Grease skimmer conquers the most demanding interceptor pit
Courtesy of Abanaki Corporation
North Star Steel, a seamless pipe mini-mill in Youngstown, Ohio, needed a cost-effective, low maintenance solution to oil and grease contamination of their descaling water system, including the sand beds filtering this circulating water.
During a day's operation, up to 100 gallons of oil and grease from open gears, drive chains, bearings and other sources get washed into wastewater flumes by cooling water. The flumes carry the water to concrete interceptor (descaling) pits located below grade and upstream of the sand beds. The flow rate of the system is about 10,000 gallons per minute.
Over the years, Dave Giancola, plant maintenance engineer at North Star Steel, has tried floating booms, floating suction (pump) skimmers and moving media in the form of tubes and mops to remove the oil and grease - all with no success.
Giancola then turned to Abanaki Corporation, Oil Skimmer Division in Chagrin Falls, Ohio for a solution. After analyzing the situation, Abanaki's belt style oil skimmer, the Grease Grabber® was recommended and tested at North Star Steel. The Grease Grabber makes use of the differences in specific gravity and surface tension between oil and water. This allows the belt skimmer to attract grease, oil and other hydrocarbon liquids as the belt passes through the surface of the water, even under the most turbulent conditions. Because of the skimmer's sleek construction, it was easily installed on the catwalk at the edge of the mill's final interceptor pit.
According to Giancola, 'At first, our personnel were skeptical that the Grease Grabber's smooth belt could really pick up oil and grease. However, it wasn't long before they were seeing it remove 400 - 500 gallons of oil and grease a week from the interceptor pit.'
The only maintenance required has been routine cleaning of the unit's wiper blades, a procedure that takes about 20 minutes a month.
Controlling scale in water systems helps prevent legionella
The Legionella bacterium, Legionella Pneumophila (LP), the fundamental agent of Legionnaire’s Disease, is a water-based organism, which causes infection when inhaled in an aerosol form. Legionnaires` Disease acquired its name in 1976 when an outbreak of pneumonia occurred among persons attending a convention of the American Legion in Philadelphia. Later, the bacterium causing the illness was named Legionella. Normally associated with cooling towers and evaporative condensers, mist machines, humidifiers,...
Extending the life of wash solutions
Simple things we learn early in life might well apply to a basic need of the parts washing market: To look good - wash well before you "dress." Washing metal parts is a necessity prior to painting or plating: If the wash is not properly prepared and foreign substances are not removed from the metal in the wash phase, the finish - the "dress" - may not hold properly, and it may not wear well. Essentially, the wash is an imperative step in the process. And, as one manufacturer of parts washers discovered, a good...
Gulf Oil Spill Sparks Boom At Cooley
Article covers Cooley fabric being manufactured furing Gulf oil spill. In a typical year, the Cooley Group would churn out between 30,000 and 40,000 linear yards of a membrane the company calls Coolthane, a highly durable material designed to contain hazardous spills. But this is not a typical year. For the last two months, the Pawtucket manufacturer’s factory on Esten Avenue has cranked out 20,000 to 25,000 linear yards a week for customers that in turn are assembling the membrane into miles upon miles...
Creative skimmer solution endures environment and reduces costs
WCI Steel, a steel manufacturer in Warren, Ohio, needed an uncommon solution to a fairly common problem - removing grease and other contaminants from their outdoor circulating water system. They turned to Abanaki Corporation, Oil Skimmer Division in Chagrin Falls, Ohio for the answer. Each week, WCI Steel uses 200 gallons of grease on a roll out table to keep steel slabs from rolling off the caster. Much of this grease is washed into a 40,000 gallon outdoor interceptor pit by cooling water sprayed on the newly...
Variability in the mobilization of sediment and phosphorus across 13 European soils
Received for publication January 25, 2008. The objectives of this study were to examine the variability in mobilization and transport of primary particles and associated total phosphorus (TP) in sediments eroded by overland flow from 13 European arable soils and to consider the empirical support for more process-based alternatives to modeling phosphorus (P) transfers. The 13 soils were subjected to simulated rainfall in laboratory experiments. Rainfall was applied to a soil flume (0.5 x 0.25 m) for 30 min at...
Potato Flume Water 1
This client transports potatoes from their receiving dock to the processing area of the plant in a water flume. This process removes the dirt from the fields. The pH was 6.3 and did not require pH adjustment. The sample was tested with I, H, and K and it was determined that the K was the best product for clarity, reduced dosage and floc size. The samples were treated with 0.13 grams of Floccin-I, H, K in a 100 ml jars. The dosage equates to a treatment of 10 lbs/1,000 gallons. There was a settling test conducted...
Potato Flume Water 2
The facility was paying to have their water hauled off site as a means of disposal. The facility was using an average of 20,000 gallons/day of fresh water to operate the flume system used to transport the potatoes from the dry storage sheds to the processing room. The flume sump would fill up with solids and required weekly cleaning. The settle dirt and organic material created a bad odor and an increased chlorine demand at the final sprays prior to packing. Using a mixing tank with the addition of Floccin-I...
Food Processor Flume Cleaning with Rotary Screen
Food Processor Flume Cleaning Flume Cleaning with Rotary Screen Flumes that are used to transport food from the trucks or storage facilities (tomato, potato, carrot processing) build up with settled solids as the product is conveyed along the flumes. Over time, these solids reduce the flow rate in the flumes and need to be cleaned out to maintain the same product conveyance to the processing plant in tons/hour. The silt and debris that builds up in the flumes can decreases in flume...
Optimization of descaling nozzles in a hot strip mill
In hot rolling, the surface quality of the finished strip depends on the performance of the descaling equipment in the roughing and finishing trains. The design of descaling systems and nozzles has been improved over the years step by step, thus increasing the kinetic energy of the spray water and enabling reproducible spray patterns. At Thyssen Krupp´s hot strip mill in Bochum the descalers have been modernized several times since 1992. Thus downgrading of hot strip due to scars could be reduced by more than 50%.
Jatropha as Bio-Diesel
Introduction:- Jatropha curcus L. belongs to the family Euphorbiaceae. It is believed to be a native of South America & Africa but later spread to other continents of the world by the Portuguese settlers. The Arabs have been using this plant for medicinal purpose. Today it is found in almost all the tropical & subtropical regions of the world. There are more than 200 names for it all over the world, which indicates its significance to man and the various possibilities of its use. In India, Jatropha curcus...
Identifying and Strengthening “Weak Links” in the Fog Management Chain
ABSTRACTRecently, EPA presented statistics that cited grease accumulation in sewers as the leading cause of sewer blockages resulting in sanitary sewer overflows (SSOs). Such blockages can be attributed to fats, oils, and grease (FOG) discharged from food preparation and manufacturing facilities, concentrated residential areas, and even single family homes. Municipalities and wastewater system managers have responded to this problem by implementing FOG management programs, often successfully reducing FOG blockages...
Analytical Solutions for Free-Hydrocarbon Recovery using Skimmer and Dual-Pump Wells
Accidental release of petroleum hydrocarbons to the subsurface may occur through spills around refineries, leaking pipelines, storage tanks or other sources. If the spill is large, the hydrocarbon liquids may eventually reach a water table and spread laterally in a pancake-like lens. Hydrocarbons that exist as a separate phase are termed light non-aqueous phase liquids (LNAPL). The portion of the LNAPL that is mobile, not entrapped as residual saturation, is termed free product. This paper presents new analytical...
Tertiary Treatment of Wastewater for Reuse in China
China has water shortage problems, especially in its northern region. The accelerated industrialization in the country further compounds the issue. A drastic corrective measure is the South-North Water Diversion Project which will transfer 40 billion m3/year of water from the south to the north. Other less dramatic abatement measures are water pollution control and wastewater reuse practices.Severn Trent Services has participated in three projects in China that involve tertiary treatment of wastewater for reuse....
Oil/Water Separation Technology
Oil skimmers are simple, dependable and effective tools for removing oil, grease and other hydrocarbons from water. They usually pay for themselves within a few months. In order to ensure the oil skimmer you choose is right for your operation, there are certain steps you can follow. To view the full article click here (PDF - 413KB)
Evaluating Efficacy of Technology For Chemical Free Bacteria & Legionella Control in Circulating ...
Abstract This paper describes an alternative, patented, non-chemical cooling water treatment system that has proven to be effective in controlling/eradicating bacteria and Legionella. The VRTX system is a side-stream treatment system and includes a mechanical VRTX unit and a separation/filtration unit. The VRTX unit works primarily on the principals of Controlled Hydrodynamic Cavitation (CHC). The CHC actions destroy microbial cell walls and converts dissolved calcium and bicarbonate ions into aragonite calcium...
Choosing the right oil skimmer for economical fluid management
Oil skimmers are simple, dependable and effective tools for removing oil, grease and other hydrocarbuns from water. Although designs var’, ah oil skimmers rely on the fluid properties of specific gravity and surface tension. Most use a moving medium tu remove floating oil from the fluid’s surface, as shown jo Figure 1 (The exception is a floating suction skimmer.) Floating oil and grease cling tu skimming media more readily than water, and water has little affinity for the media. This alluws skimming media in the...
The role of solution chemistry in the stability and detachment of cohesive kaolinite particles
The effect of solution chemistry on the behavior of kaolinite in three different situations was investigated: (1) the detachment of kaolinite from glass beads in a fluidized bed, (2) the erosion of kaolinite deposits in a laboratory flume and (3) the determination of the stress-strain rate relationship of concentrated suspensions in a rheometer. The experimental results from these three different approaches could be explained in terms of changes in mode of particle associations which in turn could be characterized...
ON-SITE SEWAGE SYSTEMS: NEW OUTLOOK FOR DECENTRALIZED WASTEWATER TREATMENT
As researchers analyze the soils’ ability to absorb discharge, more knowledge is gained about alternatives to septic tanks and standard drain fields that include peat filter systems, constructed wetlands and drip irrigation. ONE out of every four American households currently treat and release wastewater on their own property. Although most people assume that on-site systems are confined to rural areas, in fact half are in suburbs and a few even remain within the confines of large cities. Public works engineers...
Choosing an Oil Skimmer for the Machine Shop
Advantages of Using an Oil Skimmer: The use of an oil skimmer in the machine shop setting holds many benefits. Removing the oil from a machine coolant tank will initiate some esthetic benefits such as cutting down on the amount of smoke generated from the cutting tool coming into contact with oil laden coolant. When a machine is shut down for the weekend, oil has a chance to come to the surface of the coolant tank. Bacteria that are living in the coolant tank use up the dissolved oxygen in the coolant mix,...
Ion Exchange Systems.
When properly applied, ion exchange for concentrated ion recovery is by far the best available technology. Where effluent streams can be filtered and ions requiring different regenerants can be segregated, ion exchange is usually the most cost effective and least capital intensive solution. We provide 4 levels of integration to cover most applications and capital budgets. The variations in the system configuration trade your labor and attention for our automation. As you invest capital, the cost of operation,...
Halogenated Volatile Organic Compounds
Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste disposal areas, oxidation ponds/lagoons, paint stripping and spray booth areas, pesticide/herbicide mixing areas, solvent...
Environmental Effects of Acid Rain
Air Pollution Creates Acid Rain Scientists have discovered that air pollution from the burning of fossil fuels is the major cause of acid rain. Acidic deposition, or acid rain as it is commonly known, occurs when emissions of sulfur dioxide (SO2) and oxides of nitrogen (NOx) react in the atmosphere with water, oxygen, and oxidants to form various acidic compounds. This mixture forms a mild solution of sulfuric acid and nitric acid. Sunlight increases the rate of most of these reactions. These compounds then...
How Do I Get That Oil Out of There?
It is a common question asked every day by people in all fields of industry. Machine shops, steel mills, industrial manufacturers, and many others are faced with the problem of removing oils from coolants and wastewater on an everyday basis. They are faced with high disposal and maintenance costs. Some manufacturers are charged extreme amounts to have their contaminated water treated properly by their local water treatment facility. Companies look for effective ways to remove the oil from their wastewater or...
Cleaner Production Demonstration Project at Schweppes Cottee`s
Table of contents Executive Summary 1. Review of Schweppes Cottee´s Operations 2. Planning and Organisation of the Schweppes Cottee´s Cleaner Production Project 3. Cleaner Production Initiatives 4. Review of Project 5. Concluding Remarks 6. Schweppes Cottee´s Perspective Executive Summary The Cleaner Production Demonstration Project is an initiative of the Environment Australia - Environment Protection Group (EPG). The aim of the Project was to raise the awareness of Australian industry and...
Common Treatment Train for Fuels
A treatment train is the combination of different treatment technologies. A system diagram of a common treatment train for fuels is illustrated below. The fuel contaminated soil is first treated using a soil washing process. Water is injected at the up stream side of the contaminated site. Surfactant or other additives may be added to enhance the soil washing effect. Contaminated water is pulled out through extraction wells installed at the down stream side for further treatment. An in situ bioremediation process...
Natural Attenuation in Soils
Introduction Surface and subsurface soils have different characteristics in natural attenuation. Mobile contaminants in subsurface soils diffuse into soil vapor and aqueous phase and thus are relatively easily subject to natural subsurface processes that can attenuate these contaminants. Most high-molecular-weight (persistent) organic and many inorganic contaminants will be immobilized in the subsurface soil matrix. These persistent organic contaminants often are difficult to degrade and the inorganic metals are...
Slurry Phase Biological Treatment
Slurry phase biological treatment involves the controlled treatment of excavated soil in a bioreactor. The excavated soil is first processed to physically separate stones and rubble. The soil is then mixed with water to a predetermined concentration dependent upon the concentration of the contaminants, the rate of biodegradation, and the physical nature of the soils. Some processes pre-wash the soil to concentrate the contaminants. Clean sand may then be discharged, leaving only contaminated fines and washwater...
In-well Vapor Stripping - Technology Overview
In-well vapor stripping technology involves the creation of a ground-water circulation pattern and simultaneous aeration within the stripping well to volatilize VOCs from the circulating ground-water. Air-lift pumping is used to lift ground-water and strip it of contaminants. Contaminated vapors may be drawn off for aboveground treatment or released to the vadose zone for biodegradation. Partially treated ground-water is forced out of the well into the vadose zone where it reinfiltrates to the water table....
Temperature Correction Study for HR(PA) Membrane
Introduction Flow rate testing was performed on MS19 and MS12 elements (217 and 219 elements, 26 mil-spacer) to establish a temperature correction curve for current HR(PA) membranes. The results obtained were evaluated against the existing Osmonics® correction curve and other manufacturers’ information. Salt passage characteristics and the effect of elevated temperature on membrane performance were also noted during the study. Conclusions 1.- Good correlation with the theoretical temperature correction curve...
Skimming Oily Wastewater
As large generators of oily wastewater tighten effluent controls, the U.S. Environmental Protection Agency (EPA) is targeting smaller generators. Some of the firms receiving their attention are smaller manufacturing plants, automotive garages, mobile equipment service shops and truck farms. Many of these firms do not have access to a sanitary sewer system that will accept oily wastewater. Because disposal in storm sewers also is prohibited, they frequently use injection wells, septic system drainfields, dry wells...
The Asbestos Management and Maintenance Program
STEP ONE: ASSESSMENT AND SURVEYThe first step of the Asbestos Management Program is to do an asbestos survey to assess the location, identify the type of asbestos, the condition of the asbestos and identify a maintenance record. This asbestos inventory or assessment is usually carried out by an independent consulting firm. This assessment or survey will include: Identification and location of the Asbestos Containing Materials (ACM) Assessing the condition of asbestos and its accessibility. Preparing a long term...