المادة المجلطة الفلوكة المروقة المستخدمة لمعالجة الصرف الصناعى

TLB-CHEMICALS
COAGULITANT/FLOCCULATANT/CLARIFIER
COMPOSITIONS:-
POLY ALUMINIUM CHLORIDE
TETRAPLEX(UNHYDROGENATED CALCIUM HYDROXIDE)
ANIONIC POLYMER

Process theory for the coagulation/flocculation/clarification:-
Coagulation is the destabilization of colloids by neutralizing the forces that keep them apart. Cationic coagulants provide positive electric charges to reduce the negative charge (zeta potential) of the colloids. As a result, the particles collide to form larger particles (flocks).Coagulation, thus, implies formation of smaller compact aggregates. Rapid mixing is required to disperse the coagulant throughout the liquid.

Care must be taken not to overdose the coagulants as this can cause a complete charge reversal and restabilize the colloid complex.

Effluents are heterogeneous in nature. Chemical coagulation is an important unit process in water treatment for the removal of turbidity. Its application in water treatment is followed by sedimentation and filteration. Various types of coagulants are being used to condition water before sedimentation and filteration. The most widely used coagulants are:
 Poly aluminum chloride {PAC}
 Lime
 Synthetic Organic Polymers

Currently Alum and PAC are most extensively used in water treatment .When brought in contact with water, they form positively charged aluminium hydroxide floc which agglomerates the negatively charged clays, slit, bacteria, algae organic matters etc causing them to settle down.
The sludge formation in alum and PAC is very high and homogeneous with solubility(35-55%),so can removed from civil under earth tanks easily with sucking pumps
Commercial polymeric coagulants are highly charged cationic products. Cationic polymeric coagulants /flocculants contain positively charged groups such as amino {- NH3 +}, Imino {- CH2 NH2 + - CH2} or quaternary amino {- + NR4}. Although a number of poly sulphonium and poly phosponium compounds have been reported, quadrivalenrt nitrogen is the charged site in all commercial cationic polymeric coagulants at the present time. Cationicity derives from the quadrivalent nitrogen, either via protonation of primary, secondary or tertiary amines or via generation of quaternary nitrogen groupings. Coagulants of this latter types are referred to as Poly quats. Cationicity of the quaternary nitrogen is independent of Ph, although, other parts of the polymer molecule may exhibit sensitivity to Ph, such as hydrolysis of ester linkages. Cationicity dependent on protonation, however, is a function of Ph .With out getting enmeshed in details of polymer- surface interactions, the gross effects of Ph on effective cationicity can be obtained from colloid titration behavior of the polymer at fixed levels of Ph.

Theory of Coagulation:

Extensive studies have shown that understanding the nature of suspended solids in a water system and then understanding four major factors that affect removal can lead to more effective solids removal:
1. Destabilization of particles
2. Microfloc formation
3. Agglomeration
4. Physical entrapment

To coalesce colloids, interparticle repulsion forces must be neutralized. Certain cationic chemicals can be used to decrease the negative charge. This is destabilization. In hydrophilic colloidal system where colloids are strongly hydrated, it may be necessary to ad a chemical that not only neutralizes surface charge, but also forms an insoluble complex with the colloid. After destabilization of the colloid {decreased net electric charge}, collisions between particles can occur. Through chemical bridging { adsorption } hydrogen bonding and van der waals forces, the colloidal particles form small microflocs, which in turn continue to colloid in a dynamic system and they form macroflocs or larger agglomerates, some times physically entrapping other particles. Depending on which of the four factors is more critical to solids removal, different approaches may be needed.

Typical coagulant addresses the following areas:
1. Reduction in treatment cost
2. Finished water turbidity
3. Sludge volume reductions
4. Reduction in colloidal silica
5. Increase in length of filter runs and reduction in wash water requirements
6. Enhancement in plant capacity and treatment efficiency

Poly-aluminum chloride

Specification (GB 15892-2003)

Identification
Synonyms: PAC; Aluminum chlorohydrate; Aluminum chlorhydroxide; Aluminum chloride, basic; Aluminum hydroxychloride; Poly Aluminum Chloride; Polyaluminum Chloride

CAS No.: 1327-41-9
Molecular Weight: N/A
Molecular Formula: [AL2(OH)nCL6-n x H2O]m; (1≤ n ≤5,m ≥ 10)
Molecular Weight: ~2000
Solubility in water: miscible

Parameters Specification
Drinking water grade Technical grade
Waste/sewage water treatment
Good coagulitant/flocculant
Excellent grade
Appearance yellow powder - solid grain

Alumina(Al2O3) content 30.0% min
Salt radical degree 40-90%
Insolubles in water 0.3% max
pH Value (1%) 3.5-5.0
N in NH4s form 0.01% max
As 2ppm max
Cr (VI) 5ppm max
Hg 0.1ppm max
Pb 10ppm max
Cd 2ppm max
Lime
Identifiers
CAS number
1305-62-0

PubChem
14777

ChemSpider
14094

RTECS number
EW2800000
Properties
Molecular formula
Ca(OH)2
Molar mass
74.093 g/mol
Appearance soft white powder/colourless liquid
Odor
odorless
Density
2.211 g/cm3, solid
Melting point
512 °C (decomp.)
Solubility in water
0.189 g/100 mL (0 °C)
0.173 g/100 mL (20 °C)
Solubility product, Ksp 4.68 × 10−6
Basicity (pKb)
2.37
Hazards
LD50
7340 mg/kg (oral, rat)

Anionic polymer
Polymer composed of negatively charged macromolecules and an equivalent amount of counter-cations.
APPEARANCE: White
VISCOSITY: 1000 to 3500 CPS
TYPICAL SPECIFIC GRAVITY: 1.02
TYPICAL DILUTION (Based on neat - as supplied): 0.25% to 0.5%
ACTIVE CONTENT: 30% to 40% (Mineral-based)
NOTES: Most common liquid polymer, Relatively easy to pump and activate.
SO THESE TYPES OF COAGULITANT/FLOCCULITANT/CLARIFITANT ARE ADDING STEP BY STEP NOT ONE SHOOT TO CAN MAKING THE GOOD QUALITY OF PRECIPTATION TO DIFFERENT TYPES OF THE WASTE WATER WHICH MAIN FORMED FROM OIL/GREASE/FUEL OIL/PERTROLEUM PRODUCTS WHICH INCREASING THE (BOD)/(COD)/(TOC)/(TSS)
WHERE THESE TYPES OF CHEMICALS ARE WORKED AT DIFFERENT (PH)SCALE(ACIDIC/NEUTRAL/ALKALINE) IN HIGH SPEED RETINTION TIME ACHIEVING OUR REQUIREMENT OF WASTE WATER WAS TREATED AND WITH SUITABLE (PH)=7.7-9

TLB-CHEMICALS
FOR
WASTE /SEWAGE WATER TREATMENT
TECHNOLAB EL-BAHAA GROUP
FOR WATER TREATMENT
COLONEL.OFFICER.DOCTOR
BAHAA BADR EL-DIN MAHMOUD
WASTE WATER TREATMENT CONSULTANT

MOBILE
0117156569/0129834104/0163793775/0174041455
TELEFAX
0224024307
E-MAILS
TECHNOLABELBAHAAGP@GMAIL.COM
TECHNOLABELBAHAAGP@YAHOO.COM
TECHNOLABELBAHAAGP@HOTMAIL.COM
TECHNOLABELBAHAAGP@LIVE.COM
WEB SITE/
WWW.TECHNOLABELBAHAAGP.GOOGOOLZ.COM

العنوان/3شارع المجد-اتميدة-ميت غمر-الدقهلية
شارع صلاح سالم-عمارات العبور-عمارة17ب-الدور الثانى-شقة 3-القاهرة
تيليفاكس/0224024307
موبيل/ 0117156569/0129834104/0163793775
بريد الكترونى/technolabelbahaagp@gmail.com/technolabelbahaagp@yahoo.com
موقع الكترونى/www.technolabelbahaagp.yoo7.com

» مادة الفلوكة لمعالجة الصرف الصناعى
» البوليمرات المستخدمة كمجلطات وفلوكات ومروقات لمعالجة الصرف الصناعى/Polymers for Coagulation, Flocculation and Dewatering of Solids and Sludge
» معالجة الصرف الصناعى(النموذج المتكامل لمعالجة مياه الصرف الصناعى)
» معالجة الصرف الصناعى( طرق المعالجة المستخدمة فى مصر)
» النموذج المتكامل لمعالجة مياه الصرف الصناعى