PACKAGE SEWAGE TREATMENT PLANT (GNOPRESS-STP)

The select of package treatment system offer the user a pre-engineered and pre-fabricated method of treating sewage water with aerobic process. This modular approach to the treatment of sewage water provides the user with compact, easy to operate, and cost effective price unit. The package treatment system has exceptional track record as an efficient method of sewage treatment. These high rate treatment plants can require a fraction of space needed by other types of system.

Depending on capacity and the nature of sewage to be treated, our Package treatment system utilizes various treatment systems such as Extended Aeration (EA), Aerobic Moving Biocarriers Reactor (AMBR), Intermittent Aeration Activated Sludge (IAAS), and Submerged Bio Filter (SBF) to achieve both carbonaceous BOD/COD and nutrient removal to suitable level for discharge.

The system also utilizes a multi-step treatment process to achieve the desired final discharge requirement. Those steps consist of: Screening, Oil & Grease Removal, Biological reactor (aerobic 0r anoxic/aerobic), Clarification, Sludge recirculation, and optional pH adjustment, disinfections and Filtration.

Pre-engineered modular components such as diffused air blower, ventury aerator, biological reactor, clarifier, pH adjustment system, disinfections and, filtration system allow for the package to be sized specifically for the consumer application. They can be designed to handle a variety of influent flow rates, organic loading and nutrient loading, as well as meet a myriad of mandated discharge parameters.

EFFICIENT MULTI-STEP TREATMENT PROCESS
The influent wastewater enters the package plant by passing through bar screen and Oil Trap for gross solid and oil/grease removal. This step provides for the mechanical reduction of solids prior to biological reactor. Once the wastewater has entered the biological reactor the untreated wastewater flows is mixed with an active air agitated biomass (either in suspension or attached on specially design bio film carrier elements).

Blowers, Ventury aerator or other means of aeration equipment provides air both for agitation and oxygen supply required by biochemical process inside biological reactor. Those equipment might be operated in continuous operation or intermittent operation (such in IAAS) to satisfy Carbonaceous oxygen demand, Nitrification or denitrification requirements therefore the biological reactor could be adapted to organic carbon removal (COD/BOD) reduction and Nitrogen Removal (Ammonia, Nitrate & Nitrite reduction) which contribute the most of undesired pollutants in sewage and wastewater.

After Aeration, the wastewater flows to the clarifier, which typically has a sludge hopper in the bottom configuration. The clarifier is designed to provide a high rate clarification with help from state of the art tube settler technology. This kind of clarifier requires much smaller space then conventional ones in the ratio of 1:5, yet it produces more clear effluent in the same time. The contribution of these two latest technology, produce highly reliable and compact treatment system covering widespread flow variation and loading.

Airlift pump with adjustable pumping capacities are used to return settled solids from the bottom of clarifier back to biological reactor to maintain the maximum efficiency of biological process.

The treated water flows from the clarifier to a tablet chlorinator and undergoes disinfections process. Tertiary filtration may also be used where high quality effluent is required.

In the case when nitrogen concentration in wastewater is high and the Nitrogen effluent standard is strict, a Modified Ludzack Ettinger Process (a biological Nutrient Removal Process) could be adapted to the package. This process assures less than 15 g/liter effluents TKN that is half of 30 mg/liter TKN in most government standard.

ADVANTAGE
•Prefabricated structures lower cost
•Easily transported to customer’s site
•Design allows quick turnaround for installation
•Modular design for easy installation and relocation
•Simple operation/low man power requirement
•Effective aerobic operational principle
•User friendly-low operational maintenance
•Regulatory compliant
•Long service life
•Custom design/application specific system
•Upgradeable flow capacity or loading
•Easy to integrate with other process

TYPICAL APPLICATION
•Small Scale Land development/housing subdivision
•Hotels and apartments
•Laundry wastewater
•School & Recreational areas
•Hospitals and medical clinics
•Low Flow/High Strength or High flow/Low Strength wastewater
•Low to medium strength industrial wastewater

OPTIONAL SYSTEM
•pH adjustment & control
•Dissolved Oxygen Control
•Chlorine control
•Sludge management equipment
•Filtration System
•Fully automated system
•Special Process (Nitrogen & phosphorous removal, etc)
•Optional material of construction (Concrete, Stainless steel and FRP)

EFFLUENT COMPLIANT
Based on 300 mg/liter influent BOD5 and 30 mg/liter influent TKN
•COD : < 100 mg/l
•BOD : < 50 mg/l
•TSS : < 50 mg/l
•Ammonia : < 5 mg/l
•Nitrate : < 10 mg/l
•Nitrite : < 1 mg/l

SYSTEM CAPACITY
These enlisted capacities are also based on 200-mg/liter influent BOD5 (higher BOD5 value will decreases system capacity and vise versa).
•Gnopres-STP 0105 (1 - 5 m3/day)
•Gnopres-STP 1015 (10 - 15 m3/day)
•Gnopres-STP 2030 (20 - 30 m3/day)
•Gnopres-STP 3550 (35 - 50 m3/day)