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EditorNaina Shah
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Masthead
UNITING THE VIBRANT WORLD OF WATER - TO PROVIDE A PROACTIVE PLATFORM FOR THE WATER INDUSTRY TO CONVERGE AND WORK TOGETHER IN ACHIEVING SOLUTIONS TO GLOBAL WATER PROBLEMS.
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8 Water Today - The Magazine l November 2016
C O N T E N T S
Waste Water Treatment in Chemical Industries: The Concept
and Current Technologies....28The article highlights the Concept and Current industrial
wastewater treatment technologies in chemical industry. By Mohamed Osman Awaleh & Youssouf Djibril Soubaneh
Chemicals in Water & Wastewater Treatment – Boon
and Bane.......54Chemicals are a boon in water & wastewater treatment, but
then where these can be avoided will be a bane & not a boon.By Er Dr S Saktheeswaran and Er Dr S Sundaramoorthy
New Multifunctional Antiscalant for Reverse Osmosis from
BASF............60This article presents a recently introduced innovative
multifunctional antiscalantfor RO desalination from BASF, which in effective in keeping the RO membrane surface free
from any scale and metals fouling deposition and helps to maximize production capacity while enhancing the energy
footprint of the RO plant.By Dr. Sujandi Sujandi & Felinia Edwie
Once Is Not Enough, Recycle..........66The article discusses the process to treat grey water generated from domestic & industrial sectors, citing two case studies wherein the use of recycled grey water generated from Car wash industry & industrial canteen. By Dr. Sonali Mokashi
Chlorine: Is it Really so Bad and what are the Alternatives?.....72It is obvious that disinfection of water is essential to the health and well-being of a society and it should also be apparent that chlorine is the disinfectant that has allowed water disinfection to be implemented on such a wide scale during the course of the last century.By Allen Wells
10 Water Today - The Magazine l November 2016
Masthead ....................................8
Water Wire.................................16
Launch Pad................................20
Event Zone.................................22
Product Zone.............................26
Editorial Calendar......................93
Subscription Form.....................99
Classifieds...............................100
Ad. Index..................................105
Editor’s Note.............................106
RE
GU
LA
RS
Prolagos Designs Water Distribution System
Delivering Energy Savings and Revenue Gains........86
By Aidan Mercer
Furthering the Course of Water Technologies for Water and Wastewater
Treatment and Recycle........90
By Kirloskar Brothers Ltd
Requirements for Discharge of Trade Effluent into the Public Sewers..........94By Cyrus Rice
C O N T E N T S
Wastewater Treatment Chemicals........82
The article gives an overview of Wastewater Treatment Chemicals. Read on...
By Daniel L. Theobald
14 Water Today - The Magazine l November 2016
Wastewater Treatment Chemicals
The article gives an overview of Wastewater Treatment Chemicals. Read on...
By Daniel L. Theobald
This is another in a series of educational
articles on water/wastewater!
This document is intended to
cover Wastewater Treatment Chemicals.
This is another in a series of educational articles on water/wastewater! This document is intended to cover Wastewater Treatment Chemicals. This generic presentation utilizes my extended number of years of experience working with
Wastewater Treatment Chemicals.
Presentation Details
• Overview • Applications and Uses • Conclusion
Overview
The current business environment presents complex environmental challenges. Ever tightening regulatory limits and pressures exist, causing increased costs and a need for optimized chemistry. Use, reliablesystems and proceduresunderstanding today’s environmental issues and the demand for clear/clean water.
Design a practical, creative strategy using a problem-solving approach to optimize chemistry and reduce overall costs, employmore performance-oriented and cost effective solutions for your wastewater treatment and also maintain creative wastewater treatment solutions to protect our environment and your bottom line. Chemicals identified in this articlesupport treatment in food processing, industrial, metal finishing, pulp and paper and municipal markets.
These products complement the protection of our environment and your bottom line.
Chemicals Products: Chemicals Products used in wastewater treatment encompass; inorganic and organic coagulants, flocculant polymers, odor control, de-foamers, filamentous bulking bacteria control, formulated microorganisms for biological treatment, acids andalkalines. Commodity Chemicals: Commodity chemicals used in wastewater treatment comprise; Sulfuric acid, Muriatic acid, Caustic soda, Lime slurries, Magnesium hydroxide,
82 Water Today - The Magazine l November 2016
Sodium bisulfite, Magnesium bi-sulfite, Potassium sulfite (no odor) and Sodium hypochlorite
Utilization: Utilization of these wastewater Treatment chemical products and commodity chemicals, covers; phosphorus reduction, foam control, liquid-solid separation, clarification, pH adjustment, hexavalent chromium reduction, heavy metal precipitation, chlorination, dechlorination, odor control, filamentous bacteria bulking control and sludge de-watering.
Applications and Uses:
Inorganic and Organic Coagulants: The significance of coagulation – flocculation in wastewater treatment emphasizes of applications including destabilization of colloids, removal of inorganic and organic matter (particulate and/or dissolved), removal of metals and anions (arsenic, phosphate etc.), as well as removal of pathogen microorganisms.
Flocculant polymers: Polymers ultimately contribute to separating solids from flowing wastewater. A polymer is a very large organic molecule; it is a chain of monomer subunits. Some of the monomer molecules have positive or negative charges. Polymer chains vary in length from thousands to millions of monomer units. If each monomer molecule was the size of a pearl, the chain length of most polymers would be 300 to 9,000 feet long! In wastewater treatment processes, polymers are used to coagulate suspended solids and produce large curds of solid materials(floc).
Odor Control Chemicals: In the innovative world of wastewater treatment, control of odors has moved from an afterthought to a primary design consideration for most collection and treatment facilities. As development encroaches on our facilitis and our new neighbors become less tolerant of nuisance odors, wastewater professionals have found the need to address odor as a principal concern in the intent and operation of collection and discussion facilities.As the care paid to odor control has increased, hence, accepts the number of odor control technologies that are used in the market.
Thither are a nearly unlimited number of unique odor control problems and challenges and it would be unacceptable to identify one technology as the most applicable for all sites. Any position or operation in which wastewater is collected, conveyed or treated has the potential to generate and release nuisance odors to the surrounding area.
Nevertheless, most odor problems occur in the assembling system, in primary treatment facilities and in solids handling facilities. In most examples, the odors associated with collection systems and primary treatment facilities are generated as a consequence of an anaerobic or “septic” condition.
Odor control chemicals are available for employment in specific positions.
De-foamers: Effluent foaming or excessive foaming in a treatment process is not only a detriment to the discharge quality but also for handling operations. Oftentimes, the diligence of a defoamer/antifoam is all that is needed to eliminate foaming issues.
Foaming, often induced by excessive phosphorus, residual surfactants, or young/old biomass, are the most dominant kinds of foaming conditions seen in many treatment processes. Correctly addressing these gaming issues can rid the treatment process outfall of unsightly scum — improving the overall treatment process and ensuring that receiving stream quality standards are assembled.
Nocardia foaming is a tenacious, unsightly thick brown foam found in many biological processes which carries over into secondary clarifier and digester operations.
Besides staining the surrounding surfaces, Nocardia reduces the transport of oxygen in aeration zones and hinders settling in the clarification stages leading to TSS carryover.
It also infiltrates the digesteroperations, reducing efficiencies and causes operational issues such as capacity limitations, overflowing, and gas production.
Harm can also pass to several treatment processes due to entrained air.
Reducing foaming due to Nocardia enhances treatment parameters, but also benefits aesthetic and housekeeping issues allowing for a cleaner operation.
Other wastewater treatment applications such as solids separation operations are also treated with defoamers. By dosing in drain lines from DAF’s, belt thickeners, and points of discharge from centrifuges, filtrate/centrate lines can be held free of foam and flowing evenly without backups and overflows.
Water Today - The Magazine l November 2016 83
Defoamers are highly effective in biological processes, includingadvanced wastewater treatment applications. Defoamers and antifoamer chemicals are employed to counteract these conditions.
Filamentous Bulking Bacteria Control: Filamentous Bulking Bacteria can be caused by Septic Wastes / Sulfides(high organic acids), Nutrient Deficiency - N and/or P (industrial wastes only) nitrogen – phosphorus, Low pH (<pH 6.0) and High Grease/Oil. Specific chemicals can be applied to counteract these conditions.
Formulated Microorganisms for Biological Treatment: Preparations that contain proprietary species that are in force under a broad reach of environmental conditions. They offer the ability to bio-degrade difficult substances such as phenols, detergents, alcohols, hydrocarbons, organic solvents, pharmaceuticals and a wide range of aromatic compounds.
These wares are available in both a liquid (vegetative state) and dry (spore and micro-encapsulated vegetative state) formulation. In addition, these products can include a Biochemical Oxygen Release product to increase dissolved oxygen levels, thereby
Daniel L. Theobald is “Wastewater Dan,” proprietor of Environmental Services. He is a professional wastewater and safety consultant/trainer with more than 24 years
of hands-on industry experience operating many variants of wastewater treatment processing units and is eager to share with others his knowledge about water conservation. Wastewater Dan can be reached at [email protected] or www.Conserve-On-Water.com
About the Author
improving the efficiency of the microbial component. Ultimately, microbiologyof wastewater can enhance wastewater treatment.
Acids and Alkalines: Acids and alkaline chemicals are applied in the first place to adjust wastewater pH.
Conclusion:
Allow us all act our part by examining the use of these wastewater treatment chemicals in products that complement the protection of our environment and your bottom line. And then hopefully you are ready to examine now, your use of Wastewater Treatment Chemicals. However, beforehand or in the process, feel free to reach out to me with your Wastewater Treatment Chemicals or any other Wastewater questions.
84 Water Today - The Magazine l November 2016
