Blogs/News/PSAs

Edible Liquid Salt Purification

Without adding flocculant, resistant to pollution, high filtration accuracy, stable &high quality refined brine.

Nanofiltration Systems Sulfate Removal

The membrane has charged groups that selectively reject multivalent anions such as sulfate ion.

Primary Brine Purification

Ceramic Brine Membrane Purification Solution (hereinafter called CBS Process).

JIANGSU JIUWU HI-TECH CO. LTD.,founded in 1997, focus on producing ceramic membrane for many years. And JIUWU HI-TECH has become a leading company in the membrane separation industry. We sincerely invite and welcome people from all around the world to invest and create more values together.

Standard discharge, reclaimed water reuse and zero effluent discharge

1. As for paper mill wastewater treatment, pulping wastewater is the most difficult wastewater to be treated in the papermaking industry. The organic pollutants and inorganic salts are high in content, complex in composition, high in hardness, high in costs. The technical staff of JIUWU work with experts from the Institute of Membrane Science and Technology of Nanjing Tech University and develop successfully membrane technology as the core of zero effluent discharge process or zld (zero liquid discharge).

2. Using the process of pretreatment, membrane integration, evaporation crystallization and other related processes turns waste into valuable and achieves the sewage recycle. The project forms a major technological breakthrough in the field of wastewater treatment of pulp and paper.

Application background

• Industrial water prices continue to rise
• Industrial water intake limit
• Increased emission water quality standards (COD, TOC, etc)
• Enforcement requirements for environmental protection and water reuse rate, etc.
• Large demand for fresh water
• Large amount of wastewater discharge
• The composition of wastewater is complex, and the content of organic pollutants and inorganic salts is high.

Core advantage of process package

• Independent research and development, Global First
• Turn waste into treasure and realize 100% full reuse of wastewater
• Multiple 10,000-ton demonstration projects
• Reuse water, salt, and dry mud
• The water quality of the produced water is good and meets the requirements for productive reuse.
• zld (zero liquid discharge)

Case

Jiangsu Jiuwu Hitech Co., Ltd has done the largest zero liquid discharge project in paper pulp industry. The project is located in Japanese Oji Paper Co., Ltd. (OJI PAPER) in China, the scale of 40000m3/day of papermaking, pulp wastewater. Main processes include ozone-coupled biofilter (removing COD), the integrated membrane system of uf technology and reverse osmosis, electrodialysis (EDR) concentration system, MVR evaporation crystallization system. Through above-mentioned advanced processing system, the realization of wastewater recycling and zero liquid discharge. The clean water is supplied to the power plant desalination system and the production water system, waste salt is supplied to the Transportation Bureau to do snowmelt agent and chemical raw materials. The project which is the world's largest zero liquid discharge project in paper pulp industry has been stably operating for more than 3 years.

Process of Paper Industry Wastewater Treatment

Palm oil is not only the highest yielding cheap vegetable oil on the earth but also a safe raw material for edible oils and daily chemicals, and a raw material for biofuel.

As a raw material for edible vegetable oils, chemical raw materials and biofuel, palm oil has attracted worldwide attention in the process of ecological protection and industrial pollution. As a result, palm oil wastewater treatment also receives much attention. 

Palm oil mill effluent (POME)is a yellow liquid with a unique unpleasant smell and comes from oil extraction, cleaning and washing process in the POME factory, which is featured with very high COD and BOD. 

Due to its acidic nature (pH 3.4–5.2), high salt and suspended solids, oil and grease, the untreated discharge of POME can result in considerable environmental consequences.

Each ton of palm oil produced emits about 20 tons of high-concentration organic wastewater. When the high-concentration organic wastewater per ton is treated according to the current sewage pond treatment method, it is equivalent to emitting more than 210 million tons of carbon dioxide gas into the atmosphere every year. It's important to solve the problems inpalm oil mill effluent treatment.

To achieve environmental requirements and economic challenges, the POME factories are trying to get efficient and return on the investment process.

JIUWU HI-TECH has made a lot of studies and many rich experiences for POME treatment since 2012.
JIUWU HI-TECH offers the solution for POME treatment with an integrated ceramic membrane technology which is a green, friendly environment, economic efficiency and has the following technical benefits:

• No discharge of wastewater
• Low capital investment ;
• Low operation cost;
• Oil is concentrated and water is recycled

After integrated process filtration, concentrate including surplus sludge from anaerobic and centrifuge is used as fertilizer for cattle farm and purified water can be used for recycling or the bolier feed water due to salts and organic compounds are removed.