The milk-processing plant of Mother Dairy, New Delhi generates
nearly 0.7 million liters per day of wastewater from various
processes involved in the production of homogenized, pasteurized
toned milk. The raw effluents from milk processing have high
levels of oil and grease, suspended solids (SS), bio-chemical oxygen
demand (BOD), chemical oxygen demand (COD), nutrients
(N, P and K), and sodium salts used in washing the plant. The
domestic sewage from the staff quarters is mixed with this wastewater
before diversion to the effluent treatment plant (ETP) located
within the premises. The ETP employs the activated sludge process
(ASP) for secondary treatment. The secondary treated wastewater
from ETP is carried through a pipe for storage in a tank for reuse in
gardening