Wastewater Treatment

Integrated Wastewater Treatment Equipment Detailed Description

I. Overview

The entire system consists of nine components, controlled by PLC, thereby achieving automated processing and alleviating the normal handling during peak and low water flow periods. Features of the integrated wastewater treatment equipment:

1. The complete equipment can be buried underground, occupying no land area; it can also be landscaped above.

High purity level, the entire system produces less sludge.

High level of automation, low energy consumption, easy management, and fewer staff required for management.

Low noise and minimal odor, with minimal impact on the surrounding environment.

II. Process Flow of Integrated Equipment:

Section 3: Process of domestic wastewater treatment and the role of each region:

Wastewater from domestic life is a low-concentration organic wastewater containing nitrogen, phosphorus, oil, impurities, and other substances. It has good biodegradability and is rich in various nutrients. Additionally, the likelihood of heavy metal ion contamination is relatively low. The pH level is around 6-9, which is approximately neutral. Therefore, the A/A/O process can simultaneously remove organic matter. The denitrification process, excessive phosphorus removal, and other functional denitrification are combined with the aerobic pool to complete the phosphorus removal function.

Characteristics of A/A/O process:

1. A combination of anaerobic, anoxic, and aerobic conditions, along with diverse microbial communities, effectively removes organic matter, nitrogen, and phosphorus.

2. The denitrification process is straightforward, with a total hydraulic retention time less than that of similar other processes.

Under alternating anaerobic-anoxic-aerobic operation conditions, filamentous bacteria will not propagate in large quantities, and the SVI is generally less than 100.

IV. Functions of Accessories for Each Equipment:

1. The grate well serves to isolate suspended solids and impurities from wastewater, to prevent affecting the subsequent treatment of the equipment.

2. The function of the regulating pond: Due to the characteristics of domestic water usage, the discharge of water is not evenly distributed over time, with peak periods generally occurring in the morning, afternoon, and evening. The regulating pond can balance the uneven supply of water, ensuring the subsequent treatment processes run smoothly. A water level controller is set up in this pond, enabling effective automated control.

3. Anaerobic Pond Function: Wastewater flows into the anaerobic pond, where it is thoroughly mixed with anaerobic bacteria by the action of a mixer. The anaerobic pond decomposes microorganisms and organic matter in the wastewater, producing substances like CO2 and methane.

4. The function of the Anoxic Pond: The water from the Anaerobic Pond flows into the Anoxic Pond for further decomposition of organic matter, and the removal of ammonia, nitrogen, and phosphorus from the wastewater. The clarified liquid at the top of the Anoxic Pond is then transferred to the Contact Oxidation Pond, while sludge is returned through the recycle pipe to the Anaerobic Pond, thereby increasing the concentration and enhancing the treatment efficiency of the Anaerobic Pond. Once the concentration in the Anaerobic Pond reaches saturation, close the recycle valve and open the valve leading to the Sludge Concentration Pond, allowing sludge to flow directly into the Sludge Concentration Pond.

5. The function of the Contact Oxidation Tank: After the wastewater from the anaerobic tank flows into the contact oxidation tank and fully contacts with the oxidizing bacteria (three-dimensional elastic media) in the tank, the wastewater is decomposed into CO2 and H2O. The CO2 in the water is then expelled through the action of the blower. The sludge consists of the remains of dead bacteria.

6. The second sedimentation tank allows for secondary sedimentation of the water in the contact oxidation tank. The clarified water flows into the disinfection tank, while the sludge is pumped to the sludge thickening tank via a sludge pump. The water in the disinfection tank is treated with a chlorine dioxide generator and discharged after meeting the standards. The supernatant of the sludge thickening tank is returned to the regulating tank through a recirculation pipe, while the sludge is pumped to a plate and frame press filter for treatment. The filtered water is then returned to the regulating tank via the recirculation pipe.

V. Application Scope of Integrated Wastewater Treatment Equipment

Integrated wastewater treatment equipment is suitable for residential communities, villages, townships, office buildings, shopping malls, hotels, restaurants, schools, highways, railways, factories, mines, tourist attractions, and other similar small and medium-sized industrial organic wastewater from activities like slaughtering and aquatic product processing. The wastewater treated by this equipment meets the national comprehensive discharge standards for wastewater treatment.