Pulp and Paper Mill Wastes Treatment

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  • Topic: Sewage treatment, Pulp and paper industry, Papermaking
  • Pages : 8 (2258 words )
  • Download(s) : 48
  • Published : May 15, 2013
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King fahd university of petroleum & minerals

Civil Engineering Department

CE 473

Design and Operation of Water and Wastewater Treatment Plants

Term Paper

Pulp and Paper Mill Wastes Treatment

Prepared by

Ahmad Ali
I D# 200**** ID# 200*****

Done For

Dr. Mohammed

13 May 2012

ABSTRACT

Pulp and paper mills cause many types of pollutants depending on the type of the pulping process used. This report starts by giving abreif description of the pulp and paper mills process. Then, it gives an idea about the sources of pollution from this process, its characteristics and its effects on the environment.After that, the report is going to review some of the available treatment processes of the pulp and paper mill wastewater and the performance of them. Finally, some conclusions are going to be drawn.

Table of Contents

ABSTRACT…...……..…………….……………..........................................II
TABLE OF CONTENTS………………………………………...………..III 1. INTRODUCTION….................................................................................1 2. Process Description ……………...……………..........................2 2.1. Strong Pulping …..…….…………………………..…....................2 2.2. Mechanical Pulping …..…….………..………………...................2 2.3. Chemo-mechanical pulping (CMP)…………………..…..............2 2.4. Thermo-mechanical pulping (TMP)…..………..…....................2 2.5. Papermaking ………....…….………..………………....................3 3. Pulp and Paper Pollution Matter ……..…...…………….3 3.1. Water Pollution …..…….…………………..……..…....................3 3.2. Air Pollution …..…….…………………..……..….........................4 4. WASTEWATER CHARACTERISTICS ………....………..….............4 5. WASTEWATER TREATMENT …….…………...………..…………..5 5.1. Physicochemical Treatment …………………...…........................6 5.2. Biological Treatment ……..............................................................8 6. Conclusions ………………………………...………………...…...10 7. REFERENCES ………...……………………………………………….11 1. INTRODUCTION

The rapid increase in population and the increased demand for industrial establishments to meet human requirements have created problems such as overexploitation of available resources, leading to pollution of the land, air and water environments. The pulp and paper industry is one of the most important industries in the world. The wood pulping and production of the paper products generate a considerable amount of pollutants characterized by biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids (SS), toxicity, and color when untreated or poorly treated effluents are discharged to receiving waters. The high water usage, between 20,000 and 60,000 gallons per ton of product, results in large amounts of wastewater generation.. The effluents from the industry cause slime growth, thermal impacts, scum formation, color problems, and loss of aesthetic beauty in the environment. They also increase the amount of toxic substances in the water, causing death to the zooplankton and fish, as well as profoundly affecting the terrestrial ecosystem. The growing public awareness of the fate of these pollutants and stringent regulations established by the various governmental authorities are forcing the industry to treat effluents to the required compliance level before discharging them in to the environment. Many studies have reviewed pollution control aspects of the pulp and paper industry. However, all these reviews have focused on the state of the art in integrated pollution management. This report, would examine some pollution control systems and compare the performance of the effluent treatment measures in use.

2. PROCESS DESCRIPTION[4] [5]
Pulping is the initial stage of the paper making industry and provides the processed material. It is the largest source of the pollution in the whole process of papermaking. High...
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