Pollution Prevention for Tannery Industry Essay Example

Pollution Prevention for Tannery Industry Paper The assessment identified following pollution prevention opportunities at this facility: recycling the spent chrome tanning wastes, oxidize the sulfide containing wastes, decreasing the volatile organic discharge by changing finishing materials, decreasing water use by batch washing, and using solid wastes from the waste stream as fertilizer. Chromium recycling. This step allows the collection of the spent chrome Nanning solutions, without dilution or contamination, for use in the pickle and tanning process. Since the tannery also tans splits, the spent chrome tanning solution can be used here as well. The tanning of splits results in very good fixation of chromium, so the concentration of chromium in the final effluent should meet effluent regulations. This system results in a saving of about 25 percent in the chromium chemicals used. Solvents. The suppliers of finishing products have developed water-based lacquers with significantly lower volatile solvent contents. These materials are now widely accepted as quality products, and their use is strongly advised. Process Water. In some hide wetting processes there is an opportunity to recycle the final rinses. The final rinse wastewater in this process is compatible with fluids used for the first wetting of the hides. Solid Waste. Elimination of solid leather waste discharges through the use optimizing in reconstituted leather will ease the burden on landfills. Capital Intensive Modifications. Eliminating sulfides from the effluent is very important, as they will corrode pipes, cause objectionable doors, and may cause fatal accidents. We will write a custom essay sample on Pollution Prevention for Tannery Industry specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Pollution Prevention for Tannery Industry specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Pollution Prevention for Tannery Industry specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The sulfide-lime solution, and washes from this process, can be collected without contamination from other solutions. These collected wastes can be placed in a tank and the sulfides oxidized by air with a catalyst. This method is effective and can destroy the sulfide in 4-8 hours. At this point the lime waste, with high BODY and suspended solids, can be used to neutralize the acid wastes that are being continuously discharged. The acid and alkaline wastes from the tanning process will react to produce a expectoration of much of the suspended lids and BODY. This is done with a mixing tank and automatic pH control. Coagulants can also be added at this point. The neutral streams can then flow to a primary clarifier for the removal of suspended solids as sludge. The sludge can be dewatered in a sand bed to more than 50 percent solids for disposal. Although this effluent is somewhat high in BODY, over 80 percent of the pollution load have been removed. The sludge is a good soil conditioner, and if used as such, will eliminate possible high disposal costs. Secondary Treatment. In the future, a secondary treatment system can be added for BODY removal. The secondary system need only be as large as needed for the clarified wastes, and it may consist of a trickle filter, a secondary clarifier, and/ or a filter press. Environmental and Economic Benefits implementation of the suggestions will lead to a number of positive environmental and economic benefits. Chromium recycling will decrease the chromium in the discharge by 80-90 percent. It decreases chromium to less than 3 MGM/l. Costs were estimated at $20,000 (US), savings at $60,000 per year ND therefore payback period of 4 months. The reduction of volatile solvents will decrease VOCE releases to the atmosphere by 60-90 percent. Changes to water usage patterns will decrease effluent volume by 20-40 percent. Elimination of solid leather waste discharges through the use of trimmings in reconstituted leather eases the burden on landfills. This decrease leather waste by 60-80%. Costs were estimated at $1 0,000 (US). Destroy sulfides by air oxidation decreases sulfide wastes by 95- 98 percent. Costs were estimated at $30,000. (US) With primary and secondary treatment, the BODY an be reduced by 75 percent.

How to Write a Powerful Argumentative Essay Hook Sample

How to Write a Powerful Argumentative Essay Hook SampleAn argumentative essay hook is one of the most essential parts of your resume. And while many people think it's just a piece of paper with nothing to do with you, this is just one of those golden pieces of writing, that will make you stand out and get your application noticed.To get an argumentative essay hook sample that fits your needs, all you need to do is take some time out to go through an argumentative article you found online. Once you have your own, you can go through the rest of the resumes that were handed in and find a way to insert your own into it. The following article will explain how to create a clear argumentative essay hook that will help you become the person you have always wanted to be.When writing your essay, it should start out with a strong intro. This should be more of a detailed introduction and set the tone for the rest of the essay. It should also set the context for the rest of the letter.Next, in yo ur essay, you should give a one sentence description of your life as a whole. This is also known as a teaser, and is what readers are most likely to focus on first. You should include your main point and then describe what you are trying to convince the reader. It's important to express what you have to say concisely, without using too much grammar or new language.If you don't have good examples to use, look around online and see how other writers use their persuasive letters. You can also find good examples by doing a search. One key step to writing a persuasive essay is to follow the advice of a well-known author and never steal ideas from them.A quality writer will take the time to make sure that you come across as confident and presentable. He or she will not make any mistakes and will make sure you're perfectly expressing your opinion. A copywriter will not have to rewrite your essay, since the piece has already been written. He or she will only change the headlines and other e lements of the letter in order to make it consistent.While it may be frustrating to write a letter for someone who does not really want to hear what you have to say, you need to remember that this is the only chance you will ever get to communicate your idea and make a better impression on this person. A letter can only hold so much weight before the other person realizes you aren't really serious about them.In order to get an argumentative essay hook sample, you need to know the basics of copywriting, such as how to use the letters and essays as a platform to convey your message and build up your credibility. Most good writers have also taken the time to learn as much as they can about resume writing. Therefore, you have the advantage of knowing that if you apply and are accepted, you won't be wasting your time and effort.