Different sanitation system including package treatment plant

1. by
Prof . V. V. Sasane (Assistant Professor)
Department of Civil Engineering
Sanjivani College of Engineering, Kopargaon, 423603
Subject: - Environmental Engineering-II
B.E. Civil
Sanjivani Rural Education Society’s
Sanjivani College of Engineering, Kopargaon, 423603.
An Autonomous Institute Affiliated to Savitribai Phule Pune University, Pune
ISO 9001-2015 Certified, Accredited by NAAC (A Grade)
UNIT-V: Onsite Sanitation Treatment System
5.2: Package Sewage Treatment Plant & Introduction to MBR, MBBR
and FMBR

2. Content
• Package sewage treatment plant
1.Activated sludge plant
2.Trickling filter
3.Rotating biological contactor
• Introduction to MBR, MBBR and FMBR

3. Package Sewage Treatment Plant
• Package sewage treatment plant is
prefabricated structure
• The package sewage treatment plant is
intended for a small installation where septic
tank effluent is treated by activated sludge
process to clean filter or by rotating biological
contactor
• It can be used for township, hotel, small and
medium size cities, educational hubs, remote
construction sites

4. Types of Package Sewage Treatment Plant
1. Activated Sludge Plant
• Raw sewage is filled into septic tank then
it is passed into an aeration tank for
aeration
• The sludge formed in aeration tank is
separated in the clarifier and some
quantity is returned to a septic or aeration
tank and remaining part of it is disposed
• The effluent from the clarifier is then
disinfected and discharged

5. Types of Package Sewage Treatment Plant
1. Trickling Filter
• Raw sewage from the septic tank is
treated and supernatant produced is
distributed over a bed of media of
trickling filter.
• The bio-film is established on the filter
media this biofilm enriched with the
microorganism carry out the petrifaction
of wastewater
• Effluent is passed through humus tank,
where settles sludge or biomass is
discharge safely and effluent is
disinfected and discharged
Septic
Tank
Trickling
Filter
Humus
Tank
Disinfectio
n
Influent
Effluent

6. Types of Package Sewage Treatment Plant
3. Rotating biological Contactor
• Raw sewage is collected into septic tank
and supernatant passes through troughs
containing rotating disc that are partially
submerged in the sewage
• A biofilm develops on the disc and slough
off as soon as it becomes thicker.
• The rotating disc exposes the biofilm or
mass to air resulting into a aeration of film
sloughed biofilm are separated from
treated wastewater in humans tank and
effluent is disinfected and discharged
Septic
Tank
Humus
Tank
Disinfection
Influent
Effluent
Contactor
https://www.youtube.com/watch?v=0M7ioLoY-HE

7. Introduction to Membrane Treatment
1. Membrane Bioreactor (MBR)
• Membrane bioreactor MBR consisting of biological reactor with
suspended biomass and solid separation by microfiltration
membrane with nominal size ranging from 0.1 to 0.4 μm
• MBR system may be used with aerobic and anaerobic
suspended growth bioreactor to separate treated wastewater
from active biomass.
• It can be used for domestic and industrial wastewater
• MBR can operate at higher MLSS concentration thereby results
in high volumetric loading, shorter hydraulic retention time,
longer SRT results in less production, operation at low DO conc.
and high quality effluent in terms of low turbidity, bacteria, TSS
and BOD and less space

8. Introduction to Membrane Treatment
• The concept of MBR consists of utilising a
bioreactor and microfiltration as a one unit
process for wastewater treatment there by
replacing the solid separation function of
secondary clarification and effluent filtration. MBR
have two basic configurations
1. Integrated bioreactor that uses membrane
immersed in bioreactor and
2. The recirculated MBR membrane are separate unit
process requiring and immediate pumping steps
https://www.youtube.com/watch?v=GC2u4qdWTJI

9. 2. Moving Bed Bioreactor (MBBR)
• MBBR Technology employees particles
polyethylene on which bacteria grows
developing a biofilm are the free moving
particles which reduce the impurities
and therefore sludge mass stabilized
sludge is removed in Tank after
settlement
• https://www.youtube.com/watch?v=H
6S0MxUfNc8

10. 3. Fluidized membrane Bioreactor (FMBR)
• FMBR consist of fluidized bed of 0.4 to 0.5 mm size
sand or activated carbon. Bed depth are in the range of
3 to 4. The wastewater is fed upward and velocities of
30-36 m/hour.
• Sand or activated carbon act as a fluidized particles
which is a support media to the microorganism and the
membrane that permits treated water to pass but not
the organism.
• The fluidized particle come into direct contact with the
membrane the membrane come membrane maybe of
different types such as hollow tube membrane, tabular
membrane or flat sheet membrane.

11. • The FMBR can be used in two different mode one in
which membrane are placed within the biological
reactor itself and the other in which membrane
filtration is carried out in separate step following the
biological treatment system.
• The advantages of this system is improved retention
of biomass, reduction in membrane clogging by
sorption and scouring action of fluidized particles in
reactor which are in direct contact with membrane.
• https://www.youtube.com/watch?v=hqxvkt-tEwA