4 Treatment Technologies of Fresh Market Wastewater
65
by outlet opening. The basin depth is 3.5 m with hydraulic retention time of four to
five hours and rate of aeration is 12.5 m
3 /min.
The next process is wastewater flow into membrane bioreactor basin. The set
packages of membrane bioreactor are used in this stage with hooked up to the permeate suction pipe plastic hose, and the water sucked is through the membrane in
membrane bioreactor by permeate pump. Three self-priming pumps/trains were used
for duty or standby in this stage. Next, the wastewater is re-supplied to the bottom
membrane bioreactor through diffuser located underneath the membrane bioreactor
package. The air bubble blows through membrane and loosen the dirt with drop down
which accumulates as sludge. The membrane material is high-density polyethylene
with hollow fibre type. The size of membrane bioreactor is 0.4 µm with allowable
pH range of 2–13 and optimum temperature of 13–35 °C for operating condition.
Finally, the wastewater flows to treated water basin. This basin is used to store the
wastewater before discharge into outlet drain which is used in the backwash operation. This stage was controlled by float sensor with the basin depth of 3.5 m (KLCH
2016).
Figure 4.2 shows the installation process while Fig. 4.3 shows the maintenance
process for membrane bioreactor. Sludge digesting basin is needed to store accumulated sludge in which the interval of sludge desludging depends on effluent quality.
The basin depth is 3.5 m. The sludge disposal is collected and transferred to Jinjang
Transfer Station. Washing basin is used during membrane bioreactor cleaning. The
membrane bioreactor frame is soaked into this basin. Chemical tank contains sodium
hypochlorite and oxalic acid which was supplied to the basin using chemical dosing
metering pump. The depth of washing basin is 3.5 m. The monitoring work needs to
be conducted to maintain good effluent quality by checking the control panel, data
collection and water flow rate and gauge.
The summary of influent and effluent water quality was recorded with the data
collected on 22 January 2016 as shown in Table 4.3.
Muntinlupa City Public Market in Muntinlupa City, Metro Manila, Philippines is
the largest public market in the metropolitan area with 1448 stalls and 24 h operating
per day. The sewage, grease and wastewater from washing the meat and fishes that
discharge to a septic tank produce odour that is uncomfortable to the customers.
The partially treated fresh market wastewater then flows to the Laguna Lake which
Preparation of membrane bioreactor package
Put membrane bioreactor into the frame
Membrane bioreactor packege slowly submerge into waster
Installation the header to supply air and transfer water
Membrane bioreactor package finish installed
Preparation of membrane bioreactor package
Put membrane bioreactor into the frame
Membrane bioreactor packege slowly submerge into waster
Installation the header to supply air and transfer water
Membrane bioreactor package finish installed
Fig. 4.2 Installation process of membrane bioreactor
65
by outlet opening. The basin depth is 3.5 m with hydraulic retention time of four to
five hours and rate of aeration is 12.5 m
3 /min.
The next process is wastewater flow into membrane bioreactor basin. The set
packages of membrane bioreactor are used in this stage with hooked up to the permeate suction pipe plastic hose, and the water sucked is through the membrane in
membrane bioreactor by permeate pump. Three self-priming pumps/trains were used
for duty or standby in this stage. Next, the wastewater is re-supplied to the bottom
membrane bioreactor through diffuser located underneath the membrane bioreactor
package. The air bubble blows through membrane and loosen the dirt with drop down
which accumulates as sludge. The membrane material is high-density polyethylene
with hollow fibre type. The size of membrane bioreactor is 0.4 µm with allowable
pH range of 2–13 and optimum temperature of 13–35 °C for operating condition.
Finally, the wastewater flows to treated water basin. This basin is used to store the
wastewater before discharge into outlet drain which is used in the backwash operation. This stage was controlled by float sensor with the basin depth of 3.5 m (KLCH
2016).
Figure 4.2 shows the installation process while Fig. 4.3 shows the maintenance
process for membrane bioreactor. Sludge digesting basin is needed to store accumulated sludge in which the interval of sludge desludging depends on effluent quality.
The basin depth is 3.5 m. The sludge disposal is collected and transferred to Jinjang
Transfer Station. Washing basin is used during membrane bioreactor cleaning. The
membrane bioreactor frame is soaked into this basin. Chemical tank contains sodium
hypochlorite and oxalic acid which was supplied to the basin using chemical dosing
metering pump. The depth of washing basin is 3.5 m. The monitoring work needs to
be conducted to maintain good effluent quality by checking the control panel, data
collection and water flow rate and gauge.
The summary of influent and effluent water quality was recorded with the data
collected on 22 January 2016 as shown in Table 4.3.
Muntinlupa City Public Market in Muntinlupa City, Metro Manila, Philippines is
the largest public market in the metropolitan area with 1448 stalls and 24 h operating
per day. The sewage, grease and wastewater from washing the meat and fishes that
discharge to a septic tank produce odour that is uncomfortable to the customers.
The partially treated fresh market wastewater then flows to the Laguna Lake which
Preparation of membrane bioreactor package
Put membrane bioreactor into the frame
Membrane bioreactor packege slowly submerge into waster
Installation the header to supply air and transfer water
Membrane bioreactor package finish installed
Preparation of membrane bioreactor package
Put membrane bioreactor into the frame
Membrane bioreactor packege slowly submerge into waster
Installation the header to supply air and transfer water
Membrane bioreactor package finish installed
Fig. 4.2 Installation process of membrane bioreactor