Customised Integrated Solution

Leather Industry

01

OVERVIEW

Leather industry adopts the double membrane process to recycle wastewater with high salinity and complex water quality. The product water can be used for other processes in leather production. This project significantly reduces the wastewater discharge and freshwater
consumption.

02

WATER QUALITY

03

TYPICAL PROCESSES

Pretreatment + Ultrafiltration + Reverse osmosis
Past project capacity: 2000m3/d ‒ 2700m3/d

Customised Integrated Solution

Petrochemical Industry

01

OVERVIEW

In the petrochemical industry, double membrane processes are used to recycle petrochemical wastewater with complex water quality. The permeate can be reused for circulating cooling water and pure water production. This process solves the problem of unstable operation that similar projects are facing and reduces water cost which has significant social and economic benefits.

02

WATER QUALITY

03

TYPICAL PROCESSES

Pretreatment+Ultrafiltration+Reverse osmosis
Past project capacity: 1680m3/d ‒ 31200m3/d

Customised Integrated Solution

Petrochemical Industry Acetic Acid Recovery

01

OVERVIEW

PTA wastewater in the petrochemical industry has high acetic acid content. If the acetic acid in the water is recycled and returned to the main process, the consumption of fresh acetic acid will be reduced which brings considerable economic benefits to the company.

The industrial acetic acid recovery unit adopts the treatment process of heat exchanger cooling, pretreatment and two stage reverse osmosis. The concentrate is returned to the main process and the permeate is transported to the wastewater treatment system.

02

WATER QUALITY

The water to be treated mainly contains acetic acid, p-toluic acid, terephthalic acis, methyl acetate, methanol, formaldehyde, etc. with high temperature and low pH. PTA wastewater is processed through cooling and membrane filtration to achieve product water recovery rate over 90%; acetic acid recovery rate over 80%; acetic acid content in the productwater as low as possible.

03

TYPICAL PROCESSES

Pretreatment + Ultrafiltration + Reverse osmosis
Past project capacity: 720m3/d ‒ 6240m3/d

Customised Integrated Solution

Petrochemical Industry

Wastewater Treatment

01

OVERVIEW

In 2016, Suntar carried out the expansion of the Jiaxing petrochemical Phase II project. In the petrochemical industry, PTA wastewater is difficult to treat due to the high COD and poor biodegradability. With extensive project experience, Suntar adopts the treatment processes of pretreatment, anaerobic and 2 stage aerobic treatment for the PTA wastewater. The treated water is then passed through double membrane treatment of ultrafiltration and reverse osmosis to meet the standards of circulation cooling water and pure water recycle.

02

WATER QUALITY

03

TYPICAL PROCESSES

Pretreatment+Ultrafiltration+Reverse osmosis
Past project capacity: 9600m3/d ‒ 71800m3/d