WATER AND WASTEWATER ENGINEERING DIVISION

Management of water resources is one of the world’s growing concerns for communities and industries alike. The availability of water is taken for granted by individuals and industries alike, and the need to preserve and conserve will be extremely essential to provide a sustainable development. As one of the world’s most precious resources, treatment of water requires the most up to date technology and approaches that balance economic feasibility with environmental consciousness to manage it. With expertise & experience in the field of water treatment and management, we are one-stop solutions partner for all your water and wastewater treatment requirements.

SPG Infraprojects is owned and managed by a team of professionals with extensive local and international experience in water and wastewater treatment. Understanding the needs of the client as well as taking the time to educate the end user, we work in tandem to identify the various options available for treatment; provide preliminary designs and sizing; assist in acquiring regulatory approvals followed by installation; commissioning and providing ongoing operational support.

Throughout the project, we operate on a Single Point of Contact philosophy, whereby clients and consultants need to deal with only one professional project manager. All systems are designed to occupy a minimum footprint with the least power and operating costs.

For durable, cost effective and high quality water management systems, look no further than SPG Infraprojects, your preferred partner in water and waste treatment solutions. We offer tailor made comprehensive solutions from concept to operation, minimizing the use of energy and maximizing the efficiency of the operation for all types of water & wastewater

AREA OF EXPERTISE

DBOM

Design, Build, Operate & Maintain

SPG Infraprojects is an environmental engineering company that designs, build, install, and commission water and wastewater treatment systems.
We take time to thoroughly understand the customers’ needs and aim to help clients solve water and waste-water challenges at affordable cost, using our innovative and efficient water treatment methods.

We design service and operational program for you and, at the same time train your staff, to ensure your systems are operating at the optimal level. This would help to avoid unnecessary shutdown.

Our project schedule includes the following:

• Understanding customer requirements

• Process/technology selection

• Design

• Procurement

• Contract management and build phase

• Handover/process proving

• Staff training

STP

Sewage Treatment Plant

SPG Infraprojects have rich experience in sewage treatment industry. we have been entrusted to develop effective sewage systems to ensure safer environment with clean water. A well designed sewage system is vital to prevent sewage pollution which will have an adverse impact on the sustainability of water resources. As a part of the responsible party, we aim to design and engineer modern and efficient sewage treatment plant with low lifetime cost and low maintenance to ensure customer satisfaction.

We Design, Fabricate, Supply, Erection and Commissioning Sewage Treatment Plants (STP) for treating sewage generated by Municipality, Industry, large colonies, Hotels, Hospitals, IT Parks and commercial buildings.

Now a days the Sewage Treatment Plant (STP) became statutory requirement of all the State Pollution Control Boards, everybody, whether Hotelier or Industrialist were looking for economical, easy to install and operate compact type Sewage Treatment Plant. Since the land is extremely expensive, very few industries could afford the large treatment units as recommended by most of the Consultants.

We are being pioneer in the field of wastewater treatment, always in the search of latest and techno-commercially viable technology, system by which the need of the society can be easily satisfied.

Major Technologies:

• ASP : Activated Sludge Process

• SBR : Sequential Bioreactor

• MBR : Membrane Bio Reactor

• MBBR : Moving Bed Bio reactor

• SBR + MBBR: Combination of SBR with MBBR

WATER TREATMENT PLANT

The source of potable water can be extracted from underground or surface river water. The typical treatment process involved ions removal (by aeration and chemical reaction), TSS and Turbidity Removal (coagulation, flocculation, clarification and filtration). The systems can be implemented in stand-alone design and modular form.

Industrial effluent treatment plant

High demand in Industrial Wastewater Treatment (IWWT) gives us an opportunity in providing our best support with promising technology in treating industrial wastewater. Our specialization in wastewater treatment system allows us in completing many turnkey projects from construction of new Wastewater Treatment Plant (WWTP) to upgrading of existing plant.

We Design, Manufacture, Supply, Erection and Commissioning Effluent Treatment Plant (ETP) on Turnkey basis for various types and natures of Wastewaters, effluents which combines advanced physico-chemical treatment processes with tertiary polishing system for the removal of
organic, inorganic, oil and grease, heavy metals & suspended solids.
Our methodology – We analyze the effluent samples for different effluent parameters as per nature and compositions, carry out the treatability studies by using different methods checking techno-commercial Feasibility and then designed treatment schemes, processes accordingly to suit the purpose and need.
Our ETP systems are very compact, tailor made designs, portable required very less foot-print to accommodate, energy efficient. The up-gradation, modification in the existing ETP system is possible to achieve desired limiting standard laid down by the Pollution Control Board (PCB).

WATER TREATMENT PLANT

Zero liquid discharge (ZLD) is an engineering approach to water treatment where all water is recovered, and contaminants are reduced to solid waste. While many water treatment processes attempt to maximize recovery of freshwater and minimize waste, ZLD is the most demanding target since the cost and challenges of recovery increase as the wastewater gets more concentrated. Salinity, scaling compounds, and organics all increase in concentration, which adds costs associated with managing these increases. ZLD is achieved by stringing together water treatment technology that can treat wastewater as the contaminants are concentrated.

There are several benefits to targeting zero liquid discharge for an industrial process or facility:

• Lowered waste volumes decrease the cost associated with waste management.

• Recycle water on site, lowering water acquisition costs and risk. Recycling on-site can also result

in less treatment needs, versus treating to meet stringent environmental discharge standards.

• Reduce trucks associated with off-site wastewater disposal, and their associated greenhouse gas

impact and community road incident risk.

• Improved environmental performance, and regulatory risk profile for future permitting.

• Some processes may recover valuable resources, for example ammonium sulfate fertilizer or

sodium chloride salt for ice melting.

At SPG Infraprojects, we offer state of the art & customized ZLD plants based on industry, type of effluent and the desired output quality by client.

DESALINATION PLANT

Seawater desalination is the removal of salt and impurities from seawater to produce fresh water. Our desalination plants use a reverse osmosis process. Seawater is pumped into the desalination plant from the ocean and passes through pre-treatment filtration to remove most of the large and small particles.

The filtered seawater is then forced under pressure through special membranes whereby the osmosis process that normally occurs in nature is reversed. The pores in the membranes are so tiny that salt, bacteria, viruses and other impurities are separated from the seawater. In essence they act like microscopic strainers. About half of the water that enters the plant from the sea becomes fresh drinking water. The salt and other impurities removed from the sea water is then returned to the ocean via diffusers, which ensures it mixes quickly and prevents impacted the marine environment.

The desalinated water is then subject to further treatment to meet drinking water standards before it reaches our customers.

SOLID WASTE AND SLUDGE TREATMENT

Municipal solid waste treatment plant is a solid waste disposal facility consisting of different devices and combining with different sorting methods to separate useful resources out from the municipal solid waste. After processed by the MSW treatment plant, the municipal solid waste can be divided into different parts according to different raw materials, which can be further processed into valuable products by related machines. In a word, the plant can not only remove waste pollution and improve the environment but also create great profits and drive the economy.

Since the municipal solid waste treatment plant is also called MSW sorting machine, we, of course, will get classified garbage from it. The separated garbage can be sold directly or further processed by related machines to produce useful resources with higher prices and values, which can create great profits for our customers.

SLUDGE TREATMENT

The residue that accumulates in sewage treatment plants is called sludge (or biosolids). Sewage sludge is the solid, semisolid, or slurry residual material that is produced as a by-product of wastewater treatment processes. This residue is commonly classified as primary and secondary sludge. Primary sludge is generated from chemical precipitation, sedimentation, and other primary processes, whereas secondary sludge is the activated waste biomass resulting from biological treatments. Some sewage plants also receive septage or septic tank solids from household on-site wastewater treatment systems. Quite often the sludges are combined togethzer for further treatment and disposal.

Treatment and disposal of sewage sludge are major factors in the design and operation of all wastewater treatment plants. Two basic goals of treating sludge before final disposal are to reduce its volume and to stabilize the organic materials. Stabilized sludge does not have an offensive odour and can be handled without causing a nuisance or health hazard. Smaller sludge volume reduces the costs of pumping and storage.

TREATMENT METHODS

Treatment of sewage sludge may include a combination of thickening, digestion, and dewatering processes.

Thickening

A thickener can reduce the total volume of sludge to less than half the original volume. An alternative to gravity thickening is dissolved-air flotation. In this method, air bubbles carry the solids to the surface, where a layer of thickened sludge forms.

Digestion

Sludge digestion is a biological process in which organic solids are decomposed into stable substances. Digestion reduces the total mass of solids, destroys pathogens, and makes it easier to dewater or dry the sludge. Digested sludge is inoffensive, having the appearance and characteristics of a rich potting soil.

Most large sewage treatment plants use a two-stage digestion system in which organics are metabolized by bacteria anaerobically (in the absence of oxygen). In the first stage, the sludge, thickened to a dry solids (DS) content of about 5 percent, is heated and mixed in a closed tank for several days. Acid-forming bacteria hydrolyze large molecules such as proteins and lipids, breaking them into smaller water-soluble molecules, and then ferment those smaller molecule into various fatty acids. The sludge then flows into a second tank, where the dissolved matter is converted by other bacteria into biogas, a mixture of carbon dioxide and methane. Methane is combustible and is used as a fuel to heat the first digestion tank as well as to generate electricity for the plant.

Another enhancement of the traditional two-stage anaerobic digestion process is thermal hydrolysis, or the breaking down of the large molecules by heat. This is done in a separate step before digestion.

Sludge digestion may also take place aerobically—that is, in the presence of oxygen. The sludge is

vigorously aerated in an open tank for about 20 days. Methane gas is not formed in this process.

Dewatering

Digested sewage sludge is usually dewatered before disposal. Dewatered sludge still contains a

significant amount of water—often as much as 70 percent—but, even with that moisture content, sludge no longer behaves as a liquid and can be handled as a solid material. Sludge-drying beds provide the simplest method of dewatering but is primitive now. Better technologies include the centrifuge, and the belt filter press.