21976

If you havent started using virtual machines yet then you are missing the boat. Virtual machines create a virtual computer with in your computer. You can configure how much memory you use and how much of your hard drive you need. This great because if you are running Windows XP then you can test out Vista while XP is still running. The virtual machines act as real computer receiving their own ip address and you can use them a servers. This helps double the power of your hardware. Virtual machines do suck up a lot of memory so you will need at least a gig of memory.

I tried out several linux distoss on Virtual PC and Vmware and found some interesting tips. The first distro I used was Damm Small Linux on Virtual PC 2007 I installed virtual PC 2007 and then created the virtual machine with all the default options with 256mb of memory. I then started the virtual machine clicked on the CD tab selecting Capture ISO image and then I watched Damm Small Linux boot. To my surprise everything worked be default, I was now running Damm Small linux virtual machine with-in my winows xp laptop, cool. I was able to connect to the network both wired and wireless. Now I tried ubuntu and Backtrack linux. I did the same config for each machine with the same result, I could not get the mouse to work. not sure what the problem was but I am knew to using VMs.

Now I decided to try Vmwares Vmplayer, I soon discovered you need to create a virtual machine for the player. So through some internet research I discovered you can do this freely through the easy vmx website, type in easy vmx in google choose the simple one. I chose the generic linux OS and then typed in the name of the ISO image, the first one was Backtrack. You need to place that ISO in the same folder that the vmx file is located. So after that was done I started my virtual machine and every thing worked except the wireless card. Now this is probably because of me being a newbie and not knowing how to install a wireless card on the VM. I had the same result with ubuntu and Damm Small linux.

Vmware has many tools for you to create and configure your VM but the draw back is that they are not free. Virtual PC 2007 is free but it appears to have less functionality for linux. Try it out and double the power of your pc today.

Schaumburg computer Repair can install your wireless network today go to http://www.schaumburgcomputers.com If you are looking for tutorials about wireless networking visit the http://www.wirelessninja.com Keep your network simple and secure.

Virtual PC 2007 vs Vmware player and linux

# posted by 89048 @ 6:30 PM 0 comments

After anaerobic digestion, the sludge would contain about 35% organic and about 65% inorganic material. The digested sludge contains about 2,5% nitrogen, about 1% phosphorus and about 0,2% potassium. In addition to these so-called macro-nutrients, the sludge also contains the minor nutrients such as calcium, magnesium, iron, sulphur etc. Depending on the source of the waste-water, the sludge would also contain metals such as copper, chromium, nickel, zinc and cadmium. Certain components of the sludge may be advantageously utilised when the sludge is incorporated into agricultural land. In fact, as a result of the organic content and the presence of the nutrients and the trace elements essential for plant growth, sludge is generally valued as a soil conditioner. However, due to the presence of certain contaminants such as heavy metals, viable pathogenic and other organisms and complex organic compounds, careful consideration must be given to its potentially dangerous and hazardous properties when disposing of waste treatment sludge.

waste-water sludge is classified into three types; (a) unstable with high odour and fly nuisance potential, contains a high content of pathogenic organisms - primary or raw sludge falls into this grouping, (b) stable with low odour and fly nuisance potential, has a reduced content of pathogenic organisms - humus, waste activated and anaerobically digested sludges fall into this grouping, (c) stable with insignificant odour and fly nuisance potential, contains insignificant numbers of pathogenic organisms - anaerobically digested sludge when preceded or followed by pasteurisation falls into this grouping, (d) as type c but with contents of specified elements below prescribed limits.

The purpose of describing the waste sludge in terms of the above classification and placing certain restrictions on the disposal of waste sludge is to minimise nuisances and the transmission of pathogenic organisms either directly to man or indirectly through the food chain, as well as protecting water resources and the environment from pollution.

As indicated above, waste-water sludge contains nutrients which can be used beneficially to improve the condition of the soil. Sludge helps to break up heavy clay soils and improves the moisture retaining ability of sandy soils. Although the nitrogen, phosphorus and potassium contents of waste sludges are low compared with the inorganic fertilisers, these nutrients are not leached out as quickly as those from inorganic fertilisers.

Sludges derived from domestic waste-water treatment contains trace elements and minor nutrients in relative concentrations that are of the same order as required by most crops. This means that provided reasonable spreading rates are used, one should not experience metal accumulation problems with domestic sludges. However, when industrial effluents are present in the waste-water, significant concentrations of metals and other undesirable constituents may be present in the sludge and it becomes most important to ensure that the spreading rate is such that undesirable concentrations of metals etc, do not accumulate in the soil.

Where waste sludge cannot be disposed as a soil conditioner, it may be desirable or even necessary to co-dispose the sludge in admixture with refuse on a sanitary landfill site. The co-disposal of refuse and secondary waste-water sludge (in particular digested sludge) in sanitary landfills is being practised in many parts of the world, especially in drier areas which have a perennial water deficit.

Although the utilisation of waste sludge to improve soils used for agricultural process provides an attractive means of disposing of the waste sludge, there are many factors to be considered to avoid creating a secondary waste pollution problem that may be very costly and time-consuming to rectify.

Michael Russell Your Independent guide to Waste Treatments.

# posted by 89048 @ 5:48 AM 0 comments