was function many parameters like type of biomass (number and kind of biosorption sites), size and form of biomass, physiological state of biomass (active or inactive, free or immobilized), as well as the metal involved in the biosorption system. According to their kinetic modeling, biosorption was divided into two stages: one in which the sorption rate is very high (60% of biomass saturation capacity in a contact time of 25 minutes), followed by a second stage with a much lower sorption rate. Hasan et.al reviewed the design criteria for the design criteria of biological aerated filter (BAF) for COD, ammonia and manganese removal in drinking water treatment [13].They plotted two correlations 1. COD removal efficiencies against the H/D ratio and 2. H/D ratio against BAF height. They observed the expected removal efficiency of COD and ammonia. It was within 80-90%. Masic carried out investigation on a biofilm reactor model with suspended biomass [14]. He presented a one dimensional mathematical model of biofilm and suspended biomass in a continuous stirred tank reactor. The model they referred to was hybrid of chemo-stat like mass balances for the substrate and biomass in the reactor. It was coupled with a free boundary value problem for the substrate in the biofilm. According to the numerical simulations, biofilm dominated over suspended biomass in the long-term reactor performance. He extended this model to two-step nitrification in a moving bed biofilm reactor (MBBR). Eftaxias carried out research on © 2015 IJSRSET | Volume 1 | Issue 2 | Print ISSN : 2395-1990 | Online ISSN : 2394-4099