Sri Ramakrishna Mission Vidyalaya Polytechnic College, Coimbatore - 641 020

What is dispersion trench? A dispersion trench is a stormwater facility designed to receive stormwater runoff and disperse it evenly through vegetated areas on your project site. Dispersion Trench : In this effluent is allowed to enter into a masonry chamber called dispersion box.  From dispersion box effluent is uniformly distributed through an underground network of open jointed pipes into absorption trenches, called dispersion trench What is the difference between dispersion and infiltration? A dispersion trench is much like an infiltration trench, except the top is designed to allow for sheet flow of stormwater. This is used where infiltration is not achievable, or there is sufficient vegetated flow path for stormwater dissipation. What is the size of the dispersion trench? Maximum length of trench shall not exceed 50 feet from the inlet sump.  General sizing criteria:   10 feet of trench for every 700 square feet of roof area.  Minimum 25 foot vegetated flo...

Phytoremediation: Types & Its Advantages It’s a plant-based method that uses living plants to remove toxins from soil and water.  Bioremediation with plants is known as phytoremediation.   It is a natural biological process that degrades xenobiotic and recalcitrant substances that cause pollution in the environment.  Because the name Phyto means ‘plant,’ the remediation is mediated by the plant system.  The best plants for phytoremediation are: Indian mustard, white willow, poplar tree, Indian grass, and sunflower.  These plants absorb heavy metals and remove toxins from the soil and water.  1. Indian mustard: Brassicaceae species, particularly Indian mustard, are extremely useful for accumulating specific metals while also producing large amounts of biomass.  2. The roots of white willow plants accumulate lower levels of heavy metals than Brassicaceae, and they deal with Cd, Ni and Pb, and work even in mixed heavy metals like diesel ...

15 Factors Affecting Durability of Concrete A durable concrete is defined as one that performs satisfactorily under the expected exposure conditions for the specified lifespan of the structure. Understanding the various factors influencing  concrete durability   is essential for ensuring the long-term integrity of constructions. Below, we delve into the comprehensive array of factors that impact the durability of concrete: Factors Affecting Durability of Concrete. 1. Cement Content 2. Aggregate Quality 3. Water Quality 4. Concrete Compaction 5. Curing Period 6. Permeability 7. Moisture 8. Temperature 9. Abrasion 10. Carbonation 11. Wetting and Drying Cycles 12. Freezing and Thawing 13. Alkali-Aggregate Reaction 14. Sulfate Attack 15. Organic Acids 1. Cement Content The quantity of cement in the concrete mix is a fundamental factor influencing its durability. Insufficient cement content results in a reduced water-cement ratio, compromising workability and strength. Conversely, ...

SOAK PIT A soak pit, also known as a soakaway or leach pit, is a covered, porous-walled chamber that allows water to slowly soak into the ground. Need for Soak Pit The water coming out from a primary treatment chamber is not pure.  The primary treatment unit can be a septic tank, a biogas settler, anaerobic baffled reactor, twin-pits etc.  The effluent water coming out of these units are called greywater, which must be subjected to a partial treatment before letting it into the ground soil.  For this partial treatment, most of the wastewater management system needs a soak pit. There is no intention to reuse the wastewater that is coming from the primary treatment unit. But the partial treatment of effluent water through a soak pit is a safer way of discharging the water into the environment. Function of Soak Pit The greywater passing through the soak pit is subjected to filtration.  This results in the settlement of smaller particles of effluents at the bottom of the...