Monitoring Industrial Wastewaters and their Effects on Wastewater Treatment Plants: Konya Example

Transcription

1 WATER & SEWERAGE ADMINISTRATION OF KONYA (KOSKİ) /TURKEY PRESENTATION CONTENT Monitoring Industrial Wastewaters and their Effects on Wastewater Plants: Konya Example Prof. Dr. Mehmet Emin AYDIN Konya N. Erbakan Ünv. Assoc. Rector Konya City Industrial Profile Konya Wastewater Plant Effects of Industrial Wastewater on WWTP Dr. Serdar KOYUNCU, Ph.D Wastewater Plants Manager Expert Workshop on - Sustainable Urban Water Management and Water Sensitive Cities Semp EGYPT Industrial System and Wastes Raw Materials Energy Harmful Wastes Re-use Solid Wastes Real Wastes Gas Recovery Products Side Products Water/wastewater Radioactive Konya City Industrial Profile Sector Quantity Percentage (%) Food ,6 Mining 8 1,1 Textile 46 6,5 Chemistry 2 0,3 Plastics 10 1,5 Metal 75 11,0 Car Washing ,00 Total Industrial Staff 526 plants A training program was started with the cooperation of the Mevlana Development Agency (MEVKA) and KOSKİ to decrease the industrial pollution loads and control at their sources. In this context; industrialists, trade chambers and the schools were used to give training for the development of the sustainability wastewater management Students As a result of this project, the industries are prepared to built pretreatment/wastewater treatment plants by KOSKI. 1

2 Application of Biofilm Collectors in Konya In 2013, KOSKI has started the implementation of the OCTOPUS project at the sewerage network to follow up the heavy metal pollution in the industrial wastewater and to define the control methods. The implementation studies are still continuing at 10 (ten) different locations. Sector KOSKİ Supervision Applications Built Pre Built Wastewater Plant MILK INDUSTRY - 5 FLOUR INDUSTRY 1 4 SESAME HALVA INDUSTRY 8 - MEAT INDUSTRY 5 1 CATERING INDUSTRY GALVANISATION - 1 PLASTICS RECYCLE PLANTS 15 - RUG WASHING PLANTS 36 - CARWASHING KONYA WASTEWATER TREATMENT PLANT The reclaimed water samples were collected from effluents of municipal wastewater treatment plant (WWTP) in Konya, Turkey. Konya WWTP has a capacity of 200,000 m 3 /day in I. Stage (2015) II. Stage (2030) Population Flow, m 3 /day Konya WWTP design influents and effluents quality Parameters Influents Effluents BOD 5 (mg/lt) 320 < 20 TSS (mg/lt) 295 < 20 COD (mg/lt) 775 < 90 ph TN (mg/lt) 50 - TP (mg/lt) 15 - Administration Building Arıza durumunda kapasite düşmesi Preliminary Purple Network AAT performansına bağlılık Sludge Thickeners Fınal Sedimentation Güvenlik Bıologıcal Sludge and Energy Productıon Desulphurization 10 Konya wastewater treatment plant flow diagram Konya WWTP has been designed for carbon and partial nitrogen removal. After biological treatment, the treated water will be disinfected by ultraviolet disinfection unit before it is disharged. Phosphorus removal is taken into consideration in addition to carbon and nitrogen removal for further extension in order to. fulfill EU disharge standarts

3 Sludge treatment, biogas production and energy recovery units Konya WWTP inlet and outlet water value 1 Parameter Unit Inlet Outlet Limit value BOD 5 mg/l < 40 COD mg/l < 120 Capacity: 834 kwh x 3 =2,5 MWh 2 SS mg/l < 40 TN mg/l TP mg/l ph - 7,8 7, Main transformator building 2 Cogeneration system 13 Production of biogas values and energy recovery Parameter Unit Process Specific gas production rate m 3 /kg VSSgid The total amount of biogas production m 3 /gün The property, electricity consumption kwh/gün FIRST PHASE ADVANCED TREATMENT PLANT RESULTS (150 m 3 /h) Using the pilot plant operating data, first phase advanced treatment plant was constructed in 2012 with a capacity of m 3 /day by KOSKI for reuse of wastewater. The electrical energy generated kwh/gün Electric Conversion Rate % 68 Consumed electric per flow kwh/m 3 0,26 Advanced treatment plant consists of coagulation-pressure sand filtration, pre-chlorination, final-chlorination and UV disinfection units. Multimedia sand filtration Reclaimed water storage tank Advanced Plant UV disinfection post cholorination Secondary Effluent storage tank Pre cholorination Coagulant 3

4 Application of purple pipe network NEGATIVE EFFECTS OF INDUSTRIAL WASTES TO THE WASTEWATER TREATMENT PLANTS The solid material coming from industries such as (hair, feather, shell, etc.) are harming the screens and other equipments. Drip irrigation By the increase of the organic load entering the system, the needed oxygen amount for the biological treatment will also increase and this increases the energy consumption of the plant. The coloured wastewater coming from the industries have negative effects on the treatment process. Petroleum Waste The uncontrolled discharge of the industrial wastewater containing heavy metals produce poisonous effects to the treatment plant micro organisms and these substances prevent the sludge to be used in soil improvement because of the poisonous passage to the activated sludge. With the ph variation, some bio-chemical reactions are negatively effected and especially during the anaerobic digestion process of the sludge, the biogas content may develop some undesirableproducts. 4

5 As a result of the reactions of some of the wastes, excess foam problems may be seen in treatment plants. During the waste water discharges, N(Nitrogen)- P (Phosphorus) variation, are disturbing the active sludge process and causing the formation of the algeas. White Foam Fatty Foam The amount of sludge accumulation increases due to the increase of the loads of industrial pollution. As a result, the energy input for the sludge treatment and disposal also increases. By the industrial wastewater discharge, the wastewater developes unwanted odours. This condition provides extra risks for the health of the treatment plant staff and the environment. The biological activity is negatively effected because of the passage of heavy metals to the sludge. As a result, the quality and the quantity of the produced gas decreases. The Sulphur originating from the industrial pollution, decreases the quality of the biogas produced from the treated sludge and damages the equipment producing energy. The industrial wastes cause odour, clogging, corrosion etc. problems on sewerage networks. H2S 5

6 CONCLUSIONS The sectoral prophiles of the industries of the province should be determined on the sectoral basis to define the industry wastewater characterization. Continuous follow-up and supervision must be done for sustainable wastewater control. In order to prevent illegal discharge and to determine the heavy metal pollution because of the industries, the application of the octopus system must continue. In order to save the sewerage system, urban wastewater treatment plant and the environment, the necessary control procedures must be applied to the industries. The industrıal wastewater supervision and follow-up system implementation must continue for the feasible operation of the wastewater treatment plants that are important from the ecological system point of view. Thanks for your attention. Dr. Serdar KOYUNCU Jan. 20 th 2012 Konya, Turkey 33 6