Wastewater & Effluent Treatment

Wastewater and dewatering specialists bringing considerable savings on daily running costs, enabling water reuse and waste-to-energy

We support you by:

Chemical Treatments

Coagulants and Flocculants, odour control, pH correction, inorganic coagulants, specialist products and antifoams for solids removal, water clarification, lime softening, sludge thickening and solids dewatering.

Treatment Plant

Dissolved Air Flotation (DAF) is a clarifying water treatment process proven to concentrate and remove a wide range of suspended solids in wastewater at a high rate of removal – solids, fats, oils, grease and support water reuse.

Improved Efficiency

Wastewater to energy through bespoke machines, equipment and processes for mechanical pre-treatment of screenings and sludge in both municipal  and industrial wastewater purification plants.

Wastewater Treatment

Wastewater varies greatly dependent on the application it has been used for and therefore the wastewater management process must be carefully selected with the effluent quality in mind. Considerations must also be made for the expected water waste quality target following treatment.<br>

For example, if onsite industrial wastewater treatment is required to pre-treat wastewater prior to directing it to the sewer, the choice of water technology may simply be one process. Our Sci-Enox System is designed to manage a higher load of contamination and allows rapid removal of background pollutants – making this water compliant for directing to the sewer in many cases. However, if a water treatment process is required to make wastewater suitable to discharge to a river or to reuse the water again within the manufacturing facility, a combination of technologies will be required. Advanced water systems like the Sci-Nex System are deployed as the final tertiary step to achieve ‘water polishing’ prior to discharge or reuse.

Effluent contamination
we can treat

We design and manufacture two different water treatment technologies – the Sci-Enox and Sci-Nex Systems. The systems are intended for different types of pollution and levels of contamination. Both processes aim to prevent water pollution and protect our finite water sources. Both processes remove organic chemicals from drinking water and wastewater, including pharmaceuticals, industrial chemicals, pesticides, dyes and ingredients for personal care products.

What [COD] can we treat?

Typically, the Sci-Enox process manages from a few thousand mg/L COD (chemical oxygen demand), down to a few hundred. This can therefore be suitable as a pre-treatment step for the Sci-Nex process. Or it can be used to make wastewater suitable for sewer discharge to avoid trade effluent charges. The Sci-Nex process manages from a few hundred mg/L down to below 30 mg/L COD. This makes it suitable for discharge to the sewer which have extremely strict wastewater quality limits, or suitable for reuse in some cases.

What flow rates do we treat?

The flow rate that our water treatment systems manage depends on contamination levels. They can be connected in parallel to suit the flow rate required. For higher flow rates, Sci-Nex wastewater treatment reactors can also be submerged into large treatment tanks or basins like ‘cartridges’ to form the tertiary stage of the water treatment plant.

Sci-Nex Wastewater Treatment Plant

We supply industrial water equipment to industrial manufacturers for onsite wastewater management to help companies meet their trade effluent requirements. We also provide advanced water technologies for use on a municipal effluent treatment plant to remove residues of pharmaceuticals, pesticides and personal care products. Wastewater treatment by our Sci-Nex water technology localises the pollutants within the effluent onto the surface of a patented adsorption media. A low electrical current is applied to the media bed which oxidises the pollutant (electrochemical oxidation), renewing the media and leaving the clean water to flow from the system. Industrial water treatment requires careful effluent water analysis to determine the most effective solution to meet individual water treatment targets. Wastewater is analysed at our in-house laboratory for this purpose.

Industrial wastewater treatment versus wastewater disposal

There are several options when it comes to industrial wastewater management or wastewater disposal. A common choice is requesting the local utility’s consent to discharge under a trade effluent agreement. In this case, the facility must pay a premium for their trade effluent services and the effluent is managed by the municipal wastewater treatment plant (WWTP). In some instances, wastewater is managed offsite using a wastewater treatment service. This can be down to the nature of the effluent as in some cases advanced water technologies are required to treat the effluent. But the ongoing charge of trucking water offsite is expensive and is damaging to the environment.

Managing Wastewater On-Site

Managing industrial wastewater treatment onsite could be a better option. A small water treatment plant can pre-treat effluent to make it suitable to be discharged to the sewer, safe to be discharged to the environment or reused around the facility for other purposes. The reuse of industrial water is also becoming more widely adopted as it saves incoming water costs and the external management of wastewater costs. Onsite industrial water treatment involves varying technologies dependent on the wastewater quality and wastewater treatment needs. Sci-Nex involves adsorption combined with electrochemical oxidation in one containerised water treatment plant to save space and lower operational requirements.

Environmental Impacts

The environmental impacts of industrial wastewater pollution are severe and worsening as populations grow and the demand on water resources becomes greater. Not only does water pollution damage aquatic ecosystems, contamination of our waterways limits the amount of safe water we have available for drinking purposes. Allowing inadequately treated wastewater to flow into waterways means that harmful chemicals are mixing, causing untold reactions which then require remedies of water pollution once this is abstracted for use again. Wastewater treatment onsite at an industrial facility stops the issue at the source, preventing the effects of environmental pollution from developing. A further step many companies are now taking is to perform wastewater recycling onsite, which results in a fully closed loop Zero Liquid Discharge (ZLD) facility.

Wastewater Treatment to Reduce Environmental Impacts

Applying a wastewater treatment process to treat a side stream of effluent for use to flush toilets or irrigate land onsite would provide a major contribution to water conservation. Wastewater management involves the reduction of the overall COD (chemical oxygen demand) in water, as well as the removal of colour or specific contaminants in certain cases which are known to have adverse effects, such as volatile organic chemicals (VOCs). Existing technologies such as activated carbon, Fentons and other AOPs either move the contamination out of the water but do not destroy it, or destroy it using water treatment chemicals, which come with their own harmful environmental impacts. Our processes are considerate to the environment, provide water treatment for various organic chemicals and types of pollution, including colour. These advanced water technologies manage industrial wastewater with low maintenance, no requirement to apply for consent to discharge to the sewer and also enable the recycling of industrial wastewater.

Industrial Wastewater

Industrial wastewater from chemical, petrochemical or personal care product manufacturing must be managed with care using the appropriate industrial wastewater treatment process. We are able to analyse your wastewater and provide recommendations for the most suitable and cost-effective industrial waste water treatment processes to meet your treatment needs.

Lifesciences Wastewater

Wastewater solutions for life sciences wastewater must be capable of removing organic chemicals, like Triton X-100 (an industrial solvent used as an ingredient and for cleaning), as well as antibiotic residues in order to prevent the spread of antimicrobial resistance (AMR).

Sci-Nex has been applied to provide life sciences wastewater treatment in the UK, Europe and Asia

Agricultural Wastewater

Agricultural wastewater refers to effluent from a pesticide manufacturing facility, as well as run-off from land containing pesticides used to treat crops.

An agricultural wastewater treatment plant must be efficient in treating low levels of contamination. The Sci-Nex process localises the pollutants onto the surface of a patented adsorbent media. A low electrical current is applied to the media bed which oxidises the pollutants, leaving the clean water to flow from the system.

 

Textiles Industry Wastewater

Wastewater treatment for textile industry is required for various reasons including removing pesticides from land run-off from growing natural resources like cotton. This is the responsibility of the local utility to remove from water abstracted for drinking purposes prior to distributing it to households – inevitably increasing prices for domestic water users.

Dying clothes involves strong chemical dyes which if left in effluent can cause severe damage to natural ecosystems. These must be removed onsite by the manufacturing facility or require management by the local utility.

Wastewater solutions for pesticides, dyes and chemicals provide environmental protection and prevent textiles manufacturers from receiving fines.

WASTEWATER TREATMENT CHEMICALS

We have all the chemicals you need!

pH Adjustment

pH adjustment may be required for a number of reasons:
- To directly precipitate out chemicals otherwise present as more soluble salts
- To increase the efficacy of any coagulants used
- To enable discharge limits to be met
- To maximise the concentration of the most efficient chlorine containing species for disinfection (e.g. hypochlorous acid vs hypochlorite)

The most commonly used chemicals for pH adjustment in effluent plants are lime, sodium hydroxide and sodium bicarbonate.

Flocullants

The addition of flocculants brings the microflocs into contact resulting in their bonding and formation of flocs which are large enough for them to be separated out from the waste water. The flocculants are organic polymers (generally polyacrylamide) with varying charge densities and molecular weights. They act by forming a “bridge” between the microflocs. Mixing which should be gentle is critical to the performance of the flocculant and is generally done by mechanical or air agitation; overmixing can lead to the breakdown of the flocs. We can supply flocculants in different forms including powders and emulsions in a variety of different molecular weights and charge densities.

Specialist Products

We have a number of products which can be used in more specialised applications, for example products for the removal of specific chemical moieties to meet discharge standards. As biological treatment can also form part of the process in effluent plants we can supply products containing bacteria selected for their efficacy in waste water treatment. We also have a range of products which provide the nutrients required (nitrogen/phosphorus) for the bacteria to thrive.

Coagulants

Many of the solid particles in water are as suspended solids (a colloid). They are very small electrically charged particles which repel each other and will not settle out of suspension by gravity alone in a reasonable timeframe; hence the need for chemical treatment. This typically results in the removal of 80-90% of suspended solids by chemical precipitation. Coagulants act by neutralising the charge which enables the particles to come together forming slightly larger particles or microflocs. Traditional coagulants were inorganic compounds, and can have advantages over the inorganic coagulants in that the produced sludge volume is often less, sludge disposal costs can be lower and they are less pH dependent.

Anti-Foams

Antifoam agents are often used in both sewage treatment plants as well as in other industrial waste water treatment applications. We have a variety of antifoam formulations, both organic and inorganic.

Odour Control

Odours are not infrequently generated in effluent plants and may be particularly associated with the sludge which contains higher concentrations of odorous chemicals. We have a number of products which are able to neutralise many odours such as those associated with hydrogen sulphide, ethylamines, butylamines, mercaptans, fatty acids and ammonia.

Oxidation (Disinfection)

We have a number of oxidising biocide products which can be used in disinfection applications.