2015 **List of Model Technologies in Water Pollution Control (including technical specifications, application scope, case studies, etc.)**

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This post was last edited by yinkuilin6868 on 2015-12-18 09:07. Announcement on the Release of the 2015 **List of Advanced Pollution Control Demonstration Technologies (in the Field of Water Pollution Control) and **List of Environmental Protection Technologies Encouraged for Development (in the Field of Water Pollution Control) In order to implement the Environmental Protection Law of the People’s Republic of China and the Law of the People’s Republic of China on the Prevention and Control of Water Pollution, as well as to carry out the Guidelines of the State Council on Strengthening Key Environmental Protection Tasks (Guo Fa [2011] No. 35) and the Action Plan for the Prevention and Control of Water Pollution (Guo Fa [2015] No. 17), and to accelerate the demonstration, application, and dissemination of advanced pollution control technologies for environmental protection, our department has organized relevant entities to select a number of advanced water pollution control technologies. Based on these selections, the 2015 **List of Advanced Pollution Control Demonstration Technologies (in the Field of Water Pollution Control) and **List of Environmental Protection Technologies Encouraged for Development (in the Field of Water Pollution Control) have been compiled and are now being released. The technologies listed in the **Catalogue of Advanced Pollution Control Demonstration Technologies (in the field of water pollution control)** are innovative, feature advanced technical parameters and excellent treatment effects; they have basically reached the level suitable for practical engineering applications and thus possess engineering demonstration value. The technologies listed in the **“Catalogue of Environmental Protection Technologies to be Promoted (in the field of water pollution control)”** are proven mature technologies through engineering practices. They offer stable treatment effects and are economically reasonable and feasible; thus, their promotion and application are encouraged. 　　　　Attachments: 1. 2015 **List of Advanced Pollution Control Demonstration Technologies (in the field of water pollution control) 2. 2015 **List of Environmental Protection Technologies Encouraged for Development (in the field of water pollution control) Ministry of Environmental Protection, December 7, 2015 Issued by the General Office of the Ministry of Environmental Protection on December 8, 2015 Attachment 1: The technologies listed in the **List of Advanced Pollution Control Demonstration Technologies (in the field of water pollution control)** are innovative, feature advanced technical parameters and effective pollution control capabilities; they have basically reached the level suitable for practical engineering applications and thus possess value as models for such projects. 2015 **List of Advanced Pollution Control Demonstration Technologies (in the field of water pollution control)**
Serial Number | Technology Name | Process Route and Parameters | Key Technical Indicators | Scope of Application | Technical Features | Application Examples
1 | Air-lifted alternating circulation flow filter bed technology | Uses alternating air supply to create a circulating flow; air lift is employed to generate alternating circulation within four parallel filter beds filled with composite filter media, enabling simultaneous carbon and nitrogen removal through an aerated biological filter. The hydraulic retention time is 4–8 hours, and the volume load is 3–5 kg COD/(m3×day). The air-to-water ratio in the filter tank is 5:1, with a power consumption of 0.5 kWh per ton of water treated. The treatment of domestic sewage ensures that the effluent’s BOD, COD, and ammonia nitrogen levels meet the Grade 1A standards specified in the “Emission Standards for Pollutants from Urban Sewage Treatment Plants” (GB18918-2002). Treatment of domestic wastewater from rural and urban areas as well as hospital wastewater, and reuse of treated water. Composed of four submerged biological filters working as a single unit, it provides both an oxygen source and the driving force for circulation, thereby reducing energy consumption ； Alternating A/O is implemented in different filters to meet denitrification requirements, without the need for recirculation. Wastewater treatment project for domestic wastewater at a rate of 600 t/d in residential communities in the southern part of Ma’anshan, along the river, intended to handle wastewater generated as a result of industrial relocation. 2. The technology of enhancing ozone oxidation for advanced wastewater treatment via an electromagnetic shear field involves adding ozone to an electromagnetic shear field generator; this results in the generation of extremely high-amplitude current pulses in the wastewater, leading to the formation of hydroxyl radicals, while also increasing the solubility of ozone ； Then it enters the ozone catalytic oxidation reactor, where the pollutants are subjected to efficient catalytic oxidation ； Finally, biochemical treatment is carried out using an aerated biological filter. Influent CODCr: 150 mg/L, SS: <10 mg/L ； The effluent has CODCr < 50 mg/L and SS < 10 mg/L. Advanced treatment of soluble, refractory organic pollutants in wastewater from industries such as pharmaceuticals and chemicals. The effect of ozone oxidation was enhanced using electromagnetic shear field technology, improving the degradation and removal of biodegradably difficult organic compounds. The First Branch of Hebei Province Installation Engineering Company: Advanced catalytic oxidation treatment project for the 600,000 t/d Shijiazhuang Qiaodong sewage treatment plant. The technology for advanced treatment of pharmaceutical wastewater using ozone catalytic oxidation involves sending the wastewater from the biochemical treatment unit to an ozone oxidation reactor equipped with dual-functional catalysts, where ozone-catalyzed oxidation takes place; thereafter, the wastewater is subjected to biological treatment (a combination of micro-oxygen hydrolysis and aerobic MBBR processes), and after flocculation and sedimentation, the treated water is discharged. Among them, the ozone dosage is 30–50 mg/L, the residence time in the ozone reactor is 15 minutes, and the power consumption is 0.5–1.0 kWh. Inlet COD < 400 mg/L, colority < 300 times, ** < 0.042 mg/L ； The COD of the effluent is <80 mg/L (with the addition of the Fenton oxidation process, the COD can be reduced by 50 mg/L), the color intensity is <5 times, and it is **<0.01 mg/L. Advanced treatment of biopharmaceutical wastewater containing β-lactam antibiotics. The efficient catalytic ozone oxidation + micro-oxygen hydrolysis process effectively improved the biodegradability of wastewater. Dow Chemical’s 3,000 t/d antibiotic wastewater advanced treatment project in Yushu, Jilin: Catalytic treatment method. 4. Short-path anaerobic ammonia oxidation denitrification technology for high-ammonia-nitrogen organic wastewater: This technology consists of three treatment units; the wastewater first passes through the first unit, where part of the ammonia nitrogen is converted into nitrite nitrogen, after which it enters the second unit. There, ammonia nitrogen and nitrite nitrogen are transformed into nitrogen gas under the action of anaerobic ammonia-oxidizing bacteria. Finally, the wastewater enters the third unit, where partial nitrification occurs to achieve biological denitrification. Influent NH3-N: 500 mg/L, CODCr: ≤1200 mg/L, BOD5: ≤500 mg/L ； The effluent NH3-N is ≤20mg/L, CODCr is ≤100mg/L, and BOD5 is ≤20mg/L. Treatment of high-concentration organic wastewater with high ammonia nitrogen from bio-fermentation industries such as protein production, food additives manufacturing, and pharmaceutical production. Through the oxidation by anaerobic ammonium-oxidizing bacteria, the energy consumption for external aeration is significantly reduced, and ammonia nitrogen and organic matter in water are effectively removed without the need to add an external carbon source. Ningxia Yipin Bioengineering Co., Ltd.’s 10,000 t/d corn deep-processing wastewater treatment project: The wastewater containing heavy metals such as copper and nickel is first adjusted in terms of consistency and quantity, and solid particulate impurities are removed through filtration. Subsequently, this wastewater flows into an ion exchange fiber adsorption system. The concentration of heavy metal ions in the treated water meets the requirements specified in the \"Emission Standards for Pollutants from Electroplating\" (GB21900-2008), allowing it to be reused in production processes or sent to comprehensive wastewater treatment systems. After being saturated with adsorption, ion exchange fibers can be regenerated. Chemicals are added to the regenerated concentrated solution, and the filter cake resulting from precipitation and filtration is reused; the filtrate is then sent back for further treatment. Copper-containing wastewater: The total copper content in the influent is 142 mg/L; after treatment, it drops to 0.256 mg/L. The copper recovery rate can exceed 98%. Nickel-containing wastewater: the total nickel concentration in the inlet water was 84.4 mg/L, while it dropped to 0.010 mg/L after treatment; the nickel recovery rate could exceed 99%. Treatment and resource utilization of heavy metal wastewater (non-chelated wastewater) from printed circuit boards. It utilizes fibrous ion exchange materials, which feature a large surface area and rapid adsorption-desorption rates. Jiangsu Yangtai Electronics Co., Ltd.’s 1260t/d PCB heavy-metal wastewater treatment project: An integrated membrane desalination and reuse treatment technology for coking wastewater, which involves using the Fenton oxidation process to oxidize organic substances in the biologically treated coking wastewater, followed by pre-desalination through electrodialysis. The resulting water is then further desalinated and reused through ultrafiltration and reverse osmosis. The concentrated waste streams from reverse osmosis and electrodialysis pre-desalination are further processed using concentrated electrodialysis to produce more water while concentrating the waste. The desalinated water is reused as makeup water for the circulating cooling water; the concentrate from electrodialysis must be treated separately. Influent CODCr ≤ 300 mg/L, calcium hardness (expressed as CaCO3) ≤ 250 mg/L, Cl- ≤ 750 mg/L, TDS ≤ 3500 mg/L, NH3-N ≤ 20 mg/L ； The CODCr of the treated effluent is ≤20 mg/L, calcium hardness is ≤150 mg/L, Cl- is ≤30 mg/L, TDS is ≤200 mg/L, and NH3-N is ≤2 mg/L. The overall water production rate of the system can reach 85%. Advanced treatment and reuse of coking wastewater. Use the Fenton process to oxidize organic matter and reduce subsequent membrane fouling ； The “electrodialysis + reverse osmosis” combination process is used as a deep desalination method; electrodialysis is employed for pre-desalination to reduce the levels of calcium and magnesium, thereby slowing down membrane fouling later on ； The water recovery rate is further improved by concentrating the reverse osmosis concentrate through electrodialysis. The project for the advanced treatment and reuse of 16,560 tons/day of non-degradable saline organic wastewater at Qian’an Sinochem Coal Chemical Co., Ltd. involves a neutralization + membrane filtration process for treating pickling wastewater in the steel industry. First, the pickling wastewater is pre-neutralized with limestone to adjust its pH to 5–6; then lime is added to further neutralize it to a pH of 8–9. In this process, iron ions in the wastewater react with the alkaline solution to form precipitate mixtures such as iron hydroxide and zinc hydroxide. Subsequently, solid-liquid separation is carried out using tubular membranes, resulting in treated water that meets discharge standards. Influent CODCr: 200 mg/L, TP: 35 mg/L, total iron: 350 mg/L, pH: 2, SS: 300 mg/L ； The effluent CODCr level is 15.2 mg/L, TP is 0.45 mg/L, total iron is 0.05 mg/L, the pH value ranges from 6 to 9, and no SS was detected. Treatment of pickling wastewater in the steel industry. Two-step neutralization using lime and lime milk ensures accurate dosing, low treatment costs, and simple management ； Adopt tubular membrane solid-liquid separation equipment to improve separation efficiency. Tianjin Metallurgical Group Zhongxing Shengda Steel Industry Co., Ltd.: 7200 m3/d treatment and reuse project for pickling wastewater in the steel industry. 8. Treatment of heavy metals in acidic waste gases from smelting, as well as ammonium perrhenate enrichment technology: Special chelating agents are added to the acidic waste gas containing 5%–10% acid generated during acid production from smelting gases; this enables heavy metal ions and arsenic to react rapidly with these agents inside a reactor, after which solid-liquid separation is carried out using a plate and frame filter press. The filtrate can be returned to the power wave washing system for reuse, or it can be used as a supplement for dilute acid. The filter cake can be recycled to extract valuable metals (ammonium rhenate) or shipped out for disposal. Influent arsenic: 1000 mg/L; copper: 42.75–156.15 mg/L ； Arsenic in the effluent is <0.5 mg/L, and copper is <0.1 mg/L. The removal rates of lead and cadmium also exceed 90%. Treatment of acid-containing waste acid with 5%–10% acid produced from the production of acid from smelting flue gas, as well as acidic wastewater from non-ferrous metallurgy (mining and smelting). By using specialized chelating agents and rapid reactors, a rapid reaction is induced under strong acidic conditions to produce precipitates; the reagents do not undergo chelation reactions with alkaline earth metals such as calcium present in the acidic waste, resulting in reduced sludge production. Zero discharge of acidic waste has been achieved. In the industrial renovation project for copper and arsenic removal from wastewater generated during the production of sulfuric acid from smelting flue gas at Jinchuan Group Co., Ltd. (30 m³/h capacity), the electrochemical treatment technology for circulating cooling water is employed. Through electrochemical reactions, a reduction reaction occurs in the water near the inner wall of the reaction chamber (cathode). The scale-forming substances in the water precipitate and adhere to this inner wall. Regular removal of this deposited scale helps maintain the balance of the quality of the circulating water ； Near the electrode (anode), chloride ions in water undergo an oxidation reaction to produce free chlorine (≥0.8 mg/L), OH−, and other substances, thereby continuously controlling the growth of bacteria and algae in the system. Control parameters for circulating water: turbidity ≤ 20 mg/L, pH value 8.0–8.5, conductivity ≤ 5000 μs/cm, Cl- ≤ 1000 mg/L, calcium hardness (expressed as CaCO3) ≤ 850 mg/L, total alkalinity (expressed as CaCO3) ≤ 300 mg/L, total iron ≤ 1.0 mg/L, copper ions ≤ 100 μg/L. Treatment of fresh water circulating cooling water. There is no need to add chemical scale inhibitors, corrosion inhibitors, or biocides ； It reduces the secondary pollution caused by the discharge of wastewater from traditional recirculating water systems. The electrochemical treatment project for the circulating cooling water in the 3,000 m³/h PPE system at the Ruicheng Branch of BlueStar Chemical New Materials Co., Ltd. This technology involves a combined process of physical-chemical pretreatment and biological denitrification to treat wastewater generated from coal-based ammonia synthesis. It utilizes an integrated “pretreatment + biological treatment” approach for treating such industrial wastewater. The physicochemical pretreatment involves a combined process of copper-catalyzed internal iron electrolysis + soda softening + ferrous sulfate desulfurization + sodium hypochlorite oxidation for cyanide destruction + flocculation and sedimentation + air stripping for ammonia removal. Biological nitrogen removal employs an EGSB+A/O combined process, with the effluent undergoing further advanced treatment via activated carbon adsorption. EGSB retention time: 12 h ； The retention time in tank A is 8 hours. The sludge load in tank O is 0.12 kg BOD5/(kg MLSS×day) and 0.04 kg NH3-N/(kg MLSS×day), with a sludge concentration of 4 g MLSS/L. The COD of the incoming water is 3000–4000 mg/L, total nitrogen is 3000 mg/L, and ammonia nitrogen is 2500 mg/L ； The COD of the effluent is 50 mg/L, total nitrogen is 25 mg/L, and ammonia nitrogen is 15 mg/L. Treatment of coal-based ammonia synthesis wastewater. Improving biodegradability using copper-catalyzed zero-valent iron internal electrolysis ； Ferrous sulfate is used to precipitate sulfide ions, while sodium hypochlorite is used to oxidize cyanides, thereby reducing the impact of sulfides and ** on subsequent biochemical treatment. Huajiang Chemical Engineering Group Co., Ltd.’s 8,000 m3/d ammonia synthesis wastewater treatment project with high ammonia nitrogen content: The water-coal slurry gasification technology is used to treat high-concentration organic wastewater. In this process, the wastewater, along with insoluble solids and water-soluble solids, is mixed and its pH is adjusted to form a suspension; additives are then added to create a slurry. This slurry is combined with raw coal, carbon black, etc. in certain proportions and ground to produce water-coal slurry (with a concentration of 50%–60%). This slurry, along with compressed pure oxygen, is injected into a gasifier where it undergoes gasification, melting, and cracking. The carbon black and water separated from this process are either reused in the slurry production process or sent to a wastewater treatment system for further processing before being discharged in compliance with regulations. The resulting water-gas mixture is purified and transformed before being fed into the ammonia synthesis system. Influent COD: 200,000 mg/L, ammonia nitrogen: 5,000 mg/L ； The COD of the effluent is ≤50 mg/L, and ammonia nitrogen is ≤20 mg/L. Treatment of hazardous waste such as distillation and reaction residues, mother liquors, reaction substrates or media, distillation residues, and waste organic solvents in industries like pharmaceutical production, fine chemicals, and synthetic leather ； Requirements for inlet water parameters: Cl- ≤ 5000 mg/L, with virtually no heavy metals. Using coal water slurry gasification technology to treat high-concentration organic waste liquids ； Appropriate water-coal slurry additives can be selected depending on the type of waste liquid ； Reduce the production cost of synthetic ammonia. Zhejiang Fengdeng Chemical Co., Ltd. utilizes coal water slurry technology for the treatment of high-concentration wastewater in its ammonia synthesis production process. The catalytic reduction method for the pretreatment of industrial wastewater containing organic chlorides involves the use of equipment that combines functions such as mixing, reduction reactions, solid-liquid separation, and clarification. Iron-based bimetallic compounds are used as reducing agents, while soluble inorganic salt anions serve as catalysts; under acidic conditions, these substances are used to catalytically reduce and dechlorinate the organic chlorides present in the wastewater. The effluent enters the subsequent biochemical treatment process for further treatment. Depending on the dechlorination requirements, 1 to 3 stages can be set. The system hydraulic retention time is 12–36 hours, and the amount of reducing agent, ferroalloy powder, used is 1–3 kg/m3. Inlet trichloroethylene: 28 mg/L, tetrachloroethane: 239.3 mg/L ； The concentration of trichloroethylene in the effluent was 0.26 mg/L, while tetrachloroethane was not detected. Pretreatment of industrial wastewater containing organic chlorides. Use inexpensive and readily available ferroalloy waste as a reducing agent ； Tower-type reaction equipment features a compact structure and occupies little space. The 120 m³/d trichloroethylene wastewater dechlorination project at the Electrochemical Plant of Zhejiang Juhua Co., Ltd. The technology for treating high-salinity wastewater using a mechanical atomization evaporator: This mechanical atomization evaporator consists of an evaporation nozzle, a water supply system, and an electrical control system. The wastewater is pressurized and sprayed at high speed; it is then broken into water droplets with sizes of 100–400 μm by special impellers, before being thrown into the air to enable evaporation ； At the same time, the reasonable range of droplet drift is controlled to avoid affecting the environment surrounding the evaporation pond. The evaporation capacity of a single evaporator is 6–10 tons of wastewater per hour. The average annual evaporation rate can reach 50%, with a power consumption of 4 kWh per ton of water. Its service life is 10 years. During the operation of the project, the TSP concentration in the surrounding atmospheric environment meets the limit values for uncontrolled emissions specified in the “Integrated Emission Standard for Air Pollutants” (GB 16297-1996). Enhanced evaporation of concentrated brine (with low concentrations of volatile pollutants) in evaporation ponds in arid regions of the north and northwest. A mechanical crushing impeller is used to achieve multiple breaks and dispersals of water droplets, thereby enhancing the evaporation effect. Inner Mongolia Dalat Economic Development Zone Management Committee: 190 m3/d mechanical atomization evaporation project for high-salt wastewater in industrial parks; 14. Intermetallic compound membrane filtration technology for improving the quality of sludge and phosphorus. This technology is a membrane filtration method based on intermetallic compound membranes, and it combines five systems: a filtration and purification system, a backwashing system, an anti-scaling and clogging system, a residue treatment system, and a control system. The sludge and phosphorus pass through high-precision filtration membranes into the liquid phase, after which yellow phosphorus is recovered through crystallization in that liquid phase. The filtration temperature should be maintained above 70°C, the filtration pressure must not exceed 0.35 MPa, and the average filtration flux for yellow phosphorus should be greater than 100 kg/(m2×h). The recovery rate of yellow phosphorus from the sludge phosphorus is >99%, the phosphorus content in the waste discharged by the system is <1%, and the quality of the recovered yellow phosphorus meets the quality requirements for first-class products as specified in \"Industrial Yellow Phosphorus\" (GB7816-1998). Improvement of the quality of sludge phosphorus in the yellow phosphorus production process. The key filtration unit uses Ti-based intermetallic compound membrane filtration materials, which are capable of handling the filtration of highly viscous and high-concentration sludge phosphorus liquids, achieving a high phosphorus recovery rate ； The recovery technology utilizes cyclic washing micro-terminals and micro-counterflow filtration to address the filterability issue of sludge phosphorus ； The processing process features online, efficient backwashing and pollution-free slag discharge, while the production equipment enables fully enclosed, safe, and environmentally friendly operation. Sichuan ChuanTou Chemical Industry Group Co., Ltd.’s Sludge Phosphorus Improvement and Recovery Project: 15. Biological leaching method for advanced dewatering of sludge and removal of heavy metals. The concentrated sludge is fed into a biological leaching tank, where specialized microorganisms are added to carry out sludge modification reactions; subsequent plate and frame filtration is used to enable the resource utilization of the dewatered sludge. When the heavy metal content in the sludge exceeds the allowable levels, the process parameters can be adjusted to transfer these heavy metals into the liquid phase, where they can be precipitated and recovered by adding chemicals such as lime milk or sulfides. Biological leaching tank retention time: 48 hours for municipal sewage sludge, 24–48 hours for industrial wastewater sludge ； The surface load is generally 8 m3/(m2×h). 1) The moisture content of the incoming sludge was 78.3%, and after biological leaching, it dropped to 57.9% ； 2) The pH of the sludge entering was 6.88, and it dropped to 5.14 after biological leaching ； 3) Organic matter in the influent sludge: 48.3%, 46.3% after biological leaching; 4) E. coli count in the influent sludge feces: 0.01 ； 5) After biological leaching, the mortality rate of worm eggs >95%, and the removal rate >95% ； 6) The concentrations of heavy metals Cu, Zn, Pb, Cd, Cr, Hg, and As in the sludge were 213 mg/kg, 736 mg/kg, 67 mg/kg, 2.2 mg/kg, 567 mg/kg, 9.0 mg/kg, and 27 mg/kg respectively; after biological leaching, they were 139 mg/kg, 229 mg/kg, 55 mg/kg, 1.2 mg/kg, 234 mg/kg, 4.8 mg/kg, and 11.7 mg/kg respectively. Sludge treatment in municipal sewage treatment plants, sludge treatment in the leather and printing industries, sludge treatment in the pharmaceutical, papermaking, and chemical industries. The favorable microbial community formed for biological leaching releases certain acidic substances, which significantly inactivate the existing heterotrophic bacteria and pathogenic microorganisms in the sludge; meanwhile, the organic matter content in the sludge remains essentially unchanged ； The extracellular polymers (EPS) secreted by this microorganism are highly hydrophilic, accounting for 1/10 of those in conventional activated sludge; moreover, in acidic environments the Zeta potential of the sludge particles approaches 0, **which improves the sedimentation and dewatering properties of the sludge. Harbin Longjiang Environmental Protection Group Co., Ltd.’s 1000t/d sludge biological leaching and advanced dewatering project employs a treatment and disposal technology for organic solid waste and sludge from 16 cities, based on the process route of \"high-temperature hydrolysis + high-concentration anaerobic digestion + high-dryness dewatering + waste heat drying + comprehensive utilization of biogas + use of biochar in soil applications\". 1) High-temperature hydrolysis technology: Steam at 170°C and 0.7 MPa is used as the heat source; a rotary hydrolysis reactor is employed, with a reaction time of 30 minutes, after which the mixture enters a flash tank. 2) High-concentration anaerobic digestion technology: The material with a solid content of 9%–12% after hot hydrolysis treatment is fed into an anaerobic reactor at 40°C for digestion; the residence time is 11–14 days, the volume load is 5.6 kg/(m3·d), the degradation rate of organic matter is greater than 60%, the gas production rate is over 2 m3/(m3·d), and the hydrogen sulfide level in the biogas is below 200 ppm. 3) High-solid-content dewatering technology: Magnesium salts are added to the digestate to form struvite, followed by centrifugal dewatering; nitrogen and phosphorus can be recovered from this process. The chemical consumption is 5‰, and the solid content of the sludge after dewatering is over 35%. 4) Waste heat drying technology: Utilizes waste heat from the entire system as well as solar radiation heat as heat sources for low-temperature drying. Thermal energy is recovered and utilized in a hierarchical manner throughout the plant to reduce overall energy consumption. 5) Application of biochar soil: Dried biogas sludge is a slow-release fertilizer used in landscaping and flower cultivation. 6) Comprehensive utilization of biogas: Purified and compressed biogas is used in urban transportation fueling stations or for biogas power generation. The degradation rate of organic matter can exceed 60%, sludge reduction can be over 80%, and the sterilization rate is 100%. Compared with traditional anaerobic digestion, the total project investment is reduced by 10%–20%, operating costs are lowered by 12%–30%, and biogas production is doubled. Comprehensive treatment and disposal of organic solid wastes such as municipal sludge and kitchen waste. High-temperature hydrolysis pretreatment is employed to increase the biogas yield from subsequent anaerobic digestion and improve sludge dewatering performance ； Low-speed rotary reaction tanks can prevent wear on the equipment caused by sediment in the sludge ； High-speed centrifugal dewatering is used, achieving a solid content of over 35% ； Waste heat is utilized in combination with solar drying to reduce the system’s energy consumption. Hubei Guoxin Tianhui Energy Co., Ltd.’s 300t/d sewage treatment plant – sludge comprehensive treatment and disposal project: A technology for treating sludge and utilizing it as a resource through microbial protein extraction. The dewatered sludge is preheated and then subjected to a hydrolysis reaction; after hydrolysis, the sludge passes through a flash vaporization device to have its pressure reduced and heat exchanged. It is then fed into a plate and frame filter for solid-liquid separation. The protein-containing supernatant is concentrated and purified to produce protein-rich products, which can be used to manufacture protein-based foaming agents, fire extinguishants, etc ； Sludge residue can be used as landscaping soil, organic fertilizer, building materials, etc. Adjust the moisture content of the sludge in the preheating tank to 86%–90% ； Hydrolysis residence time: 4–6 hours ； The moisture content of the sludge residue after solid-liquid separation is reduced to below 40%. The moisture content of the sludge entering the treatment process is 80%; after treatment it drops to 35%–40%. All pathogenic bacteria are eliminated, and the organic matter content is reduced by more than 40%. Treatment of sludge from municipal wastewater treatment plants; combined treatment of sludge with organic solid wastes such as food waste and livestock manure; treatment of residues from biological fermentation and pharmaceutical mycelium. This technology can extract proteins and produce protein by-products; it requires relatively low investment, has low overall operating costs, occupies little space, and features a safe and reliable process. Tianjin Yuchuan Microbial Products Co., Ltd.’s project on sludge treatment and resource utilization through protein extraction at a rate of 300 t/d; Physical modification technology for using sludge in the production of degraded plastics. This technology involves first composting and drying the sludge, using the resulting harmless sludge as the main raw material (with a mass fraction of ≥51%), along with additives and fillers. These materials are then mixed in appropriate proportions according to specific requirements. Subsequently, the mixture is fed into modification melters and granulators, where the molecules are modified, melted, disinfected, copolymerized, and plasticized, ultimately resulting in sludge-based plastic particles through extrusion and granulation. Sludge plastic particles can be processed to produce various sludge plastic products. The moisture content of dried sludge is ≤20%, while the sludge content in plastic products ranges from 51% to 80%. Sludge from printing and dyeing wastewater, as well as sludge from agricultural solid waste, are used to produce sludge plastic. Melting, modification, and disinfection of sludge and additives are achieved under high temperature and pressure, addressing the compatibility issues between sludge and other materials. Zhejiang Lvtian Environmental Engineering Co., Ltd.’s 100 t/d sludge plastic particle and product production and processing project. Note: 1. This catalog is subject to its latest version; upon the release of the next version of this catalog in this field, the contents of this catalog shall become invalid ； 2. For details on application cases, please visit the website of the China Environmental Protection Industry Association (http://www.caepi.org.cn).