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Organic Waste water
This waste water comes from human daily activities from shower, water closet, kitchen, laundry and others. This waste contains residue of organic matters, detergent, oil, human wastes, and also chemical use for domestic such as floor cleaners, bathroom cleaners and others. This waste in small amount seems very simple and not disturbing and it is look like enough using conventional septic tank and leeches trough earth and 100% the process depend on the environment. Schools, hotels, supermarkets, meat processors and other food factories produce large scale of this organic waste.
By looking at development of population plus the concentration of waste water in some places (such as hotels and other places) environment is not able to accept and process the waste anymore.
1. Amanaid H2O Solution Domestic
This system is developed in Australia by “JIM LOMBARD” a specialist in environmental who lives in Darwin Australia. This system is design especially for tropical climate, so it is very suitable for Bali or any other places in Indonesia. This system is best for treatment domestic waste water treatment, and maximum at 50 EP (or 10,000 liters per day).
Some basic details of how this system works we can see from some vital steps of this system.
1.1. Primary Tank
The first stage of the treatment is to separate the solids from the liquids. The solids, mainly toilet wastes, remain in the first compartment where digestion process takes place. The digestion is accelerated by the presence of anaerobic micro-organisms which multiply rapidly under ideal conditions and which will ensure that the offensive fecal solids are turned into an inert waste. Hence, the microbial action in the first tank should not be hindered by discharge of chemicals through drainage fittings e.g. chemical toilet cleaners.
1.2. Treatment Tank
The subsequent treatment stages are mainly concerned with the aeration of the liquid wastes. Once more, bacteria present in these liquids are used to assist in the aeration process. The micro-organisms are called aerobes and will thrive and multiply in the presence of oxygen. It is therefore important that a constant air supply is being maintained at all times. The air is supplied from a small blower located near the system.
1.3. Bio Media
The function of bio media is to generate aerobes type of bacteria, which function to dissolve the residue of leftover nutrition. The growth of this bacterium is equal to surface of bacteria media.
1.4. Air Volume (Air Pump)
At this stage the requirement for oxygen is approximately 8 liters per minute for every 200 liters of biological liquid waste. The growth of aerobes bacteria is equal to volume of oxygen pumped and equal to surface of bacteria media.
1.5. Diffuser
The function of this device is to split air into smaller particles so water can easily absorb the oxygen.
1.6. Sedimentation Tank
Following aeration, the liquid wastes are allowed to settle under quiescent conditions. Any solid particles, which are suspended in then aerated effluent, will settle out and are returned automatically to the first or second treatment stage. The clarified water, although it looks reasonably clean, may still contain harmful bacteria and pathogens which must be removed.
1.7. Disinfection
The bacteria are removed by a Disinfection process, such as chlorination, which by the way is the only chemical treatment that takes place in your system. While the clarified effluent flows into the irrigation pump-well, it comes into contact with chlorine or trichloroisocyanyric acid tablets. The contact will ensure the Disinfection of the final effluent, to criteria set by the regulating bodies, prior to irrigation onto your garden.
2. Amanaid H2O Solution for Comercial.
2.1. Pre Treatment
Incoming waste water must meet several conditions before entering the system, because the system built based of biological method. As a result, several things which potentially to disrupt the growth of bacteria must be neutralized; for example; excessive of chlorine (or other disinfectant), large particles which difficult to turn into liquid form. For example liquid waste from restaurants or meat factory which contain high FOG (Fat, Oil & Grease) so before entering Biological Oxidation the amount of FOG has to be reduced greatly. Grease Converter has to be installed as Pre Treatment for reach FOG less than 75 mg/L.
2.2. Stilling Tank
The function of stilling tank is to reduce speed as fluid entering the system. Because with high speed of waste water entering system will interfere the accumulation of sludge in the bottom of tank.
2.3. Biological Oxydation
The fluid in this stage will enter a tank with diffusers which placed in the bottom of the tank. Using air pumps this will mix the fluid and distribute oxygen into the fluid. When oxygen dissolves in the fluid, it will create aerobic habitat where in this habitat the micro organism and sludge with form into “HUMUS”. Calculation of Oxygen consumption and active sludge growth so oxidation and degradable of waste water will be formed. Lower in Biological Oxygen demand and Nutrients and phosphate also will happen in this stage.
After several hours of this process the aeration process will be stopped by shutting down the air blower; when this happen the active sludge or this bio mass will be settled to the bottom of tank. When the sediment goes to bottom of the tank, all biological waste will be trapped in the bio mass. Then after few minutes the clear water on the top of the surface which will advance to the next step by opening automatic valve. After that the oxidation process will begin from beginning. All these processes are controlled by automatic system using timer and other electronic devices.
This process breaks the solid organic materials effectively. When the oxygen is charge into the system, an ideal aerobic environment is formed. In this condition the micro organism and active sludge will growth. With the balance aeration and a good healthy activated sludge, digestion and oxidation of the organic waste will occurs.
2.4. Secondary Media treatment
At this stage, the waste water which through biological oxidation process will entering a compartment with bacteria media made from corrugated pipe. The function of this media is to speed up the process of colonies growth. The growth of these bacteria is equal to surface of media and debit of oxygen and residue of nutrient. At this time also the oxygen has a lot more chance to enter the fluid.
2.5. Sedimentation
Following aeration, the liquid wastes are allowed to settle under quiescent conditions. Any solid particles, which are suspended in then aerated effluent, will settle out and are returned automatically to the first or second treatment stage. The clarified water, although it looks reasonably clean, may still contain harmful bacteria and pathogens which must be removed.
2.6. Disinfection
The bacteria are removed by a Disinfection process, such as chlorination, which by the way is the only chemical treatment that takes place in your system. While the clarified effluent flows into the irrigation pump-well, it comes into contact with chlorine or trichloroisocyanyric acid tablets. The contact will ensure the Disinfection of the final effluent, to criteria set by the regulating bodies, prior to irrigation onto your garden.
2.7. Mechanical Filter
Sand filter also can be applied as an optional for final result. Residue of backwash will be recycling to Inlet within the Sewage Treatment Plan. |
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