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المحاضرة 2-3

الكلية كلية الهندسة     القسم  الهندسة البيئية     المرحلة 4
أستاذ المادة محمد عبد مسلم عبد الله الطفيلي       04/07/2018 08:24:22
PHYSICAL PARAMETERS
Physical parameters include color, odor, temperature,solids (residues), turbidity, oil, and grease. Solids can be further classified into suspended and dissolved solids (size and settleability) as well as organic (volatile) and inorganic (fixed) fractions.
CHEMICAL PARAMETERS
Chemical parameters associated with the organic and Inorganic content. Organic content parameters of wastewater include the biochemical oxygen demand (BOD), chemical oxygen demand (COD), total organic carbon (TOC), and total oxygen demand (TOD). Inorganic content parameters of wastewater include salinity, hardness, pH, acidity, alkalinity, iron, manganese, chlorides, sulfates, sulfides, heavy metals (mercury, lead, chromium, copper, and zinc), nitrogen (organic, ammonia, nitrite, and nitrate), and phosphorus.
BACTERIOLOGICAL PARAMETERS
Bacteriological parameters include coliforms, fecal coliforms, specific pathogens, and viruses. Design considerations for wastewater treatment facilities are based in part on the characteristics of the wastewater.
SUMMARY OF WASTEWATER CHARACTERISTICS

• Table A-2 shows the typical concentration range of various constituents in untreated domestic wastewater. Depending on the concentrations, wastewater is classified as strong, medium, or weak.
• The types and numbers of microorganisms in untreated domestic wastewater vary widely; examples of such variations are shown in Table A-3.
• Table A-4 shows typical mineral increases resulting from domestic water use.
• Table A-5, shows particle sizes related to different categories.
• Odors in wastewater are caused by gases from decomposition or by odorous substances within the wastewater. Table A-6 lists examples of odorous compounds associated with untreated wastewater.
• Organic matter in wastewater can be related to oxygen demand and organic carbon measurements.
• Table A-7 shows several measures of organic matter.
• Wastewater contains a variety of solid materials varying from rags to colloidal material. In the characterization of wastewater, coarse materials are usually removed before the sample is analyzed for solids. The various solid classifications are identified in Table A-8 .






المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .