Wastewater treatment indicators
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Certain requirements must be met when discharging wastewater: pH value, COD, color intensity, total nitrogen, SS, and other ions of the company that comply with **standards. I have a question for fellow enthusiasts: Which substances affect color intensity? What should be done if the chromaticity does not meet the standards? Color is represented by both brightness and chroma, with chroma being the property of color that does not include brightness; it reflects the hue and saturation of a color. chrominance ； Chroma) Chroma is an indicator of the appearance of water quality; the color of water can be divided into apparent color and true color. True color refers to the color of water after suspended solids have been removed; the color of water before such removal is known as apparent color. For clean water or water with very low turbidity, the true color and apparent color are similar; whereas for industrially colored wastewater and sewage, there is a significant difference between the true color and apparent color. The colority of water generally refers to the true color, and the color of water is determined using the following methods: 1. Platinum-cobalt standard colorimetry (commonly used for natural water and drinking water, measured in degrees); 2. Dilution factor method (commonly used for industrial wastewater, measured in times). Pure water is colorless and transparent, while natural water contains soil, organic matter, inorganic minerals, plankton, etc., and often has a certain color. Industrial wastewater contains dyes, biological pigments, colored suspended solids, etc., and is the main source of coloring in environmental water bodies. Colored water reduces the transparency of water, affecting the growth of aquatic organisms and their aesthetic value; it also contains harmful chemicals. 1 milligram of platinum in one liter of water gives a color intensity of one degree.
Chromicity may arise from the chromophoric groups inherent in the organic compound itself, or it may result from the compound forming a color in combination with other substances. There are various methods for reducing chroma, among which the coagulation and sedimentation method is commonly used; it reduces chroma through adsorption and sedimentation during the coagulation process. Additionally, methods such as adsorption with activated carbon and oxidation with strong oxidants are also commonly used.
To determine which substance is responsible for the color, a decolorization method should be selected based on that substance, such as coagulation sedimentation (air flotation) separation, oxidation, adsorption, etc.
Current product: Sludge thickening belt-type integrated machine – HLT-ZM series composite felt filter belt sludge dewatering machine. Performance features: 1. Unique felt filter belt; the fibers generate capillary action, enabling instant removal of free water from the sludge. 2. High sludge capture rate; it can easily handle oily sludge and viscous sludge that traditional belt machines cannot process. 3. The sludge does not clog the filter fabric pores, allowing the sludge cake to be easily separated and reducing the amount of water needed for cleaning. 4. The transmission layer with large pores facilitates faster water filtration. 5. Compact design resulting in low investment costs. 6. Low power consumption and no noise. 7. High degree of automation, with remote monitoring and control capabilities. 8. Easy for daily maintenance. Working principle: The filter layer is equipped with fibers arranged in the same direction, while the transmission layer enhances the strength of the filter belt, extending its service life. When sludge falls onto the filter belt, the fibers in the filtering layer lie flat due to gravity, and the free water as well as the water squeezed out of the sludge is immediately removed through capillary action via the porous transport layer. The extruded sludge cake is lifted off the filter belt by the elasticity of the felt, resulting in little sludge remaining on the filter belt; thus, the filter belt’s mesh cells are not blocked, and the sludge cake can be easily removed. HLT-ZM-X series: http://rzdh.com/images/wn0803073.jpg
HLT-ZM-Z series: http://rzdh.com/images/wn08325.jpg
Process flow for HLT-ZM-X series 1: http://rzdh.com/images/HLT-ZM-X.png
Process flow for HLT-ZM-X series 2: http://rzdh.com/images/HLT-ZM-X1.jpg
Table of specifications and processing capacities:
Model (bandwidth in mm), Sludge concentration (0.5–5%), Power (KW), Weight (Kg), Installation dimensions (mm), Dry sludge processing capacity (kg/ds/h), Sludge inflow rate (m3/h), Moisture content of sludge cakes (%), Length, Width, Height, Outlet height:
HLT-ZM-X-300: 6, 150, 3, 0.675, 851, 1.04, 0, 0015, 0070, 0014, 0065
HLT-ZM-X-500: 20, 450, 9, 2.075, 851, 1.55, 0, 0017, 0090, 0014, 0070
HLT-ZM-X-750: 50, 120, 2.4, 5.075, 851, 1.57, 0, 0018, 0011, 0050, 0090
HLT-ZM-X-1000: 65, 150, 3.0, 7.075, 852, 2.0, 0, 0012, 0002, 0013, 0050, 0090
HLT-ZM-X-1500: 130, 300, 6.0, 14.75, 852, 2.5, 0, 0015, 0002, 0017, 0010, 0050
HLT-ZM-X-2000: 220, 500, 10, 22.75, 853, 2.0, 0, 0018, 0002, 0023, 0018, 0100
HLT-ZM-X-2500: 280, 650, 13, 28.75, 853, 2.2, 0, 0022, 0003, 0028, 0018, 0100
Application industries: Suitable for sludge treatment in factories of general scale as well as in small urban sewage treatment plants. Such as the automotive industry, coating, pharmaceuticals, electroplating, leather, textile industry, pulp and paper manufacturing, food industry, coal ash separation in power plants, and comprehensive wastewater treatment. HLT-ZM-Z series process flow: http://rzdh.com/images/HLT-ZM-Z.png Specifications and processing capacity table Model (bandwidth in mm) Sludge concentration 0.5–5% Power (KW) Weight (Kg) Installation dimensions (mm) Dry solids processing capacity (kg.ds/h) Sludge inflow rate (m3/h) Moisture content of sludge cake (%) Length Width Height Outlet height HLT-ZM-Z-300 7 35 1.0 3.0 75 85 1.5 500 185 075 0145 0650 HLT-ZM-Z-500 15 110 2.2 4.0 75 85 1.7 600 200 095 0150 0750 HLT-ZM-Z-750 25 150 3.0 5.0 75 85 2.2 880 0220 0120 0160 0750 HLT-ZM-Z-1000 35 180 3.6 8.0 75 85 2.5 1300 2450 1400 1750 0750 HLT-ZM-Z-1500 175 420** -1575 85 2.8 5170 02800 1700 1750 1000 HLT-ZM-Z-2000 130 600 12 2675 85 3.5 5225 03200 2300 1900 1000 HLT-ZM-Z-2500 165 780 15.6 -3375 85 3.8 5280 03500 2800 2000 1000 Application industries: Suitable for large-scale municipal sewage treatment, large factories, smelting plants, and projects with strict requirements regarding sludge moisture content. Such as the metallurgical industry, steel industry, water treatment plants, gas desulfurization, mine slurries, municipal sludge (primary sedimentation sludge, secondary sedimentation sludge, activated sludge, digested sludge), etc. http://rzdh.com/images/back02.jpg All rights reserved by Rizhao Dahua Fluid Control Co., Ltd. Address: Korea Industrial Park, Economic Development Zone, Rizhao City, Postal Code: 276826
HLT-ZM-Z series: http://rzdh.com/images/wn08325.jpg
Process flow for HLT-ZM-X series 1: http://rzdh.com/images/HLT-ZM-X.png
Process flow for HLT-ZM-X series 2: http://rzdh.com/images/HLT-ZM-X1.jpg
Table of specifications and processing capacities:
Model (bandwidth in mm), Sludge concentration (0.5–5%), Power (KW), Weight (Kg), Installation dimensions (mm), Dry sludge processing capacity (kg/ds/h), Sludge inflow rate (m3/h), Moisture content of sludge cakes (%), Length, Width, Height, Outlet height:
HLT-ZM-X-300: 6, 150, 3, 0.675, 851, 1.04, 0, 0015, 0070, 0014, 0065
HLT-ZM-X-500: 20, 450, 9, 2.075, 851, 1.55, 0, 0017, 0090, 0014, 0070
HLT-ZM-X-750: 50, 120, 2.4, 5.075, 851, 1.57, 0, 0018, 0011, 0050, 0090
HLT-ZM-X-1000: 65, 150, 3.0, 7.075, 852, 2.0, 0, 0012, 0002, 0013, 0050, 0090
HLT-ZM-X-1500: 130, 300, 6.0, 14.75, 852, 2.5, 0, 0015, 0002, 0017, 0010, 0050
HLT-ZM-X-2000: 220, 500, 10, 22.75, 853, 2.0, 0, 0018, 0002, 0023, 0018, 0100
HLT-ZM-X-2500: 280, 650, 13, 28.75, 853, 2.2, 0, 0022, 0003, 0028, 0018, 0100
Application industries: Suitable for sludge treatment in factories of general scale as well as in small urban sewage treatment plants. Such as the automotive industry, coating, pharmaceuticals, electroplating, leather, textile industry, pulp and paper manufacturing, food industry, coal ash separation in power plants, and comprehensive wastewater treatment. HLT-ZM-Z series process flow: http://rzdh.com/images/HLT-ZM-Z.png Specifications and processing capacity table Model (bandwidth in mm) Sludge concentration 0.5–5% Power (KW) Weight (Kg) Installation dimensions (mm) Dry solids processing capacity (kg.ds/h) Sludge inflow rate (m3/h) Moisture content of sludge cake (%) Length Width Height Outlet height HLT-ZM-Z-300 7 35 1.0 3.0 75 85 1.5 500 185 075 0145 0650 HLT-ZM-Z-500 15 110 2.2 4.0 75 85 1.7 600 200 095 0150 0750 HLT-ZM-Z-750 25 150 3.0 5.0 75 85 2.2 880 0220 0120 0160 0750 HLT-ZM-Z-1000 35 180 3.6 8.0 75 85 2.5 1300 2450 1400 1750 0750 HLT-ZM-Z-1500 175 420** -1575 85 2.8 5170 02800 1700 1750 1000 HLT-ZM-Z-2000 130 600 12 2675 85 3.5 5225 03200 2300 1900 1000 HLT-ZM-Z-2500 165 780 15.6 -3375 85 3.8 5280 03500 2800 2000 1000 Application industries: Suitable for large-scale municipal sewage treatment, large factories, smelting plants, and projects with strict requirements regarding sludge moisture content. Such as the metallurgical industry, steel industry, water treatment plants, gas desulfurization, mine slurries, municipal sludge (primary sedimentation sludge, secondary sedimentation sludge, activated sludge, digested sludge), etc. http://rzdh.com/images/back02.jpg All rights reserved by Rizhao Dahua Fluid Control Co., Ltd. Address: Korea Industrial Park, Economic Development Zone, Rizhao City, Postal Code: 276826