Executive Summary
of
Consolidated Environment Assessment
Liuzhou Environment Management Project (II)
Guangxi Environmental ProtectionResearchAcademy
July, 2010
1
CEA of LZEMP II ABBREVIATION
Table of Contents
1. GENERAL
1.1 General Context of Project
1.2 related Environment laws and regulations
1.3 Environmental Quality Standard
2 PROJECT DESCRIPTIONS
2.1 Profile of sub-projects
2.2 Construction alternative of subprojects
3 General Environmental and social PROFILES
3.1 Liuzhou urban area
3.2 Liucheng County
3.3 Rongshui County
3.4 Rong’an County
3.5 Sanjiang County
4 Environmental Impact Assessments
4.1 Environment Impact during Construction
4.2 Environment Impact during Operation
4.3 Environment Risk Assessment
5 ALTERNATIVE ANALYSES
5.1 Objective and Principle of Alternative Analysis
5.2 No Project Analysis
5.3 WWTP Alternative Analysis
5.4 Sludge Disposal Process Alternative
5.5 Alternative Analysis of Sewer Network Engineering
6 .PUBLIC CONSULTATION AND INFORMATION DISCLOSURE
6.1 Information Disclosure
6.2 Public Consultation
7. Environment management plan
7.1 Objective
7.2 Environmental Management System
7.3Mitigation Measures
7.4 Environmental Monitoring Plan
7.5. Environmental Management Training
7.6 Environment Reporting System
8 Conclusion of EA
9. Finding of social impact analysis
9.1 basis of resettlement
9.2 planning
1
Summary of CEA
ABBREVIATIONS
CEA Consolidated Environmental Assessment
CSEE Construction Supervision Environmental Engineer
DI Design Institute
EA Environmental Assessment
EIA Environmental Impact Assessment
EMP Environmental Management and Monitoring Plan
EMSEnvironmental Monitoring Station
EPB Environmental Protection Bureau
IA Implementation Agency
PIU project Implementation unit
GEPRA Guangxi Environmental ProtectionResearchAcademy
MSWM Municipal Solid Waste Management
POProject Owner
PMO Project Management Office
PRC The People’s Republic of China
SE Supervision Engineer
WB World Bank
WWTP Wastewater Treatment Plant
LEPB Liuzhou Environment Project Bureau
GEPB Guangxi Provincial Environmental Protection Bureau
LZEMP Liuzhou Environment Management Project
LZPMO Liuzhou Project Management Office
CHEMICAL ABBREVIATIONS
A²/O Anaerobic-anoxic-oxic biologic phosphorus & nitrogen
BOD5Biochemical Oxygen Demand （5 days）
COD Chemical Oxygen Demand
CODMnPermanganate Index
NH3-N Ammonia Nitrogen
SBR Sequencing Batch Reactor Processing
SS Suspended Solids
TN Total Nitrogen
TP Total Phosphorus
TSP Total Suspended Particulates
1. GENERAL
1.1 General Context of Project
Liuzhou is located in the center by north of Guangxi and middle reaches of Liujiang River, its geographic position is E 108°50′~109°44′ to N 23°54′~24°50′. After adjustment of administrative area in 2002, Sanjiang, Rongshui, Rong’an, Luzhai, Liucheng, and Liujiang 6 counties are under jurisdiction of Liuzhou city, its area is increased to 18707.25 km2, population increased to 3.625 million (including non-agriculture population of 1.2639 million) the urban area is 658.31km2 with urban population of 1.0184 million (by Yearbook of 2007).
Liuzhou city is a key industrial city and second largest city of Guangxi。 Since reform and opening, its social economy and urban construction have been being developed rapidly, the economic development also brings a depravation of environment. At present, plenty of untreated urban wastewater from urban area and counties are discharged directly, thus rivers and ditches are polluted, it is quite urgent to improve the water environment of Liuzhou.
The total estimated investment of LZEMP II is RMB1.8316 billion. To expedite the wastewater treatment, USD150 million loans (RMB1.0245 billion) from the World Bank is proposed to finance LZEMP II.Liuzhou Municipal Wastewater Treatment Co., Ltd /LMWTC entrusted GuangxiEnvironmentalProtectionResearchAcademy(GEPRA) to prepare CEA on the basis of environmental assessment of all Sub-projects implemented and related environmental assessment reports finished.
Except CEA, following two relevant reports are prepared by GEPRA:
1) Summary of CEA: extracted on basis of CEA
2) Environment Management Plan: prepared on basis of EMP of subprojects, including environment impact, mitigation measures, environment monitoring plan, institution arrangement, capacity development and training and estimated cost.
1.2 Related Environment laws and regulations
The related laws and regulations at national and local level as well as 10 safeguards policies of the Bank are as follow:
（1）《Environmental Protection Law of the People's Republic of China》（1989）;
（2）《Atmosphere Pollution prevention Law of the People’s Republic of China》（2000）;
（3）《Water Pollution prevention Law of the People’s Republic of China》（2008）;
（4）《Noise Pollution prevention Law of the People's Republic of China》（1996）;
（5）《Environmental Impact Assessment Law of the People's Republic of China》（2003）;
Safeguards policies of the Bank involved during EIA
（1）OP/BP 4.01 Environmental Assessment;
（2）BP17.50 Information Disclosure;
（3）OP 4.11 Physical Cultural Resources
1.3 Environmental Quality Standard
1.3.1 Environmental Quality Standard
（1） Atmospheric environment
Atmospheric environment implements GB3095-1996 《Atmosphere Quality Standard》 and TJ36-79《Industrial Enterprise Design Health Standard》(Max. allowable concentration of harmful substances in atmosphere at residential area), standard value implemented of different Sub-projects
（2）Water Environment
Quality standard of surface water environment implements GB3838-2002《Quality standard of surface water environment》
（3）Noise Environment
Noise Environment of different Sub-projects implements GB3096-2008《Quality standard of noise environment》,standard value。
1.3.2 Pollution Discharge Control Standard
（1）Water contamination discharge standard
Wastewater discharge standard of WWTP Sub-project implements GB18918-2002《Contamination discharge assessment standard of urban WWTP》,and wastewater discharge standard of other Sub-projects implements GB8978-1996《Wastewater integral discharge standard》
（2）Air pollution discharge standard
Atmospheric contamination discharge implements GB16297-1996《Atmospheric contamination integral discharge standard》,GBl4554-93《Fetor contamination discharge standard》,GB4915-2004《Cement industrial atmosphere contamination discharge standard》,GB14554-93《Fetor contamination discharge standard》and GB18485-2001《Domestic rubbish burning pollution control standard》
（3）Noise contamination discharge standard
Noise contamination discharge standard of sub-project implements GB12523-90Noise limit value of construction site boundaryand GB12348-2008Noise discharge standard of boundary environment of industrial enterprise.
（4 ）Solid waste discharge standard
Solid waste discharge standard of sub-project implements GB18599-2001《General industrial solid waste storage and treatment field pollution discharge standard》, and GB4284-84《Contamination control standard in farming sludge》.
2 PROJECT DESCRIPTIONS
2.1 Profile of sub-projects
LZEMP II consists of 8 sub-projects that are located in 2 districts in Liuzhou and 4 counties. According to the characteristic of EIA, 8 Sub-projects’ are included in 3 categories, wastewater subprojects refer to Table 2.1, the urban-suburban drainage subproject and sludge management subproject refer to Table 2.2. LMWTC is PIU of all subprojects.
2.2 Construction alternative of subprojects
2.2.1 Municipal wastewater and sewer networks
The construction alternative of wastewater Sub-projects, refer to Table 2.3.
2.2.2 Suburban drainage and river dredging subproject
The suburban drainage subproject proposes to build and improve the drainage system of 4 WWTP (Baisha, Longquanshan, Yanghe and Labao WWTP network system), including pipeline of 148215m and 4 sewage lifting pumping stations.
The sections to be dredged include: 1) Huilongchong combined canal with estimated dredging volume of 4800m3; 2) upper stream of Zhu’exi Brook: it is 6100m long with dredging volume of 9150m3. River dredging is performed through cofferdam. The coffer dam is built to drain water. The silt is excavated and transferred after the water vaporize; 3) Zhutoutang is located in the upper reach of Jianpanshan combined canal with water surface area of 4.67ha. Zhutoutang Pond is dredged with dredging volume of 8000m3 to improve the environment of pond completely.
1
Summary of CEA
Table 2.1 Profile of Wastewater Sub-projects
Component / Service year（Year） / Population served
（Ten thousand） / Designed capacity
（10,000 m3/d） / Counterpart network length L（m）,pipe diameter d（mm） / Drainage system / Discharge to / Disinfection way of effluent
Current Status / After construction completion / Current status / After construction completion
Sanjiang WWTP / Short term：2013
Long term：2025 / Short term：6
Long term：10 / Short term： 1.0
Long term：3.0 / L：9710
d：DN 400～DN 1200 / Combined system / The old urban area adopts the combined system, and the new urban area adopts the separate system / Discharged directly to XunjiangRiver / XunjiangRiver / UV
Rong’an WWTP / Short term：2013
Long term：2025 / Short term：14
Long term：20 / Short term：3.0
Long term：7.5 / L：10740
d：DN 500～DN 1200 / Combined system / The new urban area adopts separate system in short term, and old one adopts the combined system; fully adopts the separate system for long term / Discharge directly to RongjiangRiver / RongjiangRiver / UV
Rongshui WWTP / Short term：2013
Long term：2025 / Short term：9.6
Long term：15 / Short term：2.0
Long term：6.0 / L：27200
d：DN 300～DN 1200 / Combined system / The old urban area adopts the combined system, and the new urban area adopts the separate system. The old urban area means Chengbei district (current district); the new urban area means Shuidong district and Chengnan district. / Discharge directly to RongjiangRiver / RongjiangRiver / UV
Liucheng WWTP / Short term：2013
Long term：2025 / Short term：8
Long term：12.16 / Short term：2.0
Long term：5.0 / L：11740
d：DN 300～DN 1200 / Combined system / The old urban area at the east river banks the combined system and the new urban area at the west river bank adopts the separate system. / Discharge directly to RongjiangRiver / RongjiangRiver / UV
Shatang WWTP / Short term： 2013
Long term：2025 / Short term：6.29
Long term：12.5 / Short term：2.0
Long term：6.0 / L：48293
d：DN 300～DN 1200 / Combined system / Adopting the separate system within the scope of planning area / Discharge directly to XianglanRiver / LiujiangRiver / UV
Guantang WWTP / Short term：2013
Long term：2025 / Short term：10
Long term：50 / Short term：5.0
Long term：21.0 / L：296000
d：DN 300～DN 1200 / Combined system / Adopting the separate system within the scope of planning area / Discharge directly to LiujiangRiver / LiujiangRiver / UV
Table 2.astewater subprojects.
e 2.2-2.project and sludge managment arrangement, capacity devepment and trainig and estimated cost. 2 Profile of Drainage and Sludge Management Sub-projects
treatment / Construction
effect / Construction time
Liuzhou urban-suburb drainage engineering / Liuzhou urban and suburb area and partial districts, distributed in the following drainage systems: Baisha WWTP network system: Huilongchong combined wastewater channel (section of Que’ershan park ~ River side); Longquanshan WWTP network system; Yanghe WWTP network system; Labao WWTP network system: JiuquheRiver sewage intercepting engineering. Total length of pipe channel to be built is 141369m, 4 sewage lifting pumping stations. Details: Baisha WWTP network system: Huilongchong combined wastewater channel (section of Que’ershan park ~ River side), locate at old zone of city, adopts interception combined drainage system; Longquanshan WWTP network system: area at the south of Taohua section and east section of south part of Liushi road is new area or new programmed area, adopts combined system, other places are located at old zone, adopt interception combined drainage system; Yanghe WWTP network system: Yanghe development zone (except Gutingshan living area), north section of Hedong road, east area of east section of south part of Liushi road are new area or new programmed area, and east natural drainage area (Dudengshan section) of east section of east ring road is basically new zone, they all adopt separate system; area between east ring road and Xueyuan road and other places locate at old zone of city which adopted combined drainage system adopt combined drainage system. / Combined and
separate system / Improve Liuzhou urban drainage system / 2009-2015
dewatered sludge management Sub-project / Located within Yufeng Group Co., Ltd at Taiyang village at the west suburb of Liuzhou city. Treat dewatering sludge produced by Liuzhou and surrounding Longquanshan, Baisha, Yanghe, Labao and Guantang 5 WWTPs. The average sludge from Liuzhou WWTPs is about 300m3/d in 2010 and 500m3/d in 2020. The proper feeding volume of domestic sludge with moisture of 80% in kiln is 5% 0f total kiln system material feeding volume. The design sludge treatment capacity is 300m3/d,the production capacity of production line 2,3 and 4 are 3200t/d,2500t/d and 2800t/d respectively, the ratio of raw material to clinker is 1.65,so the maximum sludge treatment capacity of these 3 production lines is 264t/d, 206.25t/and 231t/d respectively, and the sludge from liuzhou WWTPs is about 300m3/d in near future. Because the production lines are overhauled regularly, to ensure the sludge from liuzhou WWTPs is treated, the dewatered sludge management sub-project proposes to use production line 2,3 and 4 to treat the sludge. Each kiln is designed to treat sludge 100t/d（4.17t/h） and is equipped with 1 set sludge pumping system . / Used as cement aggregate (replace part of clay) to produce cement / Treat sludge of 4 WWTPs of Liuzhou city collectively / ~2020
Table 2.3 Construction scheme and process of urban wastewater Sub-project
Project / Pipe line distribution / Constructionmethod / Discharge
standard* / Processing
technology
Sanjiang WWTP / Waste network system is in west river bank and east river bank two systems: ① west river bank wastewater system: lay wastewater interception trunk pipe at Zhongchang street near river, and reach to programmed WWTP directly. ②east river bank wastewater system: lay wastewater interception trunk pipe at Tongxiang avenue for collecting wastewater of east river bank, then drained to southwest direction, and finally passes XunjiangRiver from the south of Guyi town, and only after joining west river bank wastewater system, it can get into programmed WWTP. River-crossing pipe are laid upper end of Dazhou divarication of XunjiangRiver and at the bottom of river, river-crossing pipe are pressure flow. / Pipe jacking/Trenched piping construction / Grade I
B standard / Iimproved Carrousel oxidation
ditch
Rong’an WWTP / Take good use of existing drainage establishments, build wastewater interception pipe depending on existing drainage channel at west river bank to form wastewater interception system along river; and build waste pipe at east river bank to form independent wastewater collecting system. / Pipe jacking/Trenched piping construction / Grade I
B standard
Rongshui WWTP / （1）Match factory wastewater system: this system mainly collects urban wastewater at the north of Qiaofengbai road, served area 3.56km2. 2）Gouduling wastewater system: this system mainly collects wastewater at the south of Qiaofengbai road, and both banks of Gouduling at the north of Danjiang River, wastewater drained by industrial land at northeast of the county town also enter into this collecting system, served area 3.0 km2.（3）Shuidong new district wastewater system: this system collects wastewater of Shuidong new district, total served area 5.15km2,and served area in short term 1.72km2. （4）south county town wastewater system: This system collects wastewater of scattered industrial and residential wastewater at the south river bank of Danjiang River, total served area 2.5 km2. / Pipe jacking/Trenched piping construction / Grade I
B standard
Liucheng WWTP / （1）Town wastewater system: mainly collects wastewater of area at the north of Xiangyang road, east of Hedong avenue and south of Yangliu River, served area 1.83km2,including served area 1.08km2 in short term.（2）Liutang wastewater system: mainly collects wastewater of area at the north of Hedong avenue to Xiangyang road, and south of Yangliu Rive, as well as enclosed area by Hedong avenue, Baiyangbei road, Baiyangdong road and Chengzhong road, served area 2.1 km2.（3）Party committee wastewater system: mainly collects wastewater of whole county town, total served area 12.29km2, including mainly serves for Hedong district of Liucheng county in short term with served area 7.05 km2. / Pipe jacking/Trenched piping construction / Grade I
B standard
Shatang WWTP / ① Town wastewater system: mainly collects domestic wastewater of area at Hengsan road and north of programmed railway, served area 7.83 km2, including urban construction land 7.74km2, and served area 3.13 km2 in short term. ② Shatang southwest wastewater system: mainly collects residential and industrial wastewater at the south of Hengsan road and west of Zhongsan road, served area 3.39 km2, and served area 1.97 km2 in short term. Shatang southeast wastewater system: mainly collects residential and industrial wastewater at the south of programmed railway and east of Zhongsan road, served area 4.74 km2, and served area 1.28 km2 in short term. / Pipe jacking/Trenched piping construction / Grade I
B standard
Guantang WWTP / Trunk waste pipes are laid along urban roads, and laid under footpath, green belt or slow driveway at the side of lots of wastewater or less underground pipes and lines. Wastewater at the north of north branch of Yaolan road, including collecting wastewater of both areas at the north side of programmed zone to waste pipe at Yaolan road, wastewater rounding yaolan road to be collected to waste pipe at Liudong avenue, and wastewater at the south of south branch of Yaolan road to be collected to waste pipe at south branch of Yaolan road. After all wastewater collected, then enter into WWTP area from north side of WWTP. / Pipe jacking/Trenched piping construction / Grade I
A standard / Improved Carrousel oxidation ditch biologic phosphorus & nitrogen + chemical reagent (Aluminate) phosphorus + coagulatory settler filtration depth processing
Note：Discharge standard means Contamination discharge standard of urban WWTP GB18918-2002
1
Summary of CEA
2.2.3 Sludge co-combustion subproject
The sludge from Liuzhou WWTPs is about 300m3/d in 2010 based on the current treatment capacity. The dewatered sludge management sub-project proposes to use production line 2, 3 and 4 to treat the sludge. Each kiln is designed to treat sludge 100t/d（4.17t/h） and is equipped with 1 set sludge pumping system ..
（1）sludge transport and storage process
Sludge is transported from WWTP to Guangxi Yufeng Cement Stock Co., Ltd by closed transportation vehicles and fed to kiln by relevant units
（2）Sludge disposal process flow in Cement kiln
The sludge is fed to the bottom of decomposing furnace by injecting unit and then to the smoke chamber in the end of kiln, where the sludge will stay for about 30 minutes with kiln internal temperature increasing from 900 to 1450 ℃ and become the clinker. The clinker will come out from the head of kiln and become cement after further processing. The pre-heaters of 2#, 3#, and 4# cement production line are five-class cyclone pre-heater which can recycle the raw meal, remove dust and pre-heat. The dust catcher behind the wet tower and dust catcher behind cooler are the electric Dust catcher. The wet tower is to pulverize the water and sprinkle to lower temperature and reduce the dust Specific resistance, it is charged easier. The dust catching rate of cement production line is 99.7&. refer to process flow diagram 2.1：