Wastewater Management

Step 1: Understanding the Concept:
Decentralized Wastewater Treatment Systems (DEWATS) are small-scale, locally-based systems designed to treat wastewater close to the source. The question asks for their key characteristics.

Step 3: Detailed Explanation:
DEWATS are characterized by several features that make them suitable for communities, small industries, or institutions where large centralized systems are not feasible. $%5Cbegin%7Barray%7D%7Brl%7D%20%5Cbullet%20%26%20%5Ctext%7B(A)%20Low%20primary%20investment%3A%20Compared%20to%20large%2C%20centralized%20sewage%20treatment%20plants%2C%20DEWATS%20typically%20have%20lower%20capital%20costs.%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B(B)%20Easy%20to%20operate%20and%20maintenance%3A%20They%20are%20designed%20to%20be%20simple%2C%20often%20using%20gravity%20flow%20and%20natural%20processes%2C%20which%20reduces%20the%20need%20for%20complex%20machinery%2C%20electricity%2C%20and%20skilled%20operators%2C%20making%20them%20easy%20to%20maintain.%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B(C)%20Baffled%20filter%20reactor%20filled%20with%20stone%20for%20filtration%3A%20This%20is%20a%20common%20component%20in%20DEWATS.%20The%20baffled%20reactor%20is%20an%20anaerobic%20treatment%20stage%20where%20wastewater%20flows%20up%20and%20down%20through%20baffles%2C%20and%20the%20attached%20growth%20on%20filter%20material%20(like%20stones%20or%20gravel)%20helps%20in%20treating%20the%20wastewater.%7D%20%5C%5C%20%5Cbullet%20%26%20%5Ctext%7B(D)%20First%20three%20chambers%20for%20sedimentation%20of%20sludge%3A%20A%20typical%20DEWATS%20plant%20starts%20with%20a%20primary%20treatment%20phase%2C%20often%20a%20settler%20or%20septic%20tank%20with%20multiple%20chambers%2C%20where%20solids%20(sludge)%20settle%20out%20through%20sedimentation.%7D%20%5C%5C%20%5Cend%7Barray%7D$ All four statements accurately describe common features and advantages of DEWATS.

Step 4: Final Answer:
All the given statements (A), (B), (C), and (D) are characteristics of a DEWAT system.

High-Yield Trend

Chapter Questions
1 MCQs

Official Solution

Wastewater Management

High-Yield Trend

Chapter Questions 1 MCQs

Official Solution

Chapter Questions
1 MCQs