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الرئيسية / أرشيف الوسم : wastewater

أرشيف الوسم : wastewater

المعالجة البيولوجية اللاهوائية في المفاعل ذي الجريان الصاعد عبر طبقة الحمأة المعلقة UASB (Upflow Anaerobic Sludge –Blanket Process)

الكاتب : الدكتور المهندس عبد الله صغير مقدمة : لقد أصبحت معالجة مياه الصرف الصحي والصناعي من أولويات الدول والحكومات وذلك لحماية البيئة من التلوث المتوقع حدوثه نتيجة صرف هذه المياه، بما قد تحتويه من سموم وجراثيم ومواد غير متحللة ذات تأثير تراكمي، وما قد يتخلف عنها من مخاطر صحية …

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عمليات تداول ومعالجة حمأة الصرف الصحي

1.مقدمة عمليات المعالجة داخل محطات المعالجة لمياه الصرف الصحي تهدف الي فصل السوائل (المياه)  عن المواد الصلبة العالقة، وبعد المعالجة يتم التخلص من السيب النهائى بأحد الطرق المناسبة لظروف البيئة المحيطة بمواقع محطات معالجة الصرف الصحى. أما معالجة الحمأة (الرواسب الصلبة) العالقة مع المحتوى المائى والتى تتجمع بعد رسوبها فى …

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جمع العينات في محطات معالجة مياه الصرف الصناعي

1.مقدمة يغطي الرصد البيئي للمنشأة الصناعية الإنبعاثات إلى الهواء  والصرف السائل والمواد الصلبة والنفايات الخطرة , ويشمل الرصد البيئي تحديد الملوثات والإنبعاثات الخطرة من كل صناعة, وتحديد أوجه التلوث لكل خط إنتاج , وتحديد أوجه التلوث من الوحدات الخدمية في كل قسم , وتسجيل مخرجات القياسات والتحاليل لمعاملات التلوث في …

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Sludge Dewatering by Solid Bowl Centrifuges

Dewatering              Dewatering is the physical operation of reducing the moisture content of sludge and biosolids to achieve a volume reduction greater than that achieved by thickening. Dewatering, because of the substantial volume reduction, decreases the capital and operating costs of subsequent handling of solids.             Dewatering sludge and biosolids …

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Wastewater Treatment Plant

  1. Wastewater Characteristics             Wastewater is another term for sewage; water that has been used in homes, industries, institutions, and businesses that is not for reuse and is generally collected in a sewage collection or drainage system .In general, raw wastewater is 99.9% water and 0.1% impurities.              However, the …

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Aeration in Wastewater Treatment

Aeration in Wastewater Treatment Introduction [1]         Aeration is a unit operation of fundamental importance in a large number of aerobic wastewater treatment processes. When a liquid is deficient in a gas (oxygen, in this case), there is a natural tendency of the gas to pass from the gas phase, …

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 Wastewater of Food Industry

 Introduction                The wastewater from industries varies so greatly in both flow and pollution strength. So, it is impossible to assign fixed values to their constituents. In general, industrial wastewaters may contain suspended, colloidal and dissolved (mineral and organic) solids. In addition, they may be either excessively acid or alkaline …

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الحلقه الاولي: في تنقية مياه الصرف الصحى

The first episode in the treatment and desalination of sewage نبدأ بمشيئة الله مع حضراتكم رحله جديدة ( لمعالجة مياه الصرف الصحى ) نبدأ الحلقه الاولي : 1-في  البدايه يجب أن نعرف أن مياه الصرف تنقسم  من حيث مكان المنشأ إلى: مياه مجاري منزلية أو مياه صرف بلدية: وهي تلك …

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Neutralization in wastewater treatment and waste stabilization.

NEUTRALIZATION                Neutralization is a common practice in wastewater treatment and waste stabilization. If a waste stream is found to be hazardous because of corrosively, neutralization is the primary treatment used. Moreover, neutralization is used as a pretreatment system before a variety of biological, chemical, and physical treatment processes. Since …

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Monitoring and Evaluation of Waste Stabilization Ponds

Introduction            Once a WSP system has been commissioned, a routine monitoring programmer should be established so that the actual quality of its effluent can be determined. This permits a regular assessment to be made of whether the effluent is complying with local discharge or re-use standards. Moreover, should a …

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Wastewater of Ceramic Industry

Introduction           Generally the term of ceramics (ceramic products) is used for inorganic materials (with possibly some organic content), made up of nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous (e.g., a glass). …

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Wastewater Treatment of Ceramic Effluents

Introduction          Pollution aspects related to the ceramic industry are mainly due to dust emission both in workplace and in ambient air. Effluents are characterized by higher concentration of suspended solids.           Large volumes of wastewater are generated during the process. Process wastewater is generated mainly when clay materials are …

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SOLIDS IN SEWAGE

The solids present in the sewage are of two types viz., Organic solids, and Inorganic solids. Organic solids are the substances derived from living things like produces from plant and animal. Examples of organic solids are carbohydrate, protein, and fat. The organic solids undergo decomposition by the microorganisms. Inorganic solids …

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Disinfection of Wastewater by Ozone

  1- Introduction           New water-treatment goals for disinfection by-products (DBP) and for microbial inactivation have increased the need for new disinfection technologies. Water and wastewater systems will need to use disinfection methods that are effective for killing pathogens without forming excessive DBP [1]. Ozone is an attractive alternative. This technology …

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تأثير تركيز المواد الصلبة العالقة للسائل المخلوط على المساحة واستهلاك الطاقة في المعالجة البيولوجية بالحمأة المنشطة

مقدمة هناك العديد من معايير التصميم والتشغيل التي تؤثر في اختيار نوع وطريقة المعالجة، ومنها عنصري المساحة المطلوبة للإنشاء، ومعدل استهلاك الطاقة لكل متر مكعب من المياه المعالجة. تختلف طرق المعالجة البيولوجية باستخدام الحمأة المنشطة في المدى المسموح به لكلًا من: نسبة الغذاء إلى الكائنات الحية الدقيقة (F/M)، تركيز المواد …

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Using of synthetic polymers as coagulant aids in industrial wastewater treatment

Coagulation           The principal units of chemical treatment of industrial wastewater that are Coagulation, flocculation and precipitation. Coagulation is a destabilization process by particle charge neutralization and initial aggregation of colloidal and finely divided suspended matter by inorganic coagulant. To accelerate this process, a coagulant aid (often a high molecular …

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pH Adjustment for Industrial Wastewater

Adjusting the pH of water and wastewater is carried out by the addition of an acid or a base, depending on the target pH and process requirements. Some processes such as boiler operations and drinking water standards need neutral water at a pH of 7.           Water or wastewater is …

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Wastewater of Dairy Industry

Introduction          The dairy industry is generally considered to be the largest source of food processing wastewater in many countries. As awareness of the importance of improved standards of wastewater treatment grows, process requirements have become increasingly stringent. Although the dairy industry is not commonly associated with severe environmental problems, …

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Operational Factors Affecting Treatment of Wastewater by Anaerobic Processes

Anaerobic processes are defined as processes where neither oxygen nor nitrate is present. These processes are carried out by a large and varied group of micro-organisms which normally live in a symbiotic relationship. [1]        Anaerobic digestion has contributed a lot in conservation of   natural resources which cannot be replenished …

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Sedimentation in Wastewater Treatment

Definition and Objective of Sedimentation [1]             Sedimentation is defined as a unit operation in which suspended particles are separated    from a suspension by gravitational settling .Coagulation  involves the addition of chemicals to induce faster aggregation and settling of initially finely divided suspended and colloidal particles. The objective of sedimentation …

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