Definition   Simply a well – mixed vessel with fluctuating input flow rates and / or concentration with fairly constant output flow rates and/or concentrations. Processes for waste treatment work best with uniform conditions. Shocks to the bioprocesses in the form of sudden changes in concentrations of nutrients can cause upsets. If the concentrations or …

The theory of luxury uptake of phosphorus is now well developed (Wentzel et al. 1990; Wentzel et al. 1991). It has been shown that exposing the mixed liquor to an anaerobic/aerobic sequence in the biological reactor selects microorganisms that accumulate higher levels of intracellular phosphorus than other microorganisms. Phosphorus-removing microorganisms are able to rapidly assimilate …

Introduction Wastewaters obtained from industries are generally much more polluted than the domestic or even commercial wastewaters. Still, however, several industrialists try to discharge their effluents into natural river streams, through unauthorized direct discharges. Such a tendency, on the part of industries may pollute the entire river water to a grave extent, thereby making its …

Preliminary treatment consists of a series of steps which prepare industrial wastewaters for the actual treatment processes that follow it. Typically, preliminary treatment includes equalization, screening and, if necessary, pH adjustment. In certain industries, oil and grease removal may also be necessary Equalization The influent to an industrial wastewater treatment system (IWTS) varies in flow …

267000 m3/d   PROJECT OVERVIEW The wastewater management system for the Greater Amman area includes the collection, conveyance and treatment of the wastewater generated in the Amman Russeifa — Zarqa basin, where 60% of the population of Jordan lives Samra wastewater treatment plant project is  a public private partnership (ppp) for financing the construction and …

Desalination and Water Purification Research and Development , Report No. 103 U.S. Department of the Interior Bureau of Reclamation Technical Service Center Denver, Colorado   Wastewater reclamation is gaining popularity worldwide as a means of conserving natural resources used for drinking water supply. The use of membrane bioreactor (MBR) technology, which combines conventional activated sludge …

Technical University of Civil Engineering of Bucharest (UTCB) Sanitary Engineering and Water Protection Department By: Eng. ABDULRZZAK ALTURKMANI Advisor: Prof. Dr. Eng. ALEXANDRU MANESCU Bucharest-2007  Abstract Many industries produce waste streams that must be treated prior to discharge into the environment. Technologies of industrial wastewater treatment have evolved significantly in response to government regulation of …

The wastewater from industries varies so greatly in both flow and pollutional strength. So, it is impossible to assign fixed values to their constituents. In general, industrial wastewaters may contain suspended, colloidal and dissolved (mineral and organic) solids. In addition, they may be either excessively acid or alkaline and may contain high or low concentrations …

Description The sequencing batch reactor (SBR) process is a sequential suspended growth (activated sludge) process in which all major steps occur in the same tank in sequential order (Figure 1). There are two major classifications of SBRs: the intermittent flow (IF) or “true batch reactor,” which employs all the steps in figure 1, and the …

The influent to an industrial wastewater treatment system (IWTS) varies in flow and concentration of pollutants because the discharges from the manufacturing and utility processes are not constant. This variation affects the operation of the IWTS and could adversely affect the effluent quality from the plant. The objective of equalization is to minimize or control …

The primary function of an oil-water separator, such as the American Petroleum Institute (API) Separator, is to separate free oil globules larger than 0.015 cm (150 microns) from wastewaters. Such gravity separators will not separate oil droplets smaller than the size of free oil nor will it break down emulsions. Fig.1 shows the classification and …

Some of the effects of industrial wastewater discharges on collection and treatment systems were discussed briefly before. This section will describe in more details how industrial wastewaters can affect the operation and performance of both the IWTS and the POTW, and how direct discharges to the environment could affect receiving waters. If an industrial wastestream …

In most industries, wastewater effluents result from the following water uses:   • Sanitary wastewater (from washing, drinking, etc.); • Cooling (from disposing of excess heat to the environment); • Process wastewater (including both water used for making and washing products and for removal and transport of waste and by-products); and • Cleaning (including wastewater …

The wastewater from industries varies so greatly in both flow and pollutional strength. So, it is impossible to assign fixed values to their constituents. In general, industrial wastewaters may contain suspended, colloidal and dissolved (mineral and organic) solids. In addition, they may be either excessively acid or alkaline and may contain high or low concentrations …

This section discusses variables of industrial wastewaters, how they can be generally classified, the importance of knowing the frequency of generation and discharge. 1- Compatible and noncompatible pollutants  Compatible pollutants can be defined as those pollutants that are normally removed by the publicly owned treatment works (POTW) system. Biochemical oxygen demand (BOD), suspended solids (SS), …

Biological treatment of industrial wastewater is necessary, when they contain large quantities of biodegradable substances. Such biological treatment may be used either with or without acclimatisation. Laboratory tests on wastewater for determining its BOD/COD ratio will help in determining the type of treatment required. Say for example, if this ratio is more than 0.6, the …