What Is Reverse Osmosis and How Does It Work?

Diffusion is the movement of molecules from a region of

higher concentration to a region of lower concentration.

Osmosis is a special case of diffusion in which the

molecules are water and the concentration gradient occurs

across a semipermeable membrane. The semipermeable membrane

allows the passage of water, but not ions (e.g., Na+, Ca2+,

Cl-) or larger molecules (e.g., glucose, urea, bacteria).

Diffusion and osmosis are thermodynamically favorable and

will continue until equilibrium is reached. Osmosis can be

slowed, stopped, or even reversed if sufficient pressure is

applied to the membrane from the ‘concentrated’ side of the

membrane.

Reverse osmosis occurs when the water is moved across the

membrane against the concentration gradient, from lower

concentration to higher concentration. To illustrate,

imagine a semipermeable membrane with fresh water on one

side and a concentrated aqueous solution on the other side.

If normal osmosis takes place, the fresh water will cross

the membrane to dilute the concentrated solution. In

reverse osmosis, pressure is exerted on the side with the

concentrated solution to force the water molecules across

the membrane to the fresh water side.

­To understand “reverse osmosis,” it is probably best to

start with normal osmosis. According to Merriam-Webster’s

Collegiate Dictionary, osmosis is the “movement of a

solvent through a semipermeable membrane (as of a living

cell) into a s­olution of higher solute concentration that

tends to equalize the concentrations of solute on the two

sides of the membrane.” That’s a mouthful. To understand

what it means, this picture is helpful

­On the left is a beaker filled with water, and a tube has
been half-submerged in the water. As you would expect, the

water level in the tube is the same as the water level in

the beaker. In the middle figure, the end of the tube has
been sealed with a “semipermeable membrane” and the tube

has been half-filled with a salty solution and submerged.

Initially, the level of the salt solution and the water are
equal, but over time, something unexpected happens — the

water in the tube actually rises. The rise is attributed to

“osmotic pressure.”

Reverse Osmosis is effectively used for purifying water

What impurities will reverse osmosis remove?

Reverse osmosis (RO) has become a common method for the

treatment of household drinking water supplies.
Effectiveness of RO units depends on initial levels of

contamination and water pressure. RO treatment may be used

to reduce the levels of:
Naturally occurring substances that cause water supplies to

be unhealthy or unappealing (foul tastes, smells or

colors).
Substances that have contaminated the water supply
resulting in possible adverse health effects or decreased

desirability.
RO systems are typically used to reduce the levels of total
dissolved solids and suspended matter. The principal uses

of reverse osmosis in Minnesota and the Dakotas are for the

reduction of high levels of nitrate, sulfate, sodium and
total dissolved solids.

RO units with carbon filters may also reduce the level of

some SOCs (soluble organic compounds) like pesticides,
dioxins and VOCs (volatile organic compounds like

chloroform and petrochemicals). An RO unit alone may not be

the best solution for these types of contaminants, but
installing a properly design-ed RO unit to reduce the

levels of other contaminants may provide a reduction in

SOCs and VOCs.

How to test your water?
Before installing any water treatment system be sure to

have the water tested. The test will identify the bacteria

and level of minerals that are present. Interpretation of
the test results will help determine whether treatment is

needed and what type of system or systems to consider. The

intended use of the water (drinking only, drinking and
cooking, laundry, or all household uses) will also help

determine the extent of treatment needed and the type of

system to select.
Note: RO systems are normally used to treat only drinking

and cooking water supplies so may not be preferred where

larger supplies are being treated. RO systems are not
appropriate for treating water supplies that are

contaminated by coliform bacteria.
The water test analysis and interpretation will provide

information about both naturally-occurring substances and

those resulting from human activity. Treatment of
contaminated water supplies should be considered only as a

temporary solution. The best solution is to remove the
source(s) of contamination and/or obtain a new water su

Disadvantages of reverse osmosis units
RO units use a lot of water. They recover only 5 to 15

percent of the water entering the system. The remainder is

discharged as waste water. Because waste water carries with

it the rejected contaminants, methods to re-cover this

water are not practical for household systems. Waste water

is typically connected to the house drains and will add to

the load on the household septic system. An RO unit

deliver-ing 5 gallons of treated water per day may

discharge 40 to 90 gallons of waste water per day to the

septic system

If You have been putting off optimizing Your website for a higher Search Engine results position, today is a good day to make Your start. SEO Techniques will make it much easier that You expected!

The following list of SEO Techniques will help you optimize your website so you will get a higher Search Engine Results Position (SERP). Some of the items can be done quickly — others will take a bit of time.

If you complete all the items on the following list of SEO Techniques, give the Search Engines some time to send out their bots to deep crawl your website, your site traffic will increase. Make sure you are ready for it!

Search Engine Optimization — What is it?

Optimizing your website so you will obtain a high search engine results position is what SEO Techniques is all about. It is reported that 65% of all websites visited start with a search from a search engine.

For people to find your site via a search engine, the site will require a high Search Engine Results Position (SERP). This means when they search keywords phrases like SEO techniques, they will find you site page on the first page of the search engine results. Ending up on the 10 page of the search engines results will not get you any traffic.

Getting a high SERP is a combination of a number of things. Leaving out any of the items on the following list of SEO Techniques can result in your page not getting as high a search engine results position as it could

21  Essential SEO Tips & Techniques

Small businesses are growing more aware of the need to understand and implement at least the basics of search engine optimization. But if you read a variety of small businesses blogs and Web sites, you’ll quickly see that there’s a lot of uncertainty over what makes up “the basics.” Without access to high-level consulting and without a lot of experience knowing what SEO resources can be trusted, there’s also a lot of misinformation about SEO strategies and tactics.

This article is the second in a two-part SEO checklist specifically for small business owners and webmasters. Last week, I shared 20 “don’ts.” Naturally, this week addresses the “Do’s”—things to make sure you include whether you’re hiring an SEO company or doing it yourself.

Small Business SEO Checklist: The Do’s

1. Commit yourself to the process. SEO isn’t a one-time event. Search engine algorithms change regularly, so the tactics that worked last year may not work this year. SEO requires a long-term outlook and commitment.

2. Be patient. SEO isn’t about instant gratification. Results often take months to see, and this is especially true the smaller you are, and the newer you are to doing business online.

3. Ask a lot of questions when hiring an SEO company. It’s your job to know what kind of tactics the company uses. Ask for specifics. Ask if there are any risks involved. Then get online yourself and do your own research—about the company, about the tactics they discussed, and so forth.

4. Become a student of SEO. If you’re taking the do-it-yourself route, you’ll have to become a student of SEO and learn as much as you can. Luckily for you, there are plenty of great Web resources (like Search Engine Land) and several terrific books you can read. Aaron Wall’s SEO Book, Jennifer Laycock’s Small Business Guide to Search Engine Marketing, and Search Engine Optimization: An Hour a Day by Jennifer Grappone and Gradiva Couzin are three I’ve read and recommend.

5. Have web analytics in place at the start. You should have clearly defined goals for your SEO efforts, and you’ll need web analytics software in place so you can track what’s working and what’s not.

6. Build a great web site. I’m sure you want to show up on the first page of results. Ask yourself, “Is my site really one of the 10 best sites in the world on this topic?” Be honest. If it’s not, make it better.

7. Include a site map page. Spiders can’t index pages that can’t be crawled. A site map will help spiders find all the important pages on your site, and help the spider understand your site’s hierarchy. This is especially helpful if your site has a hard-to-crawl navigation menu. If your site is large, make several site map pages. Keep each one to less than 100 links. I tell clients 75 is the max to be safe.

8. Make SEO-friendly URLs. Use keywords in your URLs and file names, such as yourdomain.com/red-widgets.html. Don’t overdo it, though. A file with 3+ hyphens tends to look spammy and users may be hesitant to click on it. Related bonus tip: Use hyphens in URLs and file names, not underscores. Hyphens are treated as a “space,” while underscores are not.

9. Do keyword research at the start of the project. If you’re on a tight budget, use the free versions of Keyword Discovery or WordTracker, both of which also have more powerful paid versions. Ignore the numbers these tools show; what’s important is the relative volume of one keyword to another. Another good free tool is Google’s AdWords Keyword Tool, which doesn’t show exact numbers.

10. Open up a PPC account. Whether it’s Google’s AdWords or Yahoo’s Search Marketing or something else, this is a great way to get actual search volume for your keywords. Yes, it costs money, but if you have the budget it’s worth the investment. It’s also the solution if you didn’t like the “Be patient” suggestion above and are looking for instant visibility.

11. Use a unique and relevant title and meta description on every page. The page title is the single most important on-page SEO factor. It’s rare to rank highly for a primary term (2-3 words) without that term being part of the page title. The meta description tag won’t help you rank, but it will often appear as the text snippet below your listing, so it should include the relevant keyword(s) and be written so as to encourage searchers to click on your listing. Related bonus tip: You can ignore the Keywords meta altogether if you’d like; it’s close to inconsequential. If you use it, put misspellings in there, and any related keywords that don’t appear on the page.

12. Write for users first. Google, Yahoo, etc., have pretty powerful bots crawling the web, but to my knowledge these bots have never bought anything online, signed up for a newsletter, or picked up the phone to call about your services. Humans do those things, so write your page copy with humans in mind. Yes, you need keywords in the text, but don’t stuff each page like a Thanksgiving turkey. Keep it readable.

13. Create great, unique content. This is important for everyone, but it’s a particular challenge for online retailers. If you’re selling the same widget that 50 other retailers are selling, and everyone is using the boilerplate descriptions from the manufacturer, this is a great opportunity. Write your own product descriptions, using the keyword research you did earlier (see #9 above) to target actual words searchers use, and make product pages that blow the competition away. Plus, retailer or not, great content is a great way to get inbound links.

14. Use your keywords as anchor text when linking internally. Anchor text helps tells spiders what the linked-to page is about. Links that say “click here” do nothing for your search engine visibility.

15. Build links intelligently. Submit your site to quality, trusted directories such as Yahoo, DMOZ, Business.com, Aviva, and Best of the web. Seek links from authority sites in your industry. If local search matters to you (more on that coming up), seek links from trusted sites in your geographic area—the Chamber of Commerce, etc. Analyze the inbound links to your competitors to find links you can acquire, too.

16. Use press releases wisely. Developing a relationship with media covering your industry or your local region can be a great source of exposure, including getting links from trusted media web sites. Distributing releases online can be an effective link building tactic, and opens the door for exposure in news search sites. Related bonus tip: Only issue a release when you have something newsworthy to report. Don’t waste journalists’ time.

17. Start a blog and participate with other related blogs. Search engines, Google especially, love blogs for the fresh content and highly-structured data. Beyond that, there’s no better way to join the conversations that are already taking place about your industry and/or company. Reading and commenting on other blogs can also increase your exposure and help you acquire new links. Related bonus tip: Put your blog at yourdomain.com/blog so your main domain gets the benefit of any links to your blog posts. If that’s not possible, use blog.yourdomain.com.

18. Use social media marketing wisely. If your small business has a visual element, join the appropriate communities on Flickr and post high-quality photos there. If you’re a service-oriented business, use Yahoo Answers to position yourself as an expert in your industry. With any social media site you use, the first rule is don’t spam! Be an active, contributing member of the site. The idea is to interact with potential customers, not annoy them.

19. Take advantage of local search opportunities. Online research for offline buying is a growing trend. Optimize your site to catch local traffic by showing your address and local phone number prominently. Write a detailed Directions/Location page using neighborhoods and landmarks in the page text. Submit your site to the free local listings services that the major search engines offer. Make sure your site is listed in local/social directories such as CitySearch, Yelp, Local.com, etc., and encourage customers to leave reviews of your business on these sites, too.

20. Take advantage of the tools the search engines give you. Sign up for Google’s webmaster Central and Yahoo’s Site Explorer to learn more about how the search engines see your site, including how many inbound links they’re aware of.

21. Diversify your traffic sources. Google may bring you 70% of your traffic today, but what if the next big algorithm update hits you hard? What if your Google visibility goes away tomorrow? Newsletters and other subscriber-based content can help you hold on to traffic/customers no matter what the search engines do. In fact, many of the DOs on this list—creating great content, starting a blog, using social media and local search, etc.—will help you grow an audience of loyal prospects and customers that may help you survive the whims of search engines.

Top 10 Don’ts for SEO

1. Don’t shove as many keyphrases into the copy as humanly possible. It’s not about the sheer volume of search terms you include. Yes, Google and other engines should be able to follow what the page is about. Yes, engines are looking to match a searcher’s query with search engine optimized content on your web pages, but which pages land at the top is decided through a series of calculations far more complex than any simple ratio. When you overload copy with keyphrases you sacrifice quality and user experience.

2. Don’t lose site of balance. If SEO copywriting isn’t about the percentage of keywords within the copy, then what is it about? Balance. You have two audiences with SEO copywriting: the search engines and your site visitors. But surprisingly, the balance doesn’t come with serving both masters well. The balance comes in how much you cater to the engines. You see, your site visitors always come first. However, if you write with too little focus on the engines, you won’t see good rankings. If you put too much focus on the engines, you’ll start to lose your target audience. Balance… always balance.

3. Don’t let someone else choose the keywords. If keyword research isn’t a service you offer, an SEO firm, keyword specialist or some other professional that your client hires will have to conduct the research. Don’t just accept keyphrases these folks toss your way. Ask to see the entire list with recommendations as to which terms would be best strategically. Then you, as the professional writer, can decide which will also work best within the copy.

4. Don’t sacrifice flow for numbers. This is a follow-up to number three and is a major issue with bad SEO copywriting. SEOs or clients sometimes insist on using hacked-up search phrases that simply don’t work in a normal sentence. An example? “Candies samples free.” Many copywriters will just grin and bear it, sacrificing quality and flow for the sake of competitive values or other numbers. The result is often some obnoxious sentence like, “If you’re looking for candies samples free, you’ve come to the right place!” Forcing a phrase into the copy at all costs never turns out well.

5. Don’t use keyphrases that don’t apply to the page. If you operate a site about wedding receptions, don’t try to force a search term about wedding dresses into the copy just because it pulls a lot of traffic. (A) Unless you sell, alter or design wedding dresses, it won’t be applicable. (B) Even if you manage to get the page ranked well for the phrase [wedding dresses], once the visitor clicks to your site and realizes you have nothing to do with wedding dresses, they will leave. It’s a waste of time and effort and it creates a poor user experience.

6. Don’t use misspellings and correct spellings on the same page. I fully understand that the misspellings of keyphrases can be valuable search terms. However, to mix correct spellings and misspellings within the same page of copy looks like you’ve got a bunch of typos in the content. It’s just not professional. Some writers will go for the old, “We rent limousines (sometimes spelled limosenes) for the most affordable prices in town.” I don’t care for that approach. It’s just not natural. Would you ever see brochure or newspaper copy that reads that way? I think not.

7. Don’t use keyphrases the exact same way every time. This is how we end up with horrible SEO copy that sounds like a 4th grader wrote it. (See #4.) There are lots of ways to use keywords in copy, not just one. In order to sound natural, you have to get creative with your keyphrase use. One way is to break up phrases using punctuation. Since search engines don’t pay attention to basic punctuation marks, you can easily write something using the search term [real estate Hawaii] that reads like this: “Currently there is an impressive selection of available real estate. Hawaii listings can be…” See? “Real estate” is at the end of the first sentence and “Hawaii” is at the beginning of the second sentence. The engines ignore the period so there’s no problem.

8. Don’t use all types of search phrases for every situation. There are many ways in which this “don’t” applies. One quick example is that of an ecommerce site. It wouldn’t be advisable to use specific, long-tail keyphrases on the home page of your site. They are much too specific in most cases and are better suited for individual product pages. Broader terms are typically best for an ecommerce home page. If you don’t understand the best applications for the various types of keywords, you’re likely to have lackluster results.

9. Don’t neglect ALT tags/image attributes. These tags are the ones associated with images on your pages and they carry a good deal of weight especially if the image is used as a link. The ALT text counts the same as anchor text in a text-based link. Depending on a few different factors, ALT text may be a good place for those misspellings mentioned in #6.

10. Don’t forget the chain of protocol. There’s a method to the SEO copywriting madness. The idea is not to get as many different keyphrases onto a page as possible. Just the opposite, in fact. Rather than having 12 different search terms used only one time each, you need to use two to four keyphrases (depending on the length of your copy) per page. The title, META tags, ALT tags, other coding elements and on-page copy need to support each other as far as keyphrase use goes. Your goal is to let the engines know that you have original, relevant content about a narrow topic.

The contribution of Machine Technology is felt in nearly every facet of industry – from the production of tiny nuts and bolts to large-scale industrial plant and equipment. Advances in this area continue to revolutionise manufacturing techniques and processes.

• CNC
• CMM
• Engineering Machinery
• Laser Technology
• Machine Technology Software
• Metal Working & Fabrication
• Machinery
• Metrology
• Plastics Machinery
• Tooling

Engineering technology and maintenance

Engineering technology and maintenance are what drive manufacturing and keep plants and machinery running properly and efficiently. Buyers can get up close and become thoroughly familiar with the features new technology offers and understand the benefits to their business.

• Bearings
• Engineering Supplies
• Occupational Health & Safety Products
• Hydraulics
• Industrial Transmission
• Lubrication
• Pneumatics & Compressors
• Valves & Pumps

modern manufacturing processes

The accuracy demanded by most modern manufacturing processes means there is an increasing reliance on Control and Instrumentation equipment. EMEX gives you the opportunity to see today’s finest measurement and control systems up close. It’s also a great place to talk through problems and solutions with suppliers.

• Instrumentation
• Measurement & Control
• Test Analysis Equipment
• Total Quality Management

• Vibration Analysis

Monitoring and automation products

Monitoring and automation products are essential to the proper operation and profitability of manufacturing industries. Benefits include improved plant throughput and productivity, enhanced worker safety, increased energy efficiency, higher process yields, waste product minimisation and improved product consistency. It is a worldwide business worth over $35 billion.

• Automation & Control Equipment
• Communication Systems
• Generators
• Labelling & Tracking Systems
• Material Handling & Conveying
• Motors & Motor Control
• Robotics

In the plant automation, monitoring, control and instrumentation fields, there has been a huge increase in the number of demonstrations over the last few EMEX shows. This reflects this growing sector and the ever-closer links between engineering, electrical and electronic technologies. Everything from valves, pumps, motors and sensors have a smart communication, monitoring or control device that can be teamed together.

While traditional equipment promises to put in a strong showing, you’ll also find the robots and sensors that are rapidly taking over manual tasks to increase productivity and accuracy.

• Engineering Plastics
• Materials Technology
• Welding Equipment & Supplies

Plastic Technology has been established since 1986 and is a leading remanufacture of Low Density Polyethylene (LDPE) film, tubing and bag products, as well as resin. We are capable of manufacturing LDPE film products made from discarded post consumer domestic, industrial plastic waste, or from new virgin material.

Plastic Technology

As an environmentally conscious manufacturer, Plastic Technology is working to assist industry in the environmentally friendly recycling of plastic waste materials, helping the environment, contributing to individual companies’ abilities to meet their triple bottom line responsibilities and saving potentially significant waste disposal costs. We offer a wide range of quality products, remanufactured from 100% recycled plastic.

By purchasing recycled products you not only help reduce the amount of waste going to land fill, and the amount of crude oil used in the manufacture of polymer, but also reduce the consumption of energy used in manufacturing, and the production of carbon dioxide (CO2), nitrogen-oxide (NO) and Sulphur-dioxide (SO2)

Operating from our Reservoir and Campbellfield film recycling, extrusion and remanufacturing plants, Plastic Technology utilises the latest in plastic production processes to manufacture blown film products for many nationally renowned commercial, industrial and household brands.

A sophisticated washing / treatment plant enables the business to produce resin for the remanufacture of LDPE film and bags made from 100% post consumer domestic and industrial plastic waste. The plastic waste is sorted, shredded and thoroughly washed to remove all dirt and other impurities. The plastic is then dried and extruded into high quality resin beads. Resin production currently exceeds 4,500 Tons per annum and all resin is used by Plastic Technology in its own film manufacturing.

Plastic Technology can offer a wide range of quality products, remanufactured from 100% recycled plastic collected primarily in Victoria. Increasing the use of recycled products has an enormous impact on the environment; independent studies have shown that products made from recycled rather than virgin polyethylene results in the following environmental benefits:

Reduction of energy consumption by two thirds.
Production of only one third of the sulphur dioxide and half the nitrous oxide.
Reduction of water usage by 90%.
Reduction of greenhouse gas Carbon Dioxide by two and a half tonnes.
It is estimated that 1.8 tonnes of oil are saved for every tonne of recycled polyethylene produced.
As a market leader in recycling and remanufacturing, Plastic Technology has demonstrated its ability to consistently meet environmental, social and industry responsibilities.

Recycling of plastics

Plastic Technology works closely with our recycling partners on a continual basis in order to respond quickly to changing requirements. We constantly review and improve the efficiency and effectiveness of our service.
We deliver:

Reduced disposal of plastic to landfill.

Increased re-use of LPDE plastic packaging, reducing energy use, reusing a diminishing natural resource.
Ensuring all Plastic delivered to Plastic Technology remains in the recycling chain, and within Australia.
Sustainable practices our recycling partners will be proud to actively promote to

business. Internally and externally and to community.
Compliance with National Packaging Covenant.
Plastic Technology is strongly committed to the development and integration of s

ystems and recycling management of LDPE throughout industry.  To this end, industry- and client-specific partnerships are continually being implemented, ensuring “best in class” recycling and “closed loop” services for our customer.

Plastic Technology has:

A proven track record in development of services, sites and facilities which cater f

or a diverse range of industries and business requirements
Established recycling and remanufacturing processes to provide the delivery level of service required, and significantly contribute to environmental responsibility, and future resource management.
Methodologies and quality systems to support our recycling partner’s environmental goals and responsibilities.
A demonstrated capacity to work with people at all levels, and a strong belief that partnerships with our customers produce the most successful outcomes.

In summary, Plastic Technology offers a total recycling and remanufacture service, which encompasses the efficient re-utilisation of our recycling partners LDPE waste, maximising efficient use of recycling and energy recovery, ensuring our recycling partners is at the forefront of environmental responsiveness at all times

conclusion

Plastic Technologies, Inc. (PTI) is recognized worldwide as the preferred source for preform and package design, package development, rapid prototyping, pre-production prototyping, and material evaluation engineering for the plastic packaging industry. PTI has become the thought leader for all things related to PET.

PTI specializes in PET (polyethylene terephthalate) packaging applications. PET is the most recycled plastic packaging resin and is often identified on packages with a #1 recycling code. We also offer exper

tise in other polyesters like PLA and in oriented polypropylene (OPP) preform and package development. Our core business revolves around the science of the reheat stretch blow molding process which the principles at PTI helped pioneer. Customers come to PTI for innovations in plastic material, processing, product design, and quality assessment.

PTI’s engineers and project managers are supported by:

Experienced CAD designers and tooling engineers
Computer-aided engineering including Virtual Prototyping and FEA
A state-of-the-art prototyping laboratory
A comprehensive materials and package testing laboratory
Quality Evaluation Equipment and Instrument Development engineers

PTI engineers have contributed to the commercial success of hundreds of packages around the world. PTI-Europe stands ready to service our European customers with offices in Yverdon-les-bains, Switzerland. Our latest initiative, The Packaging Conference, is a showcase for new packaging technology and a forum for manufacturers to meet and learn about the future in packaging.

Our sister manufacturing company, Phoenix Technologies International LLC, utilizes proprietary technology developed by PTI to prepare post-consumer recycled PET for applications in both food and non

-food packages. Phoenix was the first company to receive a Letter of No Objection from the FDA for the use of post-consumer recycled PET into food and beverage containers. Preform Technologies is leading supplier of specialty preforms with recycled PET content.