Company/Organization Profile

Yan’an CECEP Sewage Treatment Co., Ltd. was founded in December 2019. It is a third tier subsidiary of China Energy Conservation and Environmental Protection Group, with a registered capital of RMB 184.25 million. The company undertakes the investment, construction and operation of the PPP Project for Phase-Ⅱof Yaodian Wastewater Treatment Plant and its supporting pipe network in Yan’an City. As a key component of the ecological conservation of the Yanhe River within the Yellow River Basin, the project is designed with a wastewater treatment capacity of 25,000 m³/d and a water quality upgrading capacity of 50,000 m³/d. Since its establishment, the company has vigorously inherited and carried forward the Yan’an Spirit, actively implemented the “Dual Carbon” Strategy, and strived to build a green and low carbon benchmark enterprise integrating water pollution control, energy conservation and carbon reduction, resource recycling and environmental protection science popularization.

机构简介

延安中节能污水处理有限公司成立于2019年12月，系中国节能旗下三级子企业，注册资本金18425万元，负责延安市姚店污水处理厂二期及配套管网PPP项目投资、建设与运营。本项目为黄河流域延河生态保护重要一环，设计污水处理规模2.5万m³/d、水质提标规模5万m³/d。公司成立以来，大力传承和弘扬延安精神，积极践行“双碳”战略，致力于打造集水污染治理、节能降碳、资源再生利用与环保科普于一体的绿色低碳标杆企业。

Project Overview

Wastewater treatment is a typical energy intensive industry. Traditional water utilities are generally faced with high level energy and reagent consumption, substantial carbon emissions, single function plant premises dedicated merely to production and operation, low utilization rate of renewable resources, slow progress in digita intelligent transformation, and insufficient exploitation of the value of green spaces and the science popularization function of environmental protection facilities.

Located alongside the Yanhe River, a primary tributary of the Yellow River, the Phase-Ⅱ Project of Yaodian Wastewater Treatment Plant constitutes an important component of the strategy for ecological conservation and high quality development of the Yellow River Basin. Guided by Xi Jinping’s Thought on Ecological Civilization, the company actively responds to the national strategic plans for building a Beautiful China and advancing the “Dual Carbon” goals. Taking full advantage of its existing production and operation space and adhering to the principle of “prioritizing the utilization of existing resources”, it adopts a two pronged driving strategy of spatial operation optimization and innovative technology application. Committed to advancing the synergistic enhancement of pollution reduction and carbon mitigation and advocating green and low carbon production and lifestyle patterns, the company has identified such work as one of its core priorities. The chief business executive assumes overall responsibility, while the Production and R&D Department takes the lead. Through lean management, greenpower substitution, resource recycling, science popularization publicity and education and other measures, the plant has been upgraded from a conventional single purpose production oriented site into a multifunctional green space integrating wastewater treatment, on site green power generation and consumption, resource recycling and ecological science popularization. The company strives to build a model for water sector enterprises across the Yellow River Basin in developing green spaces. In 2024, it was recognized as one of the first batch green and low carbon benchmark wastewater treatment plants selected by the National Development and Reform Commission and the Ministry of Housing and Urban Rural Development.

项目背景

污水处理是典型的能源密集型行业，传统水务企业普遍存在能耗药耗高、碳排放量大、厂区空间功能单一（生产运行）、可再生资源利用率低、数智化转型进展缓慢、绿色空间价值与环保设施科普功能未能充分释放等问题。

姚店污水处理厂二期项目地处黄河一级支流延河之畔，是黄河流域生态保护和高质量发展战略的重要组成部分。公司深入学习贯彻习近平生态文明思想，积极响应美丽中国建设与“双碳”国家战略部署，立足企业既有生产运营空间，坚持“优先使用既有资源”原则，以空间运营优化和创新技术应用双轮驱动，致力于减污降碳协同增效，倡导绿色低碳生产生活方式，并作为公司重点任务。公司第一经营责任人总负责、生产研发部门牵头，通过精益管理、绿电替代、资源循环利用、科普宣教等，将传统单一生产型厂区升级为集污水处理、绿电产用、资源循环、生态科普于一体的复合型绿色空间，倾力打造黄河流域水务企业绿色空间使用者行动样板，2024年获评国家发改委和住建部首批绿色低碳标杆水厂。

Project Implementation

(I) Smart Water Services and Scientific Technological Innovation Empower the Optimization of Plant wide Operation

To improve management efficiency and continuously reduce energy and reagent consumption, the company has established a smart water management and control platform and developed intelligent chemical dosing and aeration systems. Online sensors are deployed to collect real time data including water quality and dissolved oxygen, so that aeration volume and chemical dosage can be adjusted automatically. This has realized the transformation from“manual experience based operation”to“data driven closed loop regulation”.

Renovation of water and air backwashing for secondary sedimentation tanks has been carried out simultaneously. Reclaimed water is used as the flushing water source and surplus air from biochemical tank blowers serves as the air source, improving the efficiency of sedimentation and sludge discharge. The surplus air volume from biochemical tank blowers is precisely diverted to the aerated grit chamber as stirring air, which allows two low efficiency Roots blowers to be shut down. This measure cuts electricity expenses and reduces noise pollution at the same time.

Renovation for unattended (low staff on site) operation has been completed, delivering an unattended operation mode with integrated central monitoring, IoT data acquisition and access, as well as automatic and intelligent operational control. It enhances operational efficiency and safety and lowers operating costs.

(II) Distributed Photovoltaic Power Generation Unlocks the Greenelectricity Value of Plant site Space

To increase the proportion of renewable energy consumed on site, the company has built a 776 kW distributed photovoltaic (PV) power system on building rooftops, above the effluent metering flume and on the ceiling of the underpass. Photovoltaic glass and flexible PV materials are innovatively adopted to adapt to existing spaces, achieving the operation mode of “self consumption of on site generated power with surplus electricity fed into the grid”. The system produces approximately 1,000,000 kWh of green power annually, meeting around 23% of the plant’s electricity demand.

An integrated parking lot featuring“photovoltaic power generation, sun shading and charging functions”has been constructed in front of the office building, with four new energy vehicle charging stations powered by the PV system to support simultaneous charging for eight new energy vehicles. The company has rolled out an incentive policy for“Green Power and Green Commuting”. Employees commuting by new energy vehicles are entitled to free charging, which saves about RMB 10,000 of fuel cost per vehicle each year and cuts carbon dioxide emissions by approximately 3.74 tons. A PV lit sports court has also been built to provide lighting for staff recreation and fitness activities.

(III) Recycling of Reclaimed Water Expands Application Scenarios of Spatial Resources

The company is equipped with reclaimed water delivery facilities with a daily conveyance capacity of 40,000 m³ and a 5.3 kilometer long main reclaimed water pipeline network, enabling timely supply of reclaimed water in response to user demands.

Reclaimed water, instead of tap water, is fully used for plant greening, road washing, production related chemical preparation and toilet flushing, saving roughly RMB 300,000 in tap water expenses every year. The remaining reclaimed water is discharged into the Yanhe River as ecological water replenishment, contributing to water quality improvement of the Yanhe River and better ambient water environment in surrounding areas.

(IV) Science popularization and Education Base Gives Full Play to the Social Value of Plant site Space

Deepening government enterprise cooperation, the company has worked with local ecological environment authorities to build a high standard water ecology and environmental protection science popularization and education base. Taking the cultural corridor inside the underpass as the core carrier, supplemented by display boards along roads and reclaimed water landscapes, the base covers an exhibition area of over 1,000 square meters. Its exhibition is divided into five sections: Ideological Guidance, Strategic Practice, Exemplary Force, Global Action and Industrial Exchange.

It integrates multiple dimensions: urban functions and public participation, environmental protection science popularization and local achievements, on site facilities and surrounding landforms, corporate publicity and public welfare projects, guidance by ecological environment authorities and social volunteer services, as well as communication conducted by central SOEs and local governments.

Open to the general public, primary and secondary school students and water industry practitioners on a regular basis, the base is staffed by a four member volunteer presentation team. It has been incorporated into research visit programmes for “Two Representatives and One Committee Member”, peer enterprise exchanges and primary and secondary school research and study activities. In June 2024, the base hosted the main venue event for World Environment Day organized by the local government.

项目实施

（一）智慧水务与科技创新赋能空间运营优化。为提高管理效率、不断压降能耗药耗，公司搭建智慧水务管控平台，研发智能加药、智能曝气系统，依托在线传感器实时采集水质、溶解氧等数据，自动调节曝气量与药剂投加量，实现从“人工经验操作”向“数据驱动闭环调控”转型。同步实施二沉池水、气反冲洗改造，以再生水为冲洗水源、生化池风机富余风量为气源，提升沉淀和排泥效能。利用生化池风机富余风量精准分配至曝气沉砂作为搅拌气源，关停两台低效罗茨风机，节约电费的同时减少了噪音污染。实施无人（少人）值守改造，实现了一体化中央监控、物联网采集接入、自动化智能化运行控制的无人值守运行模式，提高运行效率和安全性，降低运营成本。

（二）分布式光伏发挥厂区空间绿电价值。为提升绿色能源使用比例，公司在建筑物屋顶、出水计量槽上部及下穿通道顶棚建设776kW分布式光伏发电系统，创新采用光伏玻璃、柔性光伏材料适配既有空间，实现“自发自用、余电上网”，年均产出绿电约100万kWh，满足厂区约23%用电需求。办公楼前建成集“光伏、遮阳、充电”一体化停车场，安装4个新能源汽车充电桩，由光伏电站供电，可同时满足8辆新能源汽车同时充电。公司出台“绿电绿行”激励政策，驾驶新能源车通勤的职工可免费充电，每年每车节约燃油费约1万元、减排二氧化碳约3.74吨。设置光伏发电灯光球场，满足员工娱乐健身照明需求。

（三）再生水循环利用拓展空间资源应用场景。公司建有日输送能力4万m³的回用水设施，敷设再生水主管网5.3km，根据用户需求，可及时输送再生水。厂区绿化、道路冲洗、生产配药、冲厕等全部使用再生水替代自来水，年节约自来水费约30万元；剩余再生水排入延河进行生态补水，助力延河水质提升和周边水环境质量改善。

（四）科普宣教基地释放空间社会价值。公司深化政企合作，联合属地生态环境部门，以下穿通道文化长廊为主要载体，辅以道路两侧宣传展板和再生水景观，高标准建成水生态环保宣教科普基地，展示面积1000余平方米，分为“思想引领、战略实践、榜样力量、全球行动、行业交流”五大篇章，融合“城市功能与公众参与、环保科普与地方成就、场内点位与周边地貌、企业宣传与公益项目、生态环保部门带动与社会志愿服务、国资央企与地方政府传播”为一体，向社会公众、中小学生、行业从业人员常态化开放，并组建4人宣讲团队义务讲解。现已纳入延安“两代表一委员”调研、同行业交流、中小学研学范畴，其中，2024年6月，承担地方政府组织的“六·五”环境日主场活动。

Project Outcome

Remarkable Achievements in Smart and Low carbon Operation With the deployment of the smart water management platform and unattended operation system, intelligent automatic control of aeration and chemical dosing has been realized. The electricity and reagent consumption per ton of wastewater have declined year by year, which substantially cuts overall carbon emissions and improves management efficiency continuously. The quality of effluent water is far better than Level A criteria specified in Integrated Discharge Standard of Pollutants for Wastewater in the Yellow River Basin of Shaanxi Province, with a 100 percent compliance rate for all indicators.

Notable Benefits Brought by Green power Substitution and Low carbon Commuting Approximately 1,000,000 kWh of on site photovoltaic green power is consumed annually, delivering an annual carbon dioxide emission reduction of around 99.7 tons. The“Green Power & Green Commuting”incentive policy has spurred a rapid increase in new energy vehicles among employees. This initiative saves roughly RMB 160,000 in fuel costs each year, reduces fossil energy consumption by about 28 tons, and cuts carbon dioxide emissions by approximately 60 tons annually, creating a virtuous cycle of“green power generation consumption and low carbon travel”.

Innovative Green space Utilization Model with Deep rooted Low carbon Awareness Through publicity of green low carbon policies, target setting and project implementation, the company has transformed the conventional single function production oriented wastewater treatment plant into a multi functional green space integrating pollution control, green energy generation and consumption, resource recycling, and ecological science popularization and education. The upgrading is completed on the basis of existing plant premises without additional construction land, relying on operational optimization and technological innovation, so as to realize multi dimensional improvement of space value. The concept of green and low carbon production and lifestyle has taken deep root among all staff and become their conscious code of conduct.

Highly Replicable and Promotable Model The project does not rely on special site conditions or massive new investment and can be implemented within existing plant areas. After years of exploration and improvement, the company has basically established a green low carbon development model targeting synergistic enhancement of pollution reduction and carbon mitigation. Phased outcomes have been achieved through the application of scientific technological innovations and digital intelligent transformation, and follow up development plans have been formulated. The company has been honored as one of China’s first batch of 45“Green and Low carbon Benchmark Wastewater Treatment Plants”. Its practical experience can serve as a replicable and promotable reference for the green and low carbon transformation of similar wastewater treatment enterprises nationwide.

成果亮点

一是智慧低碳运营成效显著。通过智慧水务平台和无人值守系统应用，实现曝气、药剂投加自动智能控制，吨水电耗、药耗逐年下降，有效降低了综合碳排放量，管理效率不断提升，出水水质远优于设计要求的《陕西省黄河流域污水综合排放标准》A标准，各项指标达标率100%。

二是绿电替代与低碳出行效益明显。年均利用光伏绿电约100万kWh，年减排二氧化碳约99.7吨；“绿电绿行”政策带动公司职工新能源车汽车数量快速增长，每年可节约燃油费约16万元，减少石化能源消耗约28吨，年减排二氧化碳约60吨，形成“绿电产用—低碳出行”良性循环。

三是绿色空间使用模式创新，理念深入人心。通过绿色低碳政策宣贯、目标设定、项目实施，立足既有厂区空间，不新增建设用地，通过运营优化与技术创新，将传统单一生产型污水处理厂升级为集污染治理、绿色能源产用、资源循环利用、生态科普宣教多功能于一体的复合型绿色空间，实现空间价值多维提升。绿色低碳生产生活方式理念深入人心，形成了每位员工的行为规范和行动自觉。

四是模式可复制可推广性强。项目实践避免依赖特殊场景与大量新增投资，依托既有厂区空间即可实施。公司通过近年不断探索提升，已基本形成以减污降碳、协同增效为目标的绿色低碳发展模式，通过科技创新成果应用与数智化转型发展取得阶段性成效，并制定了后续发展计划。公司获评全国首批45家“污水处理绿色低碳标杆厂”荣誉称号，可为国内同类型企业绿色低碳发展转型提供可复制、可推广的实践经验参考。

Project Highlights

Ecological and Environmental Benefits The company’s green and low carbon projects deliver an annual carbon dioxide emission reduction of approximately 160 tons (99.7 tons from photovoltaic power generation plus 60 tons from the Green Power and Green Commuting initiative). Around 300,000 tons of water are saved each year, with high quality reclaimed water supplied as well. Boasting excellent effluent quality, the project improves the water quality of the Yanhe River and the surrounding water environment, contributing to the development of a “Beautiful China”.

Industrial Demonstration Benefits As a water sector demonstration project for central local and government enterprise cooperation as well as a high tech enterprise, the plant has been selected into China’s first batch of “Green and Low carbon Benchmark Wastewater Treatment Plants”. It provides a practical case for green space utilization by environmental infrastructure enterprises along the Yellow River Basin and delivers sound demonstration effects.

Social Benefits The water ecology and environmental protection science popularization and education base is open to the general public on a regular basis. Serving as a municipal level wastewater treatment training base, it undertakes training programmes for operation and maintenance personnel across the city. The company supports provincial and municipal publicity campaigns on ecological conservation of the Yellow River Basin and disseminates new concepts of pollution control. Initiatives including industrial exchanges and training, public open day activities and publicity and education events help foster a favourable atmosphere for green and low carbon development.

成果影响力

生态环境效益方面，公司绿色低碳项目年减排二氧化碳约160吨（光伏99.7吨+绿电绿行60吨），年节水约30万吨，并提供优质再生水。项目出水水质优异，提升了延河水质和周边水环境质量，助力“美丽中国”建设。

行业示范方面，作为央地合作、政企合作的水务示范项目和高新技术企业，入选全国首批“污水处理绿色低碳标杆厂”，为黄河流域环境基础设施企业绿色空间使用提供案例，具有示范作用。

社会效益方面，水生态环保宣教科普基地面向社会公众常态化开放，同时作为市级污水处理培训基地承担全市运维人员培训职责。配合省、市黄河流域生态保护宣传、传播治污新理念；通过行业交流培训、公众开放、宣传教育等举措，营造绿色低碳发展良好氛围。

Reviews & Honors

Evaluation by Competent Authorities The project has obtained an Excellent rating in all annual PPP performance assessments. Local ecological environment and urban management authorities have spoken highly of the plant’s operation and maintenance as well as the construction of the science popularization base. With regular opening of the science popularization base to visitors, industry peers and teachers and students participating in research and study activities have given positive feedback on its green environment and popular science experience. The plant has hosted numerous on site visits and exchanges for water sector colleagues from inside and outside Shaanxi Province, and its practical model has won wide recognition across the industry.

Major Honors and Awards In 2021, the project was awarded the titles of“Provincial Civilized Construction Site”of Shaanxi Province and “Safe and Civilized Standardized Construction Site” of CECEP Group. In 2022, it was officially designated as the“Wastewater treatment Industry Training Base” by Yan’an Municipal Bureau of Ecology and Environment and Yan’an Municipal Bureau of Urban Management and Law enforcement. In 2023, the company was certified as a High tech Enterprise of Shaanxi Province. In the same year, it received the title of“CECEP Demonstration Unit for Safety, Environmental Protection and Standardization in Beautiful China Initiative”. In 2024, it was successfully selected as one of the first batch of 45 national level“Green and Low carbon Benchmark Wastewater Treatment Plants” announced by the National Development and Reform Commission and the Ministry of Housing and Urban Rural Development.

评价与荣誉

主管部门评价：

历年PPP项目绩效考核均获评优秀；属地生态环境、城管部门对厂区运维及科普基地建设高度认可；科普基地常态化开放，行业访客与研学师生对绿色环境与科普体验反响良好；多次承接省内外水务同行观摩交流，实践模式获得行业广泛肯定。

主要荣誉：

2021年荣获陕西省“省级文明工地”和中国节能集团公司“安全文明标准化工地”荣誉；

2022年延安市生态环境局、城市管理执法局授牌“污水处理行业培训基地”；

2023年获评陕西省高新技术企业，同年获“中国节能美丽中国建设·安全环保标准化示范单位”称号；

2024年成功入选国家发改委、住建部公布的全国首批45家“污水处理绿色低碳标杆厂”。