Huayin Runchuang Environmental Protection Washing Wastewater Treatment Plant

The design scope of Huayin Washing Factory includes the entire treatment process design of the sewage treatment project, including direct engineering such as equipment selection and installation, as well as indirect engineering such as design, commissioning, and training of this project; But it does not include auxiliary projects such as civil engineering construction, external power supply, water diversion, drainage and greening, roads, etc., nor does it temporarily consider auxiliary projects such as communication, transportation, power supply and distribution, heating, etc. for sewage treatment stations.

Process Selection

This process adopts a treatment process with biochemical treatment as the core, designed asGrille+regulating tank+air flotation equipment+flocculation sedimentation+A/O+Quartz sand filter tank+disinfection processThe process is mature and reliable, with simple operation and low investment and maintenance costs.

Process Flow Diagram

a/o process

The A/O process uses activated sludge as a biological carrier and achieves oxygenation of wastewater through the action of fan oxygen supply and aeration. Mechanical agitation is installed in tank A, and the reflux liquid from tank O flows back to tank A. Denitrification reaction is carried out in tank A, reducing most of the nitrate nitrogen to nitrogen gas, and the nitrogen gas overflows from the wastewater through agitation, achieving the goal of removing ammonia nitrogen; The effluent from tank A flows to tank O, which is equipped with blast aeration to remove most organic pollutants and convert most of the ammonia nitrogen in the influent into nitrate nitrogen; The concentration of activated sludge in the O-stage tank can be adjusted according to the needs of the wastewater, and the organic matter in the wastewater can be adsorbed, oxidized, and decomposed through the microbial flocs in the activated sludge; High removal rate of organic matter and ammonia nitrogen. However, due to the lack of an independent sludge return system, it is not possible to cultivate sludge with * function, and the degradation rate of difficult to degrade substances is relatively low; At the same time, in order to improve denitrification efficiency, it is necessary to increase the internal circulation ratio, which increases operating costs. In addition, the internal circulation liquid comes from the aeration tank and contains a certain amount of DO, which makes it difficult to maintain the ideal anoxic state in section A, affecting the denitrification effect and making it difficult to achieve a denitrification rate of 90%.

3. SBR method

SBR method is a relatively advanced activated sludge treatment method developed in recent years. This treatment process integrates an aeration tank and a sedimentation tank, with continuous water inflow, intermittent aeration, and sewage sedimentation and removal of supernatant when the gas is stopped, forming a cycle that repeats itself. The SBR method does not have sedimentation tanks or sludge return equipment, but it operates intermittently and requires multiple treatment units. The inflow and aeration are switched between each other, making the control more complex. In order to ensure the overflow rate, the SBR method requires high manufacturing standards for the decanter equipment, and must strive for excellence during production, otherwise it is easy to cause the final effluent water quality to not meet the standards.

4. Contact oxidation method

The biological contact oxidation method is a traditional biochemical treatment method, in which the biological filler is a semi soft filler on a fixed bed. Using semi soft fillers as attachment carriers for microorganisms. The organisms are evenly distributed on the biological packing, which avoids the phenomenon of uneven distribution of microorganisms. At the same time, the organisms adhere to the surface of the packing and do not flow with water. Due to the strong agitation of the rising airflow, the biofilm is constantly renewed, thereby improving the purification effect. The contact oxidation method has the advantages of short treatment time, small volume, good purification effect, good and stable effluent quality, no need for sludge reflux or expansion, and low power consumption. Its main characteristics are:

High volumetric load and strong resistance to impact load;

Having the advantages of membrane method, with less residual sludge;

It has the advantages of activated sludge process, supplemented by mechanical equipment for oxygen supply, high biological activity, and short sludge age;

Can decompose substances that are difficult to decompose by other biological treatments;

Easy to manage, eliminating drawbacks such as sludge flotation and expansion.

In summary, the biological treatment of this project is planned to adopt the "hydrolysis acidification+contact oxidation method".

5. Air flotation equipment

Air flotation equipment is used to suspend suspended solidsA water treatment equipment that attaches bubbles and rises to the water surface, thereby separating water and suspended solids. It also makes waterSurfactantIt is attached to the bubble surface and floats to separate from water, which is called foamAir flotation methodThe equipment used in the air flotation method, including those used to complete the separation processfloatation tankAnd auxiliary equipment that generates bubbles. In water treatment, air flotation method can be usedPrecipitation methodIn situations where it is not suitable, it can be used to separate suspended solids with a specific gravity close to water and difficult to precipitate, such as oils, fibers, algae, etc. It can also be used for concentrationActivated sludge.

The operation of air flotation equipment mainly relies on the hydrophilic and hydrophobic surfaces of suspended solids. hydrophobicThe surface of particles is prone to attaching bubbles, so the air flotation method can be used.Hydrophilic particlesAfter being treated with appropriate chemicals, it can become hydrophobic. The air flotation method in water treatment commonly uses coagulants to agglomerate colloidal particles intoFloc bodyThe floc has a network structure, which makes it easy to trap bubbles, thereby improvingAir flotationEfficiency. Furthermore, if there is any in the waterSurfactants (such as detergents) can form foam and also attach suspended particles to rise together.

The sewage is collected and enters the grid channel, where the grid intercepts larger floating and suspended solids in the water and then enters the regulating tank (pre aeration is adopted in the regulating tank). After homogenizing the water quality, it is pumped into the air flotation tankSolid-liquid separationAfter sedimentation, the effluent enters the anaerobic tank for anaerobic treatment, which significantly reduces the BOD in the wastewater under the decomposition of anaerobic bacteria₅It flows into the hydrolysis and acidification tank of section A, where the sewage undergoes hydrolysis and acidification, decomposing difficult to biodegrade large molecular organic matter into easily biodegradable small molecular organic matter. The effluent from the acidification tank in section A flows into the contact oxidation tank in section O. Due to the previous hydrolysis and acidification of the sewage, the biodegradability of the sewage is greatly improved, and a large number of microorganisms are used to remove organic matter from the sewage. At the same time, aerobic microorganisms are used to carry out nitrification reactions in the wastewater, converting ammonia nitrogen (NH3-N) into nitrite (NO2-) and nitrate (NO3-). The effluent flows into the MBR tank for membrane filtration and separation before meeting the discharge standards.

Engineering investment estimation

The civil engineering part shall be provided with design drawings by the design party, and the construction party shall carry out construction according to the drawings. The cost of civil engineering is not included in this investment quotation.

Electrical and Automatic Control

1. Because the total installed load of the sewage treatment equipment is not high, there is no need to set up a separate substation. It can be directly connected from the substation in the project area. The electrical part of this plan only considers electrical control from the distribution room.

2. The programmable controller used centrally controls the entire process flow, and the start and stop of the water pump are controlled by the water level controller. At the same time, the switching between the water pump and the fan can be automatically completed. At the same time, the system is equipped with overload protection and power-off protection functions.

Environmental protection, occupational safety and health

The sewage treatment project itself is an environmental and energy-saving project, which has important practical significance for resource recovery, comprehensive utilization, water conservation, pollution reduction, and protection of nearby groundwater and river water quality. However, the project itself also has certain sources of pollution, and measures must be taken to eliminate them.

Our company guarantees that the goods it provides are brand new, unused, using Jia materials and Yiliu technology, and meet the quality, specifications, and performance requirements specified in the contract in all aspects. And ensure that the goods are correctly installed, operated and maintained, and operate well during the service life of the goods. During the specified quality assurance period, we are responsible for any defects or malfunctions caused by design, process, or material defects, and the costs shall be borne by us. Unless otherwise specified in the contract, in the event of the above situation, if we fail to remedy the defect within thirty days after receiving notice from the buyer, the user may take necessary remedial measures, but the risks and costs will be borne by us. The user reserves the right to claim compensation for any losses caused.

Transportation

Notify the owner by phone or fax one day before the shipment of each batch of equipment for automobile transportation.

The notice specifies: consignee, shipper, equipment number, shipment date, destination, name of goods and purchase order number, total volume of goods, total number of packages, and other information.

Installation service

After receiving the buyer's request for our company to send technical personnel to the site for installation, testing, and debugging, our technical personnel will arrive within one day. During equipment installation, we will follow the detailed construction drawings approved by the user and complete them on our behalf. We are responsible for the specific installation work, and the next debugging stage can only be carried out after we confirm that the installation is correct.

Huayin Runchuang Environmental Protection Washing Wastewater Treatment Plant

The business performance of New Third Board environmental protection enterprises has significantly declined in the first half of 2019. Based on the leading index and market conditions, it is expected that the downward trend of business performance of New Third Board environmental protection enterprises in the second half of 2019 may slow down.

Overall, the economic performance of environmental protection enterprises listed on the New Third Board showed a significant decline in the first half of 2019. The scale of enterprises has shown an expansion trend compared to the same period in 2018, but has shrunk compared to the second half of 2018. The main business income and environmental protection main business income increased by 6.40% and 5.32% respectively year-on-year, and decreased by 23.71% and 23.56% respectively month on month. More than 60% of enterprises achieved positive growth in their main business income year-on-year; The overall performance of the benefits is better than the same period in 2018 but not as good as the second half of 2018. The total profit, per capita environmental protection operating income, and unit average environmental protection operating income increased by 20.20%, 3.62%, and 4.90% year-on-year, respectively, but decreased by 26.79%, 23.40%, and 23.26% month on month, respectively. Nearly 60% of enterprises achieved positive growth in total profit year-on-year; The pressure of payment collection has increased compared to the first and second half of 2018, and liquidity has decreased; The cost pressure has been reduced, and the growth of tax burden pressure has slowed down compared to the same period in 2018. It is expected that the downward trend of the economic performance of environmental protection enterprises on the New Third Board in the second half of 2019 may slow down.