Primary sedimentation tank is a little different than at the secondary sedimentation tanks, but the concept remains the same. No tank is both barren. There are more bacteria in both tanks. Both pools are the presence of BOD and bacteria. Both pools are occurring biological activity and people often ignore this. Primary sedimentation tank whose mission is to remove as many solids as possible to reduce the BOD load in the secondary clarifier. The primary clarifier is typical of the upstream receiving treated wastewater in the tanks of other processes such as trickling filters or activated sludge tanks.

 Why sedimentation tanks optimized
OPTIMIZE sedimentation tank
 
Primary sedimentation tanks is a little different than at the secondary sedimentation tanks , but the concept remains the same . No sedimentation tank is both barren . There are more bacteria in both tanks . Both pools are the presence of BOD and bacteria . Both pools are occurring biological activity and people often ignore this . Primary sedimentation tank whose mission is to remove as many solids as possible to reduce BOD load in the secondary sedimentation tanks . The primary sedimentation tanks is typical of the upstream process wastewater has been treated in the pools of other processes such as trickling filters or activated sludge tanks .
 
1 . Optimization means settling tank and control operational performance of the system ?
Your sedimentation tank look like ?
 
 
One in two forms , settling tanks of any shape you like ?
 
You know the solids flow through the bulkhead line can impact results with TSS BOD in the final effluent not ?
 
 
BOD bias can occur if biological or algae present in BOD samples . This will increase the final BOD and will have the potential to increase the cost of wastewater treatment last output , which in turn means that violate regulations allow or surcharge increases .
 
2 . Do you know of algae on the line in a sedimentation tank baffles can increase BOD not ?
A small amount of algae maintained or cleaned regularly can significantly affect the quality of the final effluent .
 
 
Do you know if there is an existing short line or object formed solids in the settling tank you ?
Well, if you have scum floating clump around your sedimentation tanks , or plant growth , which is a sure sign to see a few changes need to be made.
 
3 . How do you optimize the settling tank ?
Two simple tools to optimize and control sedimentation tank was measured using the device 's ability to settle solids ( settleometer ) and measuring instruments in the tank sludge ( sludge judge ) .
Measuring Instruments in tank sludge ( sludge judge ) ( or bottom sampling ) is used to measure the mud at the bottom of the settling tank . Measuring device capabilities deposition of solids is used for two reasons - a guide for you to quickly and easily how long the solids are settled down in the sedimentation tank . If only takes 3 hours to fully settle in and just 1-2 samples per hour in a sedimentation tank , more solids will flow through the bulkhead row because not enough time to settle .
 
If it takes 20 minutes for the solids settle down and vice versa , you need 6-8 hours to solids in the settling tank , obviously nervous substance that is stored too long . Sooner or later , the solids will float to the surface or the entire mud bed floating above the tank and potentially spill over the bulkhead line .
 
4 . Depth mud
Depth of sludge in settling tanks should be measured at the same time each day . The best time is during the period of maximum daily flow , because the settling tank operation under load speed high solids .
 
 
Adjust the flow rate of the circulating mud ( RAS ) must be adjusted according to the change of input flow of biomass and age .
 
One of the chief advantages over deep mud is the breakdown phenomena , such as activated sludge collecting device not appropriate winter , will be observed due to the unusual depth of the mud . A measure sludge plant is located in a collection system to measure sludge in sedimentation tank sludge depth as the depth increases and decreases in the mud that measure sludge plant is located . These abnormalities in the deep mud easily tracked by the indices measured ( profiles ) of depth through the mud settling tank .
 
5 . Why solids storage time in the tank is important ?
Wastewater retention time input or output in the primary processing related to the retention of solids too long often caused not only septic conditions , can produce odors , but also create conditions low DO . Low DO conditions that cause bacteria to create separate compounds with sulfides and / or organic acids . Retention time of wastewater inputs must always be kept down thieu.Tao the septic conditions may contribute to the generation of ash sludge settling tank , since the active solids in anaerobic conditions at the bottom of the settling tank and gas is generated causes the solids rise above the tank . This increases the solids through the overflow tank behind .
 
These conditions often lead to excessive growth of filamentous microorganisms later they will be part of biological aerobic conditions of the system . Sometimes , anaerobic sludge was sent to the primary settling tank sludge dewatering due to popular formats belt . This can also lead to an increase in septic conditions in primary sedimentation tanks , since the cultivation of bacteria in the system with which we adapt in terms of growth or facultative anaerobic .
 
One way to know if the solids are kept too long in settling tanks is if there is the appearance ash or sludge in a sedimentation tank gas emissions .
Ash sludge phenomenon occurs when there are arrays of tiny mud emerged as the top of the settling tank by the air bubbles trapped in the mud cotton .
The creation of ashes occurs when a few of which emerged in the settling tank sludge by air bubbles trapped in the mud cotton . This is usually caused by the formation of biogas as H2S or N2 mud when cotton is stored too long in settling tanks and oxygen depletion .
 
Bacteria constantly evolving in a sedimentation tank unless there is not much food . If the conditions are not good , then perhaps there will be more incidents .
The exhaust can be seen and often prevents the process of creating the ash mud . The generation of H2S exhaust can cause some major security issues .
 
6 . How to ensure the appropriate conditions in a sedimentation tank ?
Primary sedimentation tanks is a little different than at the secondary sedimentation tanks , but the concept remains the same . No sedimentation tank is both barren . There are more bacteria in both tanks . Both pools are the presence of BOD and bacteria . Both pools are occurring biological activity and people often ignore this . Primary sedimentation tank whose mission is to remove as many solids as possible to reduce BOD load in the secondary sedimentation tanks . The primary sedimentation tanks is typical of the upstream process wastewater has been treated in the pools of other processes such as trickling filters or activated sludge tanks . Any activity that is done in order to minimize sedimentation tank load of BOD and suspended solids in the activated sludge tank has the potential to improve the processing performance of the rear tank . Primary sedimentation tanks usually have high BOD load .
The best way to evaluate the performance of primary sedimentation tanks is considering removal efficiency of suspended solids . If sedimentation tank for erratic results or inconsistencies , seeking to improve the hydraulic load (calculated according m3/ngay/m2 ) . If removal efficiency of suspended solids not averaged from 40-50 % or BOD from 20-30 % , which exceeds the augmented time , to seek instability or lack of an active other .
 
Using the polymer dosage increased to allow removal of suspended solids in the tank load current .
This is a temporary solution because the solids may be added to the system load .
There are also some more plants for Ferric alum or to remove small particles , smooth and ash in primary treatment . This is not an optimal solution , because alum is added multiple times to create a large cotton mud . This can also remove excessive phosphorus and cause nutrient deficiencies . View 68 newsletter : troubleshooting caused by alum and iron .
 
7 . Optimize secondary sedimentation tanks are a little easier
Secondary sedimentation tanks meant not only to remove the solids and allows water to flow through the bulkhead line , but also meaningful connections with U is a dense liquids ( thickener ) . The purpose thicken the biosolids for two reasons . Some solids recirculation of part of the aeration tank to decompose BOD system , but also dense solids so the solids removed from the water ( dewatering ) and easier to clean water .
By thinking sedimentation tank as an extension of the aeration tank , settling tank continued in biodegradable and dehydration process ( polishing of the water ) the last time and bacterial sludge is processed cotton , Us systems capable of more easily optimized . Polymer used in the settling tank has the ability to significantly reduce or eliminate the possible optimization of the tank .
 
Processing performance of secondary wastewater system is determined by comparing the quality of wastewater overflow from the secondary sedimentation tank effluent quality input . Biological treatment tank to convert some dissolved organic matter and dissolved organic solids into suspended . However, the treatment is only successful when the organic solids are removed in the secondary sedimentation tanks . The change in the operation of the secondary sedimentation tanks have the most important effect to the overall operational performance of wastewater treatment plants .
 
One way to optimize what is happening in the activated sludge system and the parameters related to the problem is happening all parts of the system 2 . Again , remember the golden rule hand - " 5 parameters " need to be checked at waste water input and output . Today , check your sedimentation tanks !
 
Gold Hand Rule :
No matter when you use certain types of bacteria , or the bacteria used ( cultured ) available in the system , product or powder form of the water supply , all bacteria require a the minimum number of stable conditions , we called Hand Rule GOLD - the measure of an effective biological activity . Bacteria are not viruses , they need all the track conditions or the bacteria will not operate efficiently .
 
 If the above parameters are measured as the remaining parameters in the final effluent , whereas these parameters ensure that the conditions in the settling tank has met the requirements to continue to grow the bacteria in spigot and continue to the final reduction process rapid BOD ( BOD polishing off of ) this also ensures cotton sludge is sent to sludge dewatering is the best way and will reduce the amount of polymer needed. By following these guidelines , the use of polymers in settling tanks and sludge to minimum reflux is ready to return to the aeration tank to decompose more BOD .
 
Sometimes additives used in the biological aeration tank can optimize a system and a product of the solids better and better BOD or TSS removal if necessary . Reducing the amount of mud , especially if the waste water treatment plant concentrate can significantly cut costs solids handling , as it should have a small problem of increasing biomass calculations are made . Due to the volatility of changes in waste input of a number of plants , need a small amount of bacteria to maintain a daily basis have the ability to cut costs using polymer , while the water quality of the final output is increased .
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