Alkaline cleaning is performed on metal parts at different times during the manufacturing process to remove oils, coolants and other metalworking fluids prior to electroplating.
Originally applied for drainage and irrigation, today Archimedes screws / screw pumps are commonly used in sewage treatment plants because they cope well with varying rates of flow and suspended solids.
Biological wastewater treatment uses microorganisms to break down complex materials present in the wastewater. It can aid with BOD reduction, odor control and more.
Having a safe BOD level in wastewater is essential to producing quality effluent. If the BOD level is too high then the water could be at risk for further contamination, interfering with the treatment process and affecting the end product.
Chemical feed and control systems are a vital component in all wastewater treatment applications. Each chemical has its own unique set of challenges that must be taken into consideration in the design, selection and application of the feed system.
Wastewater Clarification, or sedimentation, is a common and essential process in municipal and industrial wastewater treatment plants.
Wastewater disinfection systems prevent the growth of microorganisms, or pathogens, that produce human diseases. Careful measures must be taken when trying to do away with these microorganisms.
Industrial wastewaters containing dissolved metals are treated to reduce the metal contaminants to meet discharge requirements and/or achieve the water quality level needed for reuse and recycling.
Hazardous wastes are generated as the result of treatment steps performed on industrial wastewaters prior to discharge, or contaminant-containing groundwaters. The treatment process produces a residual waste, including sludge and spent media.
The US EPA has established standards that require the destruction of chromates prior to discharge to avoid the potential risks of surface and drinking water contamination.
Industrial wastewater pretreatment is the first step in wastewater treatment. Many industries use water directly or indirectly and produce a wet waste. Water sources can be different and impurities in the water will differ also.
Nutrient removal is achieved by reducing the levels of nitrogen and phosphorus levels with advanced wastewater technologies. Higher quality wastewater effluent is the result of this process.
Wastewater oil water separation is a process that many refineries or other oil processors undergo. Siemens provides applications that can successfully separate oil from wastewater.
Primary wastewater treatment, the second step in the wastewater treatment process, involves the physical separation of suspended solids from the wastewater flow using gravity filters.
Secondary wastewater treatment is the 2nd stage of wastewater treatment that takes place after the primary treatment process.
Spent caustic streams from refineries and ethylene production typically have a high chemical oxygen demand (20 - 500 g/L) and contain chemicals that are hazardous, inhibitory, and/or biorefactory.
Tertiary treatment is the next wastewater treatment process after secondary treatment. This step removes stubborn contaminants that secondary treatment was not able to clean up.
Trace organics are a key challenge facing the wastewater industry
Keep up with increased regulatory and quality control drivers that require better analytical and control techniques to stay within regulated, permitted and/or control limits. See how...