Question

11) What is the advantage of enhanced biological phosphorus removal (EBPR) over chemical precipitation?

A) Chemical precipitation produces sludge containing arsenic.
B) EBPR removes significantly more phosphorus than chemical precipitation.
C) Significantly less sludge is produced by EBPR compared to chemical precipitation.
D) EBPR is a more stable process.

Answer 1

EBPR has the advantage of producing significantly less sludge than chemical precipitation methods used in wastewater treatment.

Step-by-step explanation:

The question asks about the advantage of enhanced biological phosphorus removal (EBPR) over chemical precipitation. The advantage is that significantly less sludge is produced by EBPR compared to chemical precipitation. During chemical precipitation, substances like calcium hydroxide react with phosphate ions to produce a precipitate which is later removed by filtration. However, this can result in large amounts of sludge that require disposal. In contrast, EBPR utilizes specific bacteria to accumulate phosphate, thereby removing it from the water with minimal sludge production.