Sun Brand blog
Practical notes for plant operators, buyers and formulators on choosing, preparing and dosing water-treatment polymers.
Latest posts
Spec sheet, SDS and COA: what each polymer document tells you
Three documents travel with every bag of polyelectrolyte. Here is what each one is for, and which one to ask for when.
Read →How long does polyelectrolyte last?
Shelf life of polyelectrolyte powder in the bag and of the solution in the tank, the signs of ageing, and how to stock without waste.
Read →Cleaning up a polyacrylamide spill safely
Polyacrylamide is not very hazardous, but a wet spill makes a floor dangerously slippery. How to clean dry and wet spills, and what to wear.
Read →Hard water, encrustation and the polymers that prevent it
Why fabric turns grey and stiff in hard water, and how anionic polymers such as SunRedep keep minerals and soil from settling back.
Read →Polyelectrolyte for electroplating effluent
How metal-finishing effluent is treated, where the metals drop out, and why an anionic flocculant finishes the job.
Read →Belt press, centrifuge or screw press: matching the polymer
Each dewatering machine treats the floc differently. What each one asks of the polymer, and how to tune grade and dose on site.
Read →Too much polymer? Signs of overdosing and how to fix it
More polyelectrolyte is not always better. How to spot an overdose in the clarifier and on the press, and how to bring the dose back.
Read →Manual or automatic polymer make-up?
Batch tanks, eductors and automatic three-chamber units compared, with the practices that keep solution consistent in either case.
Read →City guides
Mumbai MIDC chemical and pharma ETPs: a guide
How chemical, pharma and textile units in Mumbai's Thane–Belapur, Taloja and Tarapur MIDC belts treat effluent before it goes to a CETP, and where polymer fits.
Read →Pune auto and engineering ETPs: a guide
How vehicle, component and engineering plants in Pune's Chakan, Pimpri-Chinchwad and Ranjangaon belts treat metal-finishing and paint-shop effluent.
Read →Ahmedabad dye and textile CETPs: a guide
How dye makers and textile process houses in Ahmedabad's Vatva, Naroda, Odhav and Narol clusters pre-treat effluent to meet common effluent plant limits.
Read →Surat textile processing effluent: a guide
How Surat's polyester dyeing and printing units and the CETPs at Pandesara and Sachin handle colour, solids and heavy sludge from synthetic textile processing.
Read →Vadodara and Ankleshwar chemical effluent
How chemical, intermediate and petrochemical units around Vadodara, Nandesari and Ankleshwar treat high-strength effluent, and where polymer earns its place.
Read →Delhi NCR industrial ETPs and STPs: a guide
How industrial areas, auto plants and the large sewage plants of Delhi NCR treat wastewater before it reaches the Yamuna, and which polymer suits each job.
Read →Kolkata leather and engineering effluent
How Kolkata's tanneries at Bantala, Howrah's foundries and the Hooghly water works treat their water, from protein-rich effluent to monsoon turbidity.
Read →Ludhiana dyeing and electroplating effluent
How Ludhiana's hosiery dye houses and electroplating units treat effluent for the city's common plants and the Buddha Nullah clean-up, and where polymer fits.
Read →Jaipur textile printing effluent: a guide
How Sanganer and Bagru printing units in Jaipur deal with coloured wash-off, thickeners and scarce water, and how decolorant and polymer help them reuse it.
Read →Nagpur power, mining and MIDC water
How thermal power stations, coal mines and MIDC plants around Nagpur clarify raw water, settle mine and ash water, and treat food and textile effluent.
Read →Belagavi sugar mill and distillery effluent: a guide
How sugar mills, distilleries and foundries around Belagavi treat their wastewater through the crushing season, and which polymer suits each stream.
Read →Bengaluru apartment STPs: sludge dewatering guide
A practical guide for apartment and tech-park STP operators in Bengaluru on handling excess sludge, choosing a polymer and keeping treated water fit for reuse.
Read →Chennai industrial ETPs and STPs: a polymer guide
How plants in the Sriperumbudur, Oragadam, Ambattur and Guindy belts and Chennai's large sewage works use polymer, and what a local supplier changes.
Read →Coimbatore foundry and textile mill water: a guide
How Coimbatore foundries keep recirculated water clean, how its textile mills handle coloured effluent, and how city water works manage monsoon turbidity.
Read →Erode, Bhavani and Perundurai: an effluent guide
How yarn and fabric processors in Erode and Bhavani and the tanneries of Perundurai treat their effluent close to two protected rivers.
Read →Hosur auto and electronics ETPs: a treatment guide
How vehicle, component and electronics plants in the Hosur SIPCOT estates treat phosphating, painting and plating effluent, and where polymer fits.
Read →Hyderabad pharma ETPs: a polymer guide
How bulk drug and pharmaceutical units around Patancheru, Jeedimetla and Bollaram treat high-strength effluent, and why consistent polymer matters.
Read →Karur home-textile dyeing effluent: a guide
How Karur dye houses producing bed linen, curtains and furnishings treat heavy cotton dyeing effluent and recover water for reuse.
Read →Kochi seafood and refinery effluent: a guide
How Kochi seafood processors, refinery and chemical units and water works deal with fat-rich, oily and monsoon-driven water treatment challenges.
Read →Madurai water works and industrial effluent: a guide
How Madurai's Vaigai-fed water works and its textile, rubber and food units use coagulant and polymer, with tips for small plants.
Read →Mangaluru refinery, fertiliser and cashew effluent
How Mangaluru's refinery, fertiliser, chemical, cashew and seafood units treat their wastewater on a rain-heavy coast, and which polymer suits each.
Read →Mysuru sugar mill, silk and city sewage: a guide
How the Mandya–Mysuru sugar belt, the region's silk processors and Mysuru's sewage plants use polymer, and how needs change through the year.
Read →Puducherry industrial ETPs and groundwater: a guide
How pharma, textile, food and engineering units in Puducherry's industrial estates treat effluent and groundwater, close to Chennai stock.
Read →Ranipet, Vellore and Ambur tannery CETPs: a guide
How tannery CETPs in the Palar valley handle protein, fat, lime and chrome-bearing effluent and its heavy sludge, and where polymer helps most.
Read →Salem sago, starch and steel effluent: a guide
How Salem's sago and starch factories, steel and magnesite works and handloom dye units treat their very different effluents.
Read →Thiruvananthapuram water works and STPs: a guide
How Thiruvananthapuram's water works handle heavy monsoon turbidity, and how hospitals, campuses and Technopark run their on-site sewage plants.
Read →Thoothukudi power, chemical and seafood water
How Thoothukudi's thermal power stations, chemical plants and seafood processors treat raw water and effluent on a dry, salty coast.
Read →Tiruchirappalli distillery, engineering and water
How Tiruchirappalli's Cauvery water works, its heavy engineering units and the district's distilleries and sugar mills use polymer.
Read →Tiruppur dyeing effluent and ZLD: a treatment guide
How Tiruppur dye houses and CETPs treat knitwear dyeing effluent under zero liquid discharge, and where coagulant, decolorant and polymer fit in the train.
Read →Vijayawada river water and agro effluent: a guide
How Vijayawada's Krishna-fed water works, rice mills, dairies, food units and power plants use coagulant and polymer through the year.
Read →Visakhapatnam steel, pharma and power water
How Visakhapatnam's steel plant, the Parawada pharma city and coastal power stations treat process water and effluent, and which polymer fits.
Read →Guides
Polyacrylamide specifications explained
Molecular weight, charge density, residual acrylamide and more.
Read →Technical handbook (PDF)
Grade choice, dosing, jar testing, troubleshooting and storage in one four-page download.
Download →