Package Wastewater Treatment Plant:Eveything You Should Know

Very few people are aware of where their domestic wastewater ends up. In residential and commercial complexes with well-established sewer lines, the effluent often ends up being treated in a municipal sewage treatment plant. However, not all regions have elaborate sewer systems and wastewater from surrounding homes and businesses may end up discarded in water bodies. Tougher regulations have been enacted to govern effluent quality and disposal.

In the underlying article, we will be looking at wastewater package plants intelligently designed to treat wastewater.

Figure 1 Package treatment plant.

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1. What is a Package Wastewater Treatment Plant?

A package wastewater treatment plant is a compact wastewater treatment system pre-assembled or enclosed in a self-contained unit. All components are pre-assembled at the point of manufacturing. Package plants are technically plug-and-play systems. They are easily and quickly set up since they are already pre-assembled. Typical package wastewater treatment plants consist of primary and secondary clarifiers, sludge storage, control panels, and post-treatment units.

These plants often incorporate varying wastewater treatment technologies. For instance, physical filtration, membrane filtration, biological treatment, and ultraviolet disinfection. Irrespective of the treatment processes employed, package sewage treatment plants treat wastewater in three phases, preliminary treatment, primary treatment, and post-treatment. Most package wastewater treatment plants are assembled on conventional metal containers measuring 40 ft.

They are often deployed to treat domestic wastewater but they can be customized to treat industrial effluent. Modern package wastewater treatment plants mostly utilize membrane bioreactor treatment. This is a shift away from activated sludge treatment, which was the primary wastewater treatment process in the past.  NEWater’s package wastewater treatment plants are state-of-the-art systems that are compact, easy to use, and pretty cost-efficient.

2. What Are the Chief Benefits of Package Wastewater Treatment Plants?

Package treatment plants stand out from modular treatment plants thanks to their compact and pre-engineered setup. In the recent past, their stock has risen and this has been brought about by their multifaceted advantages. Underneath, we are going to briefly discuss the outstanding advantages of package sewage treatment plants.

●      Regulatory compliant.

To curb environmental degradation, respective local authorities have come up with stringent regulations designed to govern wastewater disposal. Package sewage treatment plants, and get rid of objectionable impurities in your wastewater to generate high-grade effluent in compliance with discharge regulations.

●      Pre-engineered.

Package treatment plants are pre-engineered and pre-assembled at the point of manufacturing. This makes them compact, easy to install, and economical. They are essentially turnkey or plug-and-play wastewater treatment plants.

●      User friendly.

They are safe and easy to operate. Automatic package sewage treatment plants contain PLC control units, which automate virtually all functions. Ordinarily, they are delivered with user manuals, which make their operation straightforward.

●      Mobile.

Packaging a comprehensive wastewater treatment system in a container of self-contained units makes transportation easy. These units are easy and economical to transport from the manufacturing facility to their respective location.

Figure 2 Skid-mounted treatment plant.

●      Cost-efficient.

Over time, the investment cost of package wastewater treatment plants has shrunk tremendously. These systems hardly necessitate professional installation hence minimal installation fees are incurred. In addition, their operational and maintenance costs are quite low.

●      Extensive service life.

Package treatment plants can last up to 50 years. Most of the high-value components used are also durable and can last up to 20 years. However, it is important to properly maintain the plant to mitigate premature damage.

3. How Do Package Wastewater Treatment Plants Function?

Effluent treatment is primarily a multi-stage process involving over 6 stages. These processes are mainly divided into three; pretreatment, primary treatment, and post-treatment. The treatment process is mainly undertaken using varying mechanisms since wastewater often consists of different impurities. Here is a brief elaboration of the entire wastewater treatment process.

●      Screening.

First, the wastewater is forced to penetrate through screening devices. These screeners eradicate large solids such as plastics, rags, glass pieces, and wood fragments. The extracted solids are thoroughly washed before being dumped in landfills.

●      Grit extraction.

Grit extraction is often undertaken to eradicate fine impurities like gravel, grit, and sand. The extracted sand and grit are disposed of in landfills.

●      Primary clarification.

The primary clarification is also referred to as primary settling. This process is often undertaken in clarifiers, which are essentially circular vessels. Primary clarification removes impurities that settle at the base of the primary clarifier (primary sludge). The wastewater, on the contrary, exits the clarifier at the top. Chemical regenerants can also be injected at this stage to eradicate phosphorus.

●      Aeration.

Aeration simply adds oxygen into the wastewater to catalyze the growth of microorganisms, particularly bacteria. Organic compounds are broken down by bacteria into water, cell tissues, and nitrogen. Most of the wastewater treatment happens during this stage.

●      Secondary settling.

Also referred to as secondary clarification, secondary settling utilizes secondary clarifiers to settle down impurities and consequently extract them from the wastewater. The effluent exiting the secondary clarifiers is approximately 90% treated. The activated sludge collected at the clarifier’s bottom is then re-pumped into the aeration tank.

●      Filtration.

The effluent from the secondary clarifiers is subsequently subjected to 10-micron filters. This process simply refines the effluent’s quality by extracting any remaining suspended solids.

●      Sterilization.

Wastewater treatment is often concluded by disinfecting it using UV water sterilizers or chlorination. These disinfection processes eliminate bacteria present in the effluent thereby ensuring the microbial limits are adhered to. Click on the underlying link to watch a video demonstrating the treatment stages undertaken by package wastewater treatment plants.


4. What Are the Different Types of Package Treatment Plants?

Thanks to modern technologies, we now have different types of package wastewater treatment plants. The dissimilar plants suit best different wastewater treatment applications. Underneath, we are going to look at the three primary types of package treatment plants, their working principles, applicability, and benefits.

●      Package sequencing batch reactor plants.

Sequencing batch reactor plants are wastewater treatment systems that treat wastewater in batches using similar reactor tanks. These plants are quite similar to activated sludge plants except for their distinct configuration. They are mostly ideal for applications with limited land such as schools, homes, and small industries. Package SBR plants are revered because they are operationally flexible can remove phosphorus, and perform denitrification.

●      Package extended aeration plants.

The package extended aeration plants are chiefly used in apartment complexes, small municipalities, and petrochemical industries among others. They essentially treat wastewater by degrading organic compounds using aerated microorganisms such as bacteria. The process of supplying oxygen to the wastewater is referred to as aeration. 90% of the wastewater treatment typically takes place in the aeration tank/ chamber. After aeration, the effluent is driven into a settling chamber, which eliminates impurities through sedimentation.

●      Package membrane bioreactor (MBR) plants.

Package membrane bioreactor plants are self-contained wastewater treatment systems that incorporate biological treatment and membrane filtration. MBR plants utilize biological treatment processes such as activated sludge treatment to break down or degrade organic impurities using bacteria. They also employ membrane filtration, particularly ultrafiltration and microfiltration to filter out the suspended matter. Advantages of using package MBR plants include;

  • High-level discharge/ effluent.
  • Shorter hydraulic retention time.
  • They produce smaller quantities of sludge.
  • Longer solid retention time.

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5. Which Factors Should I Consider Before Purchasing a Package Wastewater Treatment Plant?

With stringent regulations on wastewater quality and disposal methods already in place, it is paramount to ensure that you purchase the right treatment system. Presently, we have a myriad of options and although this is very impressive, it can also be puzzling for buyers. Underneath, we will be looking at some of the questions you need to ask yourself before buying a package treatment system.

●      What is the composition and concentration of your wastewater?

The impurities found in domestic wastewater cannot be compared to the contaminants present in industrial effluent. First, determine the quality of your wastewater and the contaminants present. This will help establish the range of equipment you need to effectively treat your wastewater.

Figure 4 Package membrane bioreactor (MBR) plant.

●      What are the existing discharge regulations?

Different localities are governed by different discharge regulations. Consult the relevant authorities to understand the quality of effluent your package sewage treatment plant needs to discharge. This will help avoid legal battles or hefty fines imposed on lawbreakers.

●      What quality of effluent do you need?

If you intend to reuse or recycle the effluent in applications such as irrigation, ensure that your preferred plant can generate high-quality effluent. However, if you intend to discard the treated effluent, you can opt for a basic package wastewater treatment plant as long as the generated effluent meets the applicable discharge regulations.

●      How much does it cost?

For most prospective buyers, this is often the first question. Understanding the expected investment costs as well as the operational costs is imperative. Get quotations of the plant and research the expected operational and maintenance costs. You can consult different manufacturers to gain an in-depth understanding of the projected investment and operational costs.

6. What Are the Main Components of Standard Package Treatment Plants?

The different types of package wastewater treatment plants we have discussed earlier, tend to have dissimilar components. However, most of them share similar key components. Below, we are going to discuss the primary components found in a basic package treatment plant.

●      Screening equipment.

Screening equipment primarily extracts large constituents such as wood fragments, plastics, and debris found in wastewater. Virtually all package treatment plants come with screening equipment, which is utilized in preliminary treatment.

●      Oil separators.

Oil separators are components used to filter out oils from wastewater. They are also employed during pretreatment.

●      Aeration chamber.

The aeration chamber is a vessel whereby oxygen is supplied to the wastewater to propagate the growth of bacteria. This consequently initiates the bacterial degradation of organic compounds.

●      Clarifiers.

Clarifiers are circular settling tanks used to eliminate pollutants through sedimentation. Typical package wastewater treatment plants consist of two clarifiers; the primary clarifiers and the secondary clarifiers.

●      Filters.

Typically, 10-micron filters are deployed to refine the quality of effluent from the second clarifiers. These filters eliminate the remaining suspended solids.

●      Disinfection system.

The most prominently used water disinfectants are UV water sterilizers and chlorine dosing systems. These systems simply get rid of bacteria and other harmful microorganisms to ensure the microbial limit is not surpassed.

Figure 5 Components of a package treatment plant.

7. Which Designs Are Used to Manufacture Package Wastewater Treatment Plants?

Package treatment plants are characterized by a self-contained structure. The self-sufficient structure used can be customized in shape and size to match the client’s taste. However, most package treatment systems employ two primary designs; skid-mounted and containerized.

●      Skid-mounted treatment plants.

Skid-mounted treatment plants are treatment systems enclosed by metal frames or installed on metal pellets. The metallic skid mount makes the treatment plant portable and offers protection to components of the system. The skid mount’s size and shape can be customized to gratify the client’s specifications.

●      Containerized treatment plants.

Containerized treatment plants are the most popular package wastewater treatment plants. Essentially, all components are assembled in a self-contained container. Typical 40 ft containers made of metal are used. For convenience, we equip our containerized treatment systems with adequate lighting and air conditioning systems.

8. Package Wastewater Treatment Plant Applications.

Package wastewater treatment plant has a compact and lightweight design, making it suitable for use in residential environments and a variety of businesses such as:

  • Residential and commercial construction;
  • Mining industry;
  • Construction sites;
  • Industrial wastewater treatment;
  • Municipal sewage treatment plant;
  • Rural sewage treatment.

Utilize the powerful wastewater treatment capabilities of modern packaged treatment plants to recover excess pollutants from the water at the final stage of the water treatment process. This results in the production of pollution-free water.

9. Why NEWater Package Wastewater Treatment Plant?

NEWater supplies a comprehensive range of complete processing equipment to hundreds of satisfied customers worldwide. It is equipped with advanced wastewater treatment capabilities while remaining environmentally friendly and cost-effective. Our packaged treatment facilities are simple to operate and energy efficient. In addition, maintenance costs are low, ensuring the longevity of the equipment.

Features of NEWater Package Wastewater Treatment Plant:

  • Flexible solutions for a wide range of business needs.
  • Hassle-free purchasing and transaction process.
  • A wide range of water treatment processes.
  • Custom design work done by experts.
  • Multiple international certifications.

NEWater is a one-stop solution tailored to your wastewater treatment specifications, requiring less effort to install the unit. The equipment occupies a small area, is simple to maintain, is easy to operate, and has low operating costs. It is suitable for sewage treatment plants of various sizes. We can provide you with a package sewage treatment plant, wastewater package plant, and portable wastewater treatment system. Contact us now!

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