In municipal water treatment, we have innovative and patented new technologies like precoat filtration as well classic treatment technologies and processes. SafBon has the capability to provide a full range of municipal and industrial water treatment systems according to the specific inflow water quality characteristics and output requirements.
SafBon Water Purification Technologies
SafBon uses various technology in the treatment process, including:
Horizontal sedimentation tank;
Turbulence flocculation sedimentation tank;
Folded plate flocculation sedimentation tank;
Shallow air-flotation tank;
Horizontal flotation tank;
Mechanical accelerated clarifier;
Grid flocculation tank with ordinary rapid filter;
Double valve filter,
Variable pore filter;
Gravity type air scouring filter;
High efficiency sedimentation tank;
Integrated equipment of clarifier;
Dissolved air flotation;
Automatic sand filter.
Through SafBon’s expertise and experience, SafBon is able to provide the clients high-quality-low-cost water treatment systems with a combination of the most appropriate technologies.
High Efficiency Sedimentation Tank
SafBon’s purification system has been applied successfully in the Yangze River, Yellow River, other rivers and lakes, and mountainous areas, where sand content of water is higher. Moreover, SafBon adopts the advanced ultrafiltration (UF) technology to treat coal mine adit water which contains coal soil.
The Necessities of Dual Water Supply
In Northwest China, according to water analysis report from the ministry of water resources, more than 80% well water are in class IV and V, based on Chinese surface water quality standards. Meanwhile, 90% of the water treatment plants are still using traditional water treatment methods. They can remove only a part of physical and microbial contaminations. The chemical pollutants, such as pesticide, synthetic detergent, heavy metal and other harmful substances are remaining in the treated potable water. It is seriously harmful to people’ health.
Drinking Water Purification Process
The initial water source of the drinking water is the deep groundwater in southern Guangrao County. It is transferred to Dongying water treatment plant through a 60 km-long feed pipe and the raw water will be purified in the plant.
Firstly, in activated carbon filter, the raw water will be treated by quartz sand and activated carbon, in order to reduce the turbidity and remove smell and taste remaining in raw water. Then the ultrafiltration and nanofiltration system will treat the water profoundly. An ozone system is set up for output pit, it could enhance the disinfection and oxygenation of product water. The O3/ClO2 disinfection complex can guarantee the continuous disinfection ability in water distribution system. With the variable frequency pressurizing system and pipe network circumfluence system, the water quality will be more stable and reliable.
The Process Flow Diagram of Central City Dual Water Supply
Dual Water Supply System
Dual water supply systems separate the safe to drink water supply and the everyday water supply, while retaining the original water pipe network. About 5% of tap water will go through in depth purification treatment again to remove organic compounds, bacteria, viruses, heavy metals and excessive hardness and other harmful substances in water, while retaining the beneficial minerals and trace elements, so as to achieve the China’s "Drinking Water Quality Standards" and is safe for consumption.
The additionally purified high-quality drinking water is sent directly to the consumers by an independent circulating high-quality pipe network, , so as to ensure the health and safety of drinking water and to meet the demand of water consumption for the various needs of the public.
Drinking Water Sites
Dual Water Supply System Feature
High quality steel tubes
Pipeline direct drinking water pipes are adopted new materials with high quality. The pipe itself does not produce secondary pollution.
Frequency conversion water supply
Direct drinking water pipe network are all closed system, and the water supply system uses frequency conversion method, the water tank is not needed. There is no secondary pollution source.
Direct drinking water system adopts system circulation method, which drinking water recycles a few times every day. There is no stagnant water segment.
Characteristic of Supplied Drinking Water
Fresh: The pure water is available at any time.
Good taste: Removing about 90% of calcium and magnesium ions, and keeping proper hardness makes the drinking water tastes good.
Reliability: Professional centralized management.
Safety: Efficiency organic pollutants removal.
The BIOBON is a multi-stage activated sludge process, which integrates biological nitrogen, phosphate and carbonate removal, final clarification and a subsequent advanced water treatment in the same basin. The biological moving aerator chains are the essential part of BIOBON process, which guarantees the sufficient and economical oxygen supply, so that an odorless activated sludge process achieves.
It replaces concrete tank with non-concrete tank with HDPE membrane (high density polyethylene impermeable membrane), which greatly decreases construction costs;
The fine air bubbles produced by undulating aerator chains remain in the water almost three times longer than with fixed aerators, oxygen transfer efficiency is thereby improved and up to 20% energy is saved.
It has high sludge content as well as longer aeration and sludge retention times, which decreases the cost of subsequent sludge dewatering.
The simple structure and easy installation make BIOBON an ideal sewage treatment method for certain kinds of municipal wastewater treatment plant (WWTP) projects.
BIOBON provides an extra excellent solution for the treatment of ammonia nitrogen, BOD, COD, TP (total phosphorus) and other pollutants in the municipal sewage. This treated wastewater can be directly reused as industrial cooling water. In China, SafBon is leading in the application of the BIOBON aeration treatment technology into the sewage and reclaimed water treatment systems.
Precoat Filtration Technology
Precoat filtration is a new technology developed by SafBon. There are mainly two types – pressure type and submerged type. Fundamentally, this technology is able to line the surfaces of filter elements by hydraulic methods with either a powdery diatomite or activated carbon. The resulting filter membrane thickness is 1.5-3.0 mm, which rejects suspended particles and other microorganisms in water. With the utilization of this precoat treatment technology, the filtered water meets the requirement of China’s "Drinking Water Health Standards" (GB 5749-2006).
Submerged Precoat Filtration Technology
The negative pressure filtration can conveniently match the existing water supply system;
The filtration rating is 1 μm; the effluent turbidity < 0.1 NTU; the bacteria removal rate > 6 Log; the COD removal rate > 50%, the chromaticity removal rate > 90%; the algae removal rate > 90 %, the filter operation time > 15 hours. The effluent quality meets the latest China’s national drinking water standards.
The precoat filter occupies 1/3 footprint of conventional filter. Besides, the precoat filtration technology requires less investment; the filter is reliable, durable, less operating costs. Thus this technology is one of the best choices in water plant upgrade process.
Less operational power consumption; the transmembrane pressure difference is less than 0.05 MPa.
The precoat filtration technology mainly can be applied in:
Drinking water treatment and drinking water advanced treatment;
The industrial wastewater in beverage industry, beer industry, etc.;
The industry that produces special wastewater, such as dye sewage and oilfield sewage;
Sewage advanced treatment.
Low Impact Development (LID) Concept
Low impact development (LID) refers adopting an ecological approach when treating water in a sustainable way. A city should be able to store and recycle the stormwater, while reducing the pollution in the initial rainwater runoff. Furthermore, the city should be flexible in adapting to environmental changes, responding to natural disasters and other incidents.
Riverside Construction of LID Project in Liupanshui, China Overview of Liupanshui China LID Project
SafBon is committed to putting the ecological environment first and during the construction of projects combines the natural views and artificial landscapes. The goal is to maximize the holding, infiltration and purification of rainwater in the city area, in the premise of city water drainage system safety.
SafBon fully takes natural precipitation, surface water and groundwater system into consideration when designing water supply, drainage and reuse system. Artificial landscapes such as walking and bicycle lanes along the river, wetland park, etc. are constructed for the comprehensive development of the cities and allow the residents to enjoy the environment.
SafBon is well-known for its effective design, rigorous construction and state-of-the-art technologies. SafBon also has professional financing and engineering teams, advanced water treatment technology teams coupled with excellent equipment, standardized management and construction in a systematic manner. They all support the SafBon’s success in LID projects.
Sewage Treatment Process
Sewage treatment can be classified as primary treatment, secondary treatment and tertiary treatment according to the extent of treatment. The suspended solids in wastewater are mainly removed in the primary treatment which usually uses physical methods. In the secondary treatment process, CODCr, BOD5, NH3-N (ammonia nitrogen), TN (total nitrogen), TP (total phosphorus) and SS (suspended solids) are substantially removed. The BOD5 removal rate is 80% ~ 90%.
The commonly used technologies in the sewage treatment process are
Adsorption Biodegradation (AB) process;
Anoxic/Oxic (A/O) process;
Anaerobic-Anoxic-Oxic (A2/O) process;
Sequencing batch reactor (SBR);
Modified sequencing batch reactor (MSBR);
Intermittent cycle extended aeration (ICEAS);
Cyclic activated sludge system (CASS);
Membrane bio-reactor (MBR);
Aerated grit tank;
Horizontal flow sedimentation tank;
Mechanical accelerated clarification tank.
The purpose of tertiary treatment is to further remove some particular pollutants, such as phosphorus and suspended solids, requires an advanced treatment and commonly uses chemical methods.
SafBon Design Principles
The following principles are followed during the design of the sewage treatment plant:
Comply with the relevant laws, regulations and standards and under the guidelines of the overall planning; coordinate the project construction and the city development; utilize local conditions and wastewater facilities to improve local environment and enhance the water quality which will result in maximizing the social, economic and environmental benefit of project.
Depending on the characteristics of the influent water quality of each project, the environmental capacity and status of the receiving waters, each wastewater treatment process has to be combined effectively after consideration of the technical and economic effects. Low energy consumption, easy operation and smaller footprint are goals which SafBon will strive to achieve.
Residual sludge produced will be handling properly to avoid secondary pollution.
Depending on the different characteristics and scale of projects, SafBon keep the principle of “financing first, excellent institutions, professional team, advanced science and technology, well-equipped, normal management , scientific construction, relationship coordination, environment protection, safe security, guarantee project period” on the construction of sewage treatment plant.