Activated Sludge

Activated Sludge or Suspended Growth treatment system is the most common system to treat waste water. The system uses biological treatment processes in which microorganisms are maintained in suspension within the liquid. In suspended growth treatment systems, microorganisms convert the organic matter or other constituents in the wastewater into gases and cell tissue. The most common type of aerobic system which utilizes activated sludge (AS) system are EA (Extended Aeration), CAS, OD (Oxydation Ditch) and SBR (Sequential Batch Reactor)

Activated Sludge (AS) system by definition consists of three basic components that are, (1) a reactor in which the microorganisms responsible for treatment are kept in suspension and aerated; (2) liquid-solids separation, usually in a sedimentation tank; and (3) a recycle system for returning solids removed from the liquid-solids separation unit back to the reactor. An important feature of the AS process is the formation of flocculent settleable solids that can be removed by gravity settling in sedimentation tanks. The Hydraulic retention time in the reactors is a very critical parameter and it can be as low as 8 hrs for CAS (Conventional Activated Sludge) or 6 hrs for hybrid and as high as 24 hrs for an EA system.

 

Activated Sludge

Activated Sludge or Suspended Growth is a common aerobic system normally used to treat waste water or leachate before the effluent can be discharged into water ways. Activated Sludge Systems normally used or reffered to such as EA,CAS,OD,SBR and IDEA .

A typical component in any wastewater plant : Screening,Grit Grease Chamber,  Biological Reactor and Clarifier.

It is rainning

Well , I found my password and email today. Its heavy rain today, and do we know what is meant by rain water harvesting. Every house should have gutters and down pipe either PVC or metal such as stainless steel or galvalnized iron. You need a tank to store rain water and distribution pipe come with valving system to distribute the water. You can use this collected rain water to shower your plants and front porch cleaning... Happy new year

We are deceiving because we hate Proton

I have read and heard people said bad things about Proton new MPV Exora. Well I have seen and driven many cars but none is Proton. They have problems but never being highligted and I have two Japanese cars and I have to spend more than 20K to maintain. Well first thing they said Exora is under power, but the Japanese popular MPV which is a Lorry or truck covered with sheet metal to resemble MPV is 1.3 or 1.5 Liter engine only. It use out dated leaf spring and old rear wheel drive system. On a bumpy road, it run like an old horse cart. This so called lorry/MPV is originally meant for Indonesian market.

Another Japanese MPV is originally a car converted into the so called MPV actually for Indonesian Market. But this one is much better than the first Japanese MPV mentioned earlier.

Well Proton Exora is designed and built to be a real MPV not a lorry or Car. It has 125 hp CPS engine which can beat the speed limit on the highway. I don't need to run 160km/hr on the highway with my family. But Proton Exora definetely can. So next time, if you hate Proton don't be deceived by Japanese marketing tricks. Get the real MPV. If you can afford by Exora. Or at least if you are driving "Old Japanese Lorry" don't say bad things about Proton if you aren't sure.

Why Car Cannot Use Water as Fuel

Can we run our cars on water? Of course can. During our high school science class, we learnt in our chemistry course that water (H2O) can be converted into hydrogen and oxygen gases. Hydrogen is a highly combustible and if properly controlled can run our gasoline engines. Unfortunately, human being need water more than our cars.

Water Crisis

I am not a prophet who can predict the future. But in year 2010, we will have a water crisis. Forget about higher price of Petroleum and other energy sources. Human Being cannot live without water. Our ancestors survived for thousand years without the discovery of petroleum and other sources of modern energy.

So how are we going to resolve water crisis? Have we implement a proper water management system? What steps need to be taken? For the time being, do not waste water.